Cookies used in this website are gluten free, wheat free and dairy free. By using this website you agree to our use of cookies. More Info
Guest
Login Below
Join Us On Social Media!
   
Get The Model Boats App!
Apple App Store
Android app on Google Play


Help Support This Website
£
or enter custom amount

(Non Contributor)

Help support this free
website and donate.



£285 a year is needed to keep the website and apps online. Please consider donating £5 or more to help towards these fees.
All donations are securely managed through PayPal. Amounts donated are not published online.

Many thanks for your kind support.

Model Boats Website Team


Donation History
October 2017: 6 people
September 2017: 15 people
August 2017: 10 people
July 2017: 16 people
June 2017: 8 people
May 2017: 8 people
April 2017: 23 people
March 2017: 9 people
February 2017: 5 people


Unique Visitors This Month

Website Members

Terms and Conditions
Privacy Policy
Advertising
Contact


Model Boats Website
Active Users (15)
Login or Register
To Remove This Ad
Login or Register
To Remove This Ad
>> Home > Tags > bulkhead

bulkhead
bulkheads
bulkhead
Hobby Engine Richardson Upgrade by RNinMunich Fleet Admiral!   Posted: 13 days ago
Hi Neil, agree with Dave, no need to rush it, think each step through first! Transducers should be mounted on a vertical surface so the sound doesn't vanish into the clouds😉 You want to project across the water. Midships on both sides is ideal. But not right next to a bulkhead, in the middle of an open space is best. Sort out the basics first i.e. propulsion and battery. Heaviest items as low as possible checking for balance and trim as you go. Leave the wheelhouse and special FX to last when you can see what space and weight margin is left. Cheers Doug 😎

M.V. TEAKWOOD by RHBaker Fleet Admiral!   Posted: 15 days ago
Recently visited the U.K and collected the hull from a relative. It is now back in Canada so a detailed examination can be carried out. First impressions are: 1) The Deans Velarde hull bulwarks have fortunately not been trimmed to the final dimensions, these are marked in pencil. The excess material will really help as the Teakwood forecastle extends further sternwards and this extra material avoids having to build the forward bulwarks up. 2) The hull has many details added to facilitate positioning; portholes, rubbing strakes etc. These will all have to be sanded off as they do not fit the Teakwood. 3) The Velarde has a pronounced “dodger” on top of the bulwarks around the bow. This will also have to be removed. 4) The bow leading edge is quite bluff, possibly to suite the GF manufacturing process. This will probably work in my favour as it can be extended forward and slimmed into the Teakwood style entry, which is sharper and more vertical. 5) The hull is slightly oversize (about .300”) , not enough to be concerned about, but it does make the revised LBP correct! 6) The hull is nicely made and a credit to Deans Marine. The initial plan was to modify the hull shape first to adapt it into the Teakwood. Decided, as it is quite flexible, it would be better to add a keel strip, bulkheads and deck supports first. It would then become rigid enough to work. This revision to my original thoughts proved the best approach. The hull needs several modifications, but until it is rigid it is premature to implement them. The modifications will only prove more difficult and then inaccurate. Made up a number of plywood bulkheads, based upon the MM Velarde plan, but reduced in height to suite the Teakwood. As these are trial fitted into place in the GF hull further adjustments can be made. Once satisfied with the bulkhead fit, they and the keel were epoxied into place. Horizontal stringers were also added to ensure the bulkheads were accurately positioned, vertical and not twisted until the epoxy set. Can probably remove them once the hull structure is compete, although they could also be left in place to support the deck. Will probably largely leave in place. Deck support stringers were also epoxied into place and the hull sides glued to them. The hull is now good and stiff and can be worked safely. As the stern portion will require further adjustment, the sides were left free from the stern bulkhead rearwards. This will allow the rework without cutting through recently fitted items.

Hobby Engine Richardson Upgrade by RNinMunich Fleet Admiral!   Posted: 21 days ago
Hi Mark, many thanks, good tips 👍 Think I'll remove the rear hatch lock completely and hold the hatch down with neodymium magnets. Re Plastic Trays; Don't even want to think about how you found out! 😡Thanks for the warning👍 I'll go careful and maybe add a semi-bulkhead stiffener!? Cheers Doug 😎

Crash Tender Shaft Tube Poistion by RNinMunich Fleet Admiral!   Posted: 26 days ago
Hi Neil, your Dad's dead right! I've come to wonder how the heck I ever found time to go to work😉 important is to know just what you want to do with your time long before you retire - and then DO IT! Like wot i am now 😁 Yep, the cosmetics are to tidy up around all the hull and bulkhead breakthroughs and blend them in to the underlying structure. With special attention to ensuring that all hull breakthroughs (prop shaft / rudder shaft etc) are thoroughly waterproofed!! Good sealing on bulkhead breakthroughs is just(!) for 'Damage Control' to limit the spread of ingressive water in case summat nasty happens🤔 Cheers Doug 😎

Crash Tender Shaft Tube Poistion by RNinMunich Fleet Admiral!   Posted: 1 month ago
Hi Dave, I was answering the query about the new shaft holes in the keel and bulkheads to finally fix the shaft. NOT 'soaking' the whole hull!! Doug

Crash Tender Shaft Tube Poistion by RNinMunich Fleet Admiral!   Posted: 1 month ago
Hi Neil, forgot to mention, Re the 'new exposed wood': when you are sure the shaft is correctly lined up on the keel soak the hull and bulkhead breakthroughs, wedges etc with 2 part epoxy and leave in a quiet place (!) to cure. This will also seal any exposed wood. Then tidy up, fill and fettle inside and out. ---> Good to go! (As our colonial brothers 😉 say!) Doug 😎

Crash Tender Shaft Tube Poistion by neilmc Commander   Posted: 1 month ago
I like the layout of yours pmdevlin as its shows me that the bulkhead behind the motor isn't actually structural and I did struggle with it today ended up cutting a section out of it to ease the motor in.

Crash Tender Shaft Tube Poistion by neilmc Commander   Posted: 1 month ago
Standard Saturday Mrs Mac decided I had other things to do before being allowed out to play but I think I've got there, just need to check it's right before gluing up. OK so I lied that I wouldn't be asking more questions on this topic😁😁 The hole has been opened out enough to achieve 3/4" but the photo doesn't really show it. It took some time to achieve it as well more time than I thought, even used my dremel at one point😁. But pmdevlin's tip on using a disc was a great help. The position of the outer tube on the hull needs a slight adjustment but nothing major and still achievable as no glue. I did have a check fit of the motor and came across another issue as there was no way I could achieve alignment of the shaft and motor which was made easier by Doug's universal coupling idea😁. I went for removing the last remaining piece of the old motor mount (should have listened to Dave a year ago) which took about an hour as it was glued in good and proper.😤😤😤😤😤 There is some clearance on the hull from the prop so think I'll be going for a 30mm prop as suggested by Dave as to my surprise mine is 40mm diameter. Hopefully the arrangement is all good and I can use Dave's and Doug's tips on getting it secured. I still need to blank off the water pick up and fit the new rudder tube. Also I think the motor alignment will still be interesting as after removing the last bit of the old mount the motor was interfering with the bulkhead behind it so removed so it. Also will possibly need to take some out of the hull centre piece to achieve a perfect alignment. Hopefully tomorrow will go well as will also fitting the oiler as seen on Robbob's Build Blog.

Crash Tender Shaft Tube Poistion by RNinMunich Fleet Admiral!   Posted: 2 months ago
Hi Neil, yes, very similar. Could be regarded to as a first step before applying Eze-Kote to give it a harder, knock and almost everything else resistant surface. Hammerite then sticks to it like the proverbial to the blanket and you have a super clean 'engine compartment' dead easy to keep clean. 😊 80 quid for a brushless !!! Do you want it gold plated or what? My Propdrive 2830 cost less than 20 knicker from Hobbyking and was delivered almost before I ordered it! Just make sure it comes from the UK or EU (still!?🤔) warehouse and not USA or Global. otherwise you might get stuck for import tax 😡 For the motor mount / shaft alignment: no one said it was easy, but Nothing's Impossible', maybe that's why I drive Toyota!!😁 back end is determined by the diameter of the prop you want to fit, which in the case of brushless motor should be roughly the same diameter as the brushless (outrunner). In my case 28mm motor and 30mm prop. This defines how far you can lift the aft end of the shaft, leave at least 1cm between the prop tip and the hull! This reduces unwanted interaction between the vortex from the prop and the lamina flow along the hull, result; more forward thrust and better rudder effect. (Didn't spend 30 odd years talking to shipyards for nowt😉) If you have plan (or at least a sketch - take some measurements if you don't have one of these and make a sketch) of the keel and existing motor mount; project back from the newly determined exit point of the shaft. Check how far forward you need to go to be able to comfortably fit the motor mount with good alignment and purchase a shaft of appropriate length. Cut a wood block to fit around the keel as the basic mount and 'fiddle' with it until your motor and mounting (e.g. the Robbe / Romarin 400 mount) aligns with the shaft line. Alignment is checked by running the motor at a fixed low speed with an ammeter showing the current it draws. Shim the motor mount up / down, and shift slowly from side to side until the current reading is a minimum. Then glue and screw everything in place quick before anything moves! Takes almost longer to describe than to do😉 The coupling type shown in my photo is called a 'Steg' coupling here in Germany (don't know the English🤔) and available from Krick Modellbau, for various motor shaft / prop shaft diameters, here the link to their English page- http://www.krickshop.de/?shop=krick_e Part number for the 3.17mm (1/8") to 4.0mm version I used is 63902. part number for the motor mount I used for my 28mm brushless is 42117. Advantages (to me at least!) they are not as long as the traditional UJ and Cardan types, they are resilient but don't flop about like the UJ types so are much easier to fit and align. Cos they are shorter you can use 'em for mountings in confined spaces. And they don't make no noise!! 😉 One final tip (may not be so useful on hard plywood built boats!). When I had this problem with my destroyer I sharpened the end of an 8mm alu tube (same as the shaft tube dia) and used it to bore back from the hull exit to the last bulkhead before the motor mounts. the bulkheads though were 1/4" balsa! Nice and soft man 😉 Hope this helps more than confuses, but it all worked for me! Cheers and happy fiddling, Doug 😎

Crash Tender Shaft Tube Poistion by RNinMunich Fleet Admiral!   Posted: 2 months ago
Hi Steve, When I repositioned the shafts in my destroyer I wedged them in with slivers of balsa until the alignment was right, then soaked the breakthroughs in keel and bulkheads in epoxy. When all was properly cured I did the usual cosmetic filling, sanding and repainting. Has been working a treat for over 20 years. 😊 Again re Raboesch; I am gradually replacing all my plastic and no name props with Raboesch. The quality and, above all, balancing is superior. Cheers Doug 😎

Decks by RNinMunich Fleet Admiral!   Posted: 2 months ago
Some info. on radar, armament and wartime mods! 'Ya pays ya money and yer takes yer choice'! 😎 "Armament, electronics and protection The main armament of the Illustrious class consisted of sixteen quick-firing (QF) 4.5-inch (110 mm) dual-purpose guns in eight twin-gun turrets, four in sponsons on each side of the hull. The roofs of the gun turrets protruded above the level of the flight deck to allow them to fire across the deck at high elevations.[11] The gun had a maximum range of 20,760 yards (18,980 m).[12] Her light anti-aircraft defences included six octuple mounts for QF 2-pounder ("pom-pom") anti-aircraft (AA) guns, two each fore and aft of the island and two in sponsons on the port side of the hull.[11] The 2-pounder gun had a maximum range of 6,800 yards (6,200 m).[13] The completion of Illustrious was delayed two months to fit her with a Type 79Z early-warning radar; she was the first aircraft carrier in the world to be fitted with radar before completion.[11] This version of the radar had separate transmitting and receiving antennas which required a new mainmast to be added to the aft end of the island to mount the transmitter.[14] The Illustrious-class ships had a flight deck protected by 3 inches (76 mm) of armour and the internal sides and ends of the hangars were 4.5 inches (114 mm) thick. The hangar deck itself was 2.5 inches (64 mm) thick and extended the full width of the ship to meet the top of the 4.5-inch waterline armour belt. The belt was closed by 2.5-inch transverse bulkheads fore and aft. The underwater defence system was a layered system of liquid- and air-filled compartments backed by a 1.5-inch (38 mm) splinter bulkhead.[15] Wartime modifications While under repair in 1941, Illustrious's rear "round-down" was flattened to increase the usable length of the flight deck to 670 feet (204.2 m).[16] This increased her aircraft complement to 41 aircraft by use of a permanent deck park.[17] Her light AA armament was also augmented by the addition of 10 Oerlikon 20 mm autocannon in single mounts with a maximum range of 4,800 yards (4,400 m).[18] In addition the two steel fire curtains in the hangar were replaced by asbestos ones.[19] After her return to the UK later that year, her Type 79Z radar was replaced by a Type 281 system and a Type 285 gunnery radar was mounted on one of the main fire-control directors.[16] The additional crewmen, maintenance personnel and facilities needed to support these aircraft, weapons and sensors increased her complement to 1,326.[7] During her 1943 refits, the flight deck was modified to extend its usable length to 740 feet (225.6 m), and "outriggers" were probably added at this time. These were 'U'-shaped beams that extended from the side of the flight deck into which aircraft tailwheels were placed. The aircraft were pushed back until the main wheels were near the edge of the flight deck to allow more aircraft to be stored on the deck. Twin Oerlikon mounts replaced most of the single mounts. Other twin mounts were added so that by May she had a total of eighteen twin and two single mounts. The Type 281 radar was replaced by an upgraded Type 281M, and a single-antenna Type 79M was added. Type 282 gunnery radars were added for each of the "pom-pom" directors, and the rest of the main directors were fitted with Type 285 radars. A Type 272 target-indicator radar was mounted above her bridge.[16] These changes increased her aircraft capacity to 57[20] and caused her crew to grow to 1,831.[7] A year later, in preparation for her service against the Japanese in the Pacific, one starboard octuple "pom-pom" mount, directly abaft the island, was replaced by two 40 mm Bofors AA guns;[21] which had a maximum range of 10,750 yards (9,830 m).[22] Two more twin Oerlikon mounts were added, and her boilers were retubed.[21] At this time her complement was 1,997 officers and enlisted men.[7] By 1945, accumulated wear-and-tear as well as undiagnosed shock damage to Illustrious's machinery caused severe vibrations in her centre propeller shaft at high speeds. In an effort to cure the problem, the propeller was removed, and the shaft was locked in place in February; these radical measures succeeded in reducing, but not eliminating, the vibrations and reduced the ship's speed to about 24 knots (44 km/h; 28 mph).["

The electrics, drive & radio by robbob Fleet Admiral!   Posted: 4 months ago
Hi Doug and AllenA. Yes, it is indeed good old Hammerite 👍 I sealed all the interior surfaces with a couple of coats of sanding sealer and then two coats of the silver Hammerite on the hull bottom, sides and bulkheads and it gives a quite an attractive finish which is very durable. It was recommended by VMW in the build instructions and I'm very pleased with the result 😁

The electrics, drive & radio by robbob Fleet Admiral!   Posted: 4 months ago
The switch panel and wiring loom was made, tested and dry fitted a while ago and so it only needs securing to the bulkhead with four fixing screws, the two NiMh batteries were strapped down to the bearers with cable ties as close to the chines as possible and the XT60 connectors mated. I have read that placing the heavy batteries as far away from the keel as possible improves the handling, all other heavy items are centered along the keel for symmetry and should help the boat to sit evenly in the water. I’m not sure if I will need to do any ballasting, hopefully the maiden voyages should give me an indication. The prop shaft was greased and fitted, and with the prop, thrust washers and lock nuts in place, the clearance was adjusted and locked with some Loctite so the motor could then be installed. The initial motor alignment was made with a solid coupler which was then replaced with the universal joint, I took the precaution to grind a flat on the motor shaft so that the locking grub screw has better grip on the shaft. The grease tube was then fitted to the shaft clamp and secured to the side of the switch panel. The ESC was fixed to the back of the bulkhead with another couple of cable ties and the input cables, again XT60 types, and the three pole XT60 motor connectors mated. I have also fitted a Turnigy in-line volt, amp and watt meter in the circuit before the ESC so that I can log readings in case of spurious fuse blowing issues or unexpected battery life problems. The water cooling tubes were then run from the water pickup, through the ESC and then back to the transom ‘exhaust’ outlet, all water connections are fitted with spring clips to ensure water tight connections. I have used quite a large bore silicone tubing to ensure maximum water flow and made sure that all bends are kink and compression free. The R/C receiver is fixed to the rear cabin wall with some Velcro pads for easy removal, the two aerials were fitted in some plastic tubing at 90 degrees to each other as recommended for 2.4 gig systems and as high above the waterline as possible. The receiver is connected to a separate 4.8 volt NiMh battery via a changeover switch that also has a charging connection and LED power indicator, and I have also fitted a battery voltage indicator, just because they are cheap and convenient although the R/C system that I have has telemetry that reports RX voltage as standard. The battery charger I have chosen can handle the 16 cell series configuration of the drive batteries and so they can be charged in-situ when the main power switch is toggled over to the charge position. The RX and lighting batteries are charged separately. All of the servo and lighting switch cables are routed through the hull to the receiver through pre drilled holes in the bulkheads at high level for neatness and to retain the integrity of each compartment just in case 😲!!. The servo and cables and the water cooling tubes are strapped to a supporting bar between the bulkheads for neatness and security. With the TX switched on first, the RX is then powered up and the main power switch toggled to the ‘operate’ position, the ESC then gives a reassuring series of bleeps that confirm that all is well. The ESC was set up using a Turnigy programming card specifically for that model of controller and if required I can tweak the settings once the boat has had a few sailings. The last things to do now are to fit some strong magnets to hold the hatches and roofs down securely and then finally raise the RAF ensigns 😁

The Big Heavy Model Boat Launching Blues by Jerry Todd Commander   Posted: 4 months ago
Fully set up, I'm guessing Constellation weights between 100 and 110 pounds (I haven't had the opportunity the get an accurate measurement yet). Taking her to events with pools requires lifting her into the pool. I haven't figured out a way to do that easily, or safely, or more importantly, alone. I built her to sail in open water, so the 2 or three times I have to ask for help at a pool isn't a big deal. I'm sure that most of the time I'll be launching her at a ramp or shoreline, and that I'll need to move her from the parking area to the shoreline, however far that may be. There's times I may be faced with a bulkhead, but like the pool, there's no easy fix for that with a model this size. My first plan was a hand-truck set-up like the picture of my friend Ray from RCGroups, and his SC&H model of Surprise, a very similarly sized model to mine. The hand-truck is plastic and the cradle is wood, and you can see it's pretty bulky to hold a 100 pound model. Ray said his issue with it was it floated. When launching he had to push it down to get the model clear, and when retrieving he had to hold on to it or it would fall over, while trying get hold of a big model with spars sticking out everywhere. If the water was choppy or boaters were making wakes, it was that much more difficult. He also didn't like that he had to go into knee-deep water, at least. Dan, also from RCGroups, and the fellow that developed the sliding-brace-winch, has an SC&H brig he's modeled as the US brig Syren. It also came with the same hand-truck Ray's Surprise did. Dan wasn't all that enamored with it either. He pointed out how when you lean it back to move the model, it put you in among the rigging risking damage or even injury. Dan altered his hand-truck into a cart and has not looked back. In my mind, it's a boat. I have a 16 foot sailboat, and to move it, and launch it, I use a boat-trailer, so it would make sense to make a boat-trailer for the model. I scribbled an idea on paper, but then turned to some old 3D modeling software so I could see it better. My model has a 4 foot long ballast tube bolted to the keel. So I figured a U shaped channel to cradle that tube and support the model would be the basis of the cart. While Dan's cart has worked great for him, I didn't care for his 3-wheeled arrangement. Like an actual boat trailer, I opted for a single axle right under the model. I figured this would be more easily maneuvered and handle terrain a little better. I figured on making the cart from angle steel I dould bolt together. I over-designed the thing a bit, drawing a framework that would cradle the model that the more I looked at, the less I thought I needed. Going back to my real boat trailer, It just had center support and a pair of carpet cover skids (bunkers) to hold the boat up-right. Simple is always the best approach - and I had just the right material to build this cart from - a steel bed-frame. This L-angled steel had the strength to easily carry the model while using a minimum of material, and it certainly wasn't going to float! Two girders would form a U shaped channel to cradle the ballast tube. I figured a rod axle would need support or it could bend with a 100 pound model bouncing on it, a third angle would be set across for the axle. A couple of upright posts with padding would hold the model upright. Nearly all the weight of the model rests in the channel, so there's not a lot of strain on the uprights. I didn't have a cutting wheel so tried cutting the bed frame with a reciprocating saw. Bed frame steel is hard, it ate both blades, and two more I bought before finally getting the three main pieces cut, though I had no trouble drilling it. I used the u-bolt portion of a set of wire-clamps to hold the axle. A bit of flat steel to brace the axle so it wouldn't try to twist. It's all held together with nuts and bolts. I wanted short pieces of steel for and aft to hold the loose ends of the channel, but I wasn't gonna try to cut that stuff again, so I just used some scrap 2x4. To hold the handle I tried mounting a wood block with a hole forward, but then I remembered I had a flag-pole mount from when I replaced a rotten post on the porch. It took some searching, but I found it and screwed it on. The wheels are shopping cart wheels bought new from Ace Hardware online for about $5 each. I looked into inflatable wheels to give a softer ride, but they were too expensive for me. I watch the local thrift shops though, and if something shows up with nice wheels, I'll grab it. A fender washer goes on the axle first, so the wheel doesn't rub against the axle support; then the wheel, another washer, and a hitch-pin holds it all on. I can pull the hitch pins and remove the wheels making it easier to stow the cart. The uprights are simple 3/4" pine with some pipe insulation for padding (as opposed to tennis balls in the 3D model). They're bolted to the axle support, but I want to alter that a little so they can be folded in to make the cart flatter for transport. The handle is an old wood closet pole I've had for a long time. A bit too old it would turn out, but that's a later story. I painted it white for visibility as it also serves as a guard to protect the model's bowsprit from cell-phone wielding idiots that seem to be the most common form of life on this planet now. I painted the cart blue, because it wasn't black, white, or red; the other colors I had. Unfortunately, I wasn't ready in time to the museum event, and didn't go, but I wanted to sail the model before it got cold, and see if this thing worked.

Gentlemans Cruiser by muddy Captain   Posted: 4 months ago
Many Thanks Doug.. and ok about your saw, my hollowing out of bulkheads mainly concerns a ring saw as a typical electricial would have/use and the inverted jigsaw in the work-mate, the ring saw sets the internal radius, usually about 1" blade. Or a 3/8" drill into the bulkhead preferably close to the inner edge, and then using the jig saw, inverted.. I tend to use the metal work blades for the jigsaw, as they are a much thinner profile enabling tight radi to be tackled..Sea scout, now there a nice size boat , a blast from the past..Tnx for the info..Regards Muddy....