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 2018: 5 people
September 2018: 13 people
August 2018: 5 people
July 2018: 8 people
June 2018: 8 people
May 2018: 7 people
April 2018: 24 people
March 2018: 13 people
February 2018: 8 people
January 2018: 9 people


Unique Visitors This Month

Website Members

Terms and Conditions
Privacy Policy
Advertising
Contact


Model Boats Website
Active Users (7)
Login or Register
To Remove This Ad

Login or Register
To Remove This Ad
>> Home > Tags > pulleys

pulleys
pulleys
Emerald - "Round the Word" ocean racing yacht. by East-RN Sub-Lieutenant   Posted: 3 months ago
Main Sheet Modification: Yachts of this nature, would be fitted with a Traveller, which would be used to help shape the Main Sail. Also, the route of the main sheet, has a lot of twists and turns to get out of the cabin and up to the Boom. Plus, it has to pass through the tube and bend at its edge. The starting point of the control would be from the cockpit, especially if it is a Single Handed yacht. The ideal place for the traveller, would be on the roof of the cabin. To keep physical disruption to a minimum, I decided to use the original boom running gear pulleys. The termination of the MainSheet would now be at the traveller on the cabin. 1. The cleat was removed from the cockpit, and the eye bolt was replaced by an S hook, screwed to the cockpit deck( see picture 1). 2. A hole was drilled in the cockpit, adjacent to the cabin hatch, and in a direct line with the main Sheet control system. This will allow the main Sheet to pass directly from the cleat. Through the pulley assembly (withought going round the pulley), and straight aft to the cockpit. 3. A brass tube was glued into the hole, flush with the cockpit surface and extending inside, towards the mainsheet control system (see pictures 1 and 2). 4. The Traveller was formed from a length of brass rod, (approx 300mm long), formed to the same curve as the cabin roof. Slide the pulley onto the rod so that it runs freely. Make a 90 degree bend at each end, the length of the traveller apart. These 2 legs will pass down into the cabin roof, leaving about 10 mm for the pulley to run from end to end. Plus about 10mm at each end of the rod, which will be bent up against the inside of the roof and glued. (see picture 3 & 4). 5. Mark the cabin roof where the traveller is to be mounted. I chose to mount the traveller directly under the boom pulley. I have made a revised sketch which is taken from the original plans for guidance. See picture 5. Note: make sure the pulley is mounted on the rod between the two bends. 6. Drill the holes in the cabin, pass the ends of the rod through the holes. I put a 10mm piece of wood under the traveller rod, next to the hole. This allows you to hold it securely, while you bend the rod out, on the inside of the cabin. Apply plent of glue or resin to secure it. Do the same at the other end of the rod, and leave to set. With the cockpit removed, and the mainsheet control system in place, take the free end of the main sheet and pass it through the new hole in the cockpit. The cockpit can be secured by the 4 locking pulleys. Now pass the mainsheet through the S hook and up to the boom. Adjust the S hook to suitable angle. When the yacht is rigged, the mainsheet is passed up to the end of the boom pulley, along the boom, over the pulley and down to the traveller pulley. With the tx/ex active, pull the mainsheet right in, and the trim set right out (this allows for final tightening).Secure the mainsheet to the eye of the pulley, ( I use a figure of 8 knot ). Now adjust the trim on the joystick to pull the main Sail tight. Finally, run the servo right out, and back in a few times, to make sure it works properly. Move the boat round so the wind cones from a different angle, and watch the traveller as the sail is pulled in and out. Now you are ready to sail. May your wake be long and straight. Ray 😎

Fitting Propshafts by RNinMunich Fleet Admiral!   Posted: 3 months ago
Mornin Ed, 1 to 1. Basically cos that's what I've got in those big nylon cogs. Want to use the nylon ones cos they are wide, so more freedom of movement aligning them, and they should be quieter than metal gears. Think they came from old printers! Bought a batch of assorted cogs and pulleys at a flea market here years ago. Now they're coming in handy😊 Main purpose is to get the drive down to the propshaft which is mounted very low down in the hull as can be seen in the pics above 😲 Cheers, Doug 😎

Spektrum, new, useless... by RNinMunich Fleet Admiral!   Posted: 4 months ago
Hi Martin, First your last question😉 "What DO you do with a 3rd channel?" Example: 5 foot destroyer! 1 Throttle. 2 Rudder 3 Gun rotation, servo and pulleys 4 Torpedo tube rotation, servo and pulleys 5 Smoke switch, servo and microswitch (Smoke could be linked to the ESC to free this channel for the ASDIC pinger!) 6 Split into four functions (by misusing the gear down lever on my Graupner MC-10😉) for Whoop whoop, Fog horn, searchlights and signal lights, NAV lights. All switched via a home brew decoder / switch board and 5V relays! Alles klar? 😉 Re the DX5e; If I were you I'd let a (supposedly?) Spektum trained guy look at it first. With luck he'll have a service manual or at least a circuit diagram, which I don't 🤔 and should know the binding procedure backwards. I could only do some rudimentary tests without the circuit diagram, and make some educated guesses. I could at least try binding it with a variety of Rxs, including my Spektrun RXs which all work faultlessly with my DX6. Up to you, will PM my address anyway. I could at least check, with a simple RF meter, if the damn thing is transmitting at all! Just thought - if you're going to smash it anyway ........ 😉😁 Cheers, Doug 😎 PS: 4th attempt at the prop shaft for the cutter also failed 😡 She just does not want to get her bum wet!! Too long 'on the shelf' 🤔

Charging NiMhs, one for Doug?... by RNinMunich Fleet Admiral!   Posted: 4 months ago
Evenin' Martin, Just back from 'nosh' with Gisela, my camera girl in the vid! She's mean like that too, keeps me hoppin' about like the proverbial cat on the proverbial hot stuff 😡 Can't wait to see the rotating teddy👍 Put a couple of mini Cam lenses in his eyeballs and you'll get a terrific 360° First Person View from the driving seat😁 Re Sea Scout, I took your advice and did the hull in Royal Blue (no navy knickers!😆) or what passes for that here. Anyway I'm pleased how she turned out. OK, I admit I accidentally turned her into a Sport Fishing Boat😁 She's 24" what scale do you think that makes her? I'm looking for crew figures and stuff to fit out the cockpit but I'm not sure what size to look for. I thought maybe 1/20 i.e. a 40 footer? Waddya think? Re Kako; while recently trying (fruitlessly🤔) to make space in the workshop (got two renovations on the go in parallel - saves getting the same tools, rattle cans an' stuff out twice!😁) I ran across the original Kakos and Mabuchis I used in my scratch 53" H class destroyer Hotspur in 1966. She ran off a 4.5V EverReady flat (form not volts😁) battery until Granny took pity and bought me some 6V Lantern batteries! I ran 'em up on a power supply and they turned but now sound like mini football rattles! Think they need new big end shells 😁 Jeez, how many guys under pension age have ever been down to the bitza bazaar looking for 50 thou oversize bearing shells and compression and oil control rings?? Pics show her Sea trials in Radnor Park pond, Folkestone, Kent, summer 1966. Sorry about the quality, only had a Box Brownie 127 in those days and could only afford Gratispool free B/W films🤔 Pentax? Canon? Sony? Not to mention Digital? HD? Wassat? 50 years on I got all three😉 I like Lupins too, preferably the blue and purple ones. BTW, for your steering guy's arms you don't need a separate RC function or channel! You just need a coupling from the rudder control to turn a pulley and cord which turns a suitably scaled pulley attached to the wheel axis. The arms are fixed to the wheel and go with it! Dead simple (to write anyway😁) and no lecktrickery! 😊 OR you could just put one of his hands on the wheel and the other on the throttle. Then use a 'Y' cable to split the ESC cable into two. Connect the second output to a servo which moves the throttle lever via a push-me-pull-you-rod, pulleys and cord or gears or whatever. Sure you can figure out the mechanics better than I. Whatever, have fun and don't electrocute yourself, keep your socks dry😉 Cheers, Doug 😎

Steep angled rudder shafts by onetenor Fleet Admiral!   Posted: 5 months ago
Bring it out like the old auto steering geared quadrant with the pulley combined with or connected to a spur gear engaged with the teeth on the quadrant.Two small swiveling/self aligning pulleys under the deck to allow both sides of the wires/cords to emerge through fairleads and take 2 turns round the pulley.Make sure the pulleys have deep grooves and close fitting shields or even totally enclosed to avoid the cord jumping off. The problem is keeping the gears engaged at the sharp angles involved.Perhaps some sort of flap hinge can be incorporated to allow the required movement

Steep angled rudder shafts by Westquay Fleet Admiral!   Posted: 5 months ago
Ron, there is nowhere near enough space for that and also the twisted arms would still move through a strange path. I have snakes, but they don't seem to work as well as the man suggested. So, I've ordered a universal joint in steel which fits a 4mm shaft. I will take a short bit of 4mm out of the top on which will be the arm I've made, but that will need a bearing (just thought of that as I typed) otherwise it will flop about all over the place. Damn! More space I haven't got. Looks like the pulley idea might be the only way of working it, but getting access to those pulleys would be very awkward. I have very little space back there. We're in the lazarette and that was bend double territory on the real boat. The only other way would be to actuate the tiller on deck, once again with pulleys. I'm making the tiller currently. I may have to look into a deck operated system, with the line coming out of the middle of the deck and then via a pulley on either bulwark. Cheers, Martin

Steep angled rudder shafts by onetenor Fleet Admiral!   Posted: 5 months ago
Cables and pulley(s) would likely be the way to go as per some full size systems. The cables running from servo arms out to Port and Starboard and running over pulleys then down to stern and over two more pulleys under the gunwales then to rudder arms. Using more pulleys as required. The servo arms being set fore and aft and swivel pulleys to change direction. I can't draw it on here but it is quite logical to follow. Good luck👍

Bristol pilot cutter mascotte by kmbcsecretary Fleet Admiral!   Posted: 6 months ago
Thanks hammer have used the heat shrink like that on a previous boat and i tend to use the grimb tubes for the nylon line. i did think of making the pulleys but just couldn't get my self motivated to do it. i have my next project ready for starting and thinking will have to make everything for this one.

Bristol pilot cutter mascotte by RNinMunich Fleet Admiral!   Posted: 6 months ago
I think you're right Ron 🤔 only just barely visible - a good argument for NOT painting it black! 😉 Fully understand with the pulleys - there are so many of them, would have done the same 👍 Keep up the good work, cheers Doug 😎

Bristol pilot cutter mascotte by RNinMunich Fleet Admiral!   Posted: 6 months ago
Way to go man!!! At the risk of becoming monotonous 🤓 Brilliant woodwork and fittings 👍 Did you make the pulleys yourself? Looks like stainless, if so Hat Off Sir 👍👍 PLEASE DON'T PAINT THAT LOVELY CLINKER BOAT!!😲 It would look Soooo good varnished to your usual standard, and I'm pretty sure from the photos of the original that only the canvas cover was blue. Surely the boat itself was varnished. More power to your rigging, Cheers Doug 😎

HMS HOOD by Trumpeter by RNinMunich Fleet Admiral!   Posted: 6 months ago
Even tastier with the Frankfurters, and Colemans Mustard I trust😜😋 Steve: I found a cheap way to mechanise the two aft turrets of my H class destroyer Hotspur, using one servo with a pulley, a couple of smaller pulleys on the turrets, about 2:1 ratio to give at least 180° rotation at the turrets, and a spring loaded nylon cord around the pulleys. I'll see if I can dismantle her over the weekend to make some pics. I plan to try something similar with my 1:350 Hood, also Trumpeter and also excellent detailing. Another way is to use one micro servo per turret, connected with Y cables if you want a synchronised Broadside; A+B and X+Y turret. Then use the servo travel adjustment at the TX to maximise the rotation. You can then move all four on one channel or two channels for 'Independent Firing" fore and aft. I will use the two pots at the top of the Turnigy i6 TX for this. On Hotspur I used the left stick left/right. I plan to do this in my Graf Spee, Belfast, Hood and Bismarck. Maybe also the ack ack turrets on Ark Royal!? Will knock up some test jigs sometime 🤓 Cheers Doug 😎

Sidewinder by ronrees Sub-Lieutenant   Posted: 9 months ago
[Score: 10/10] 16"/600g Sidewinder Capable of 10mph and a runtime of 40mins Single Propellor (2 Blade S Type 35mm) Powered by LiPoly (7.4v) 3Amp/h Batteries - Comments: Another of my Foam hulled, own designs using an own design Azipod thruster with B/L motor submerged and running in water. Steering by sail winch servo via geared pulleys, can rotate unit 360 degrees. Hope to put build write up in MB mag. Wierd model that turns in its own length and is powerful enough to clear the weeds on the pond (and break ice!)

rotating radars off mast by RNinMunich Fleet Admiral!   Posted: 12 months ago
Hi Seafarer, a few basic questions! Mast for what boat/ship? Dimensions / pic or sketch of the mast? Space for drive motors/gears/pulleys etc? Hint: for the radar on my 1:72 destroyer I used an old servo; disconnected the feedback, and removed the mechanical end stops so it rotated continuously and drove it with a single 1.5V dry cell (alkaline), lasts for years😉 But in my case the scanner aerial sat on the director tower on the bridge, not on a mast, so simple direct drive coupled to the servo (hidden in the ridge) output shaft with shrink sleeve. Does a sweep in a little under one second. What type of radar are you trying to simulate? Cheers Doug 😎

M.V. TEAKWOOD by RHBaker Fleet Admiral!   Posted: 12 months ago
The only remaining area requiring significant rework was the bow. Decided now to concentrate on getting the shape and dimensions correct. Made a template from a steel wire coat hangar, shaped to follow the Teakwood bow profile. Cut a mating recess in the upper bow and bulwark, fitted the template into it using CA glue. Once fitted and relatively rigid, cut a piece of styrene to fit into the space between the hull and the template. Epoxied the styrene into place at both the template and to original Velarde hull bow profile. This gave a nice looking bow from the side elevation, one that is also strong. Unfortunately, when viewed from the underside, the usual nice smooth water entry is not apparent. Had two ideas to attempt to blend the bow into the hull sides properly. The first was to cover this transition area with thin styrene and then feather it into the bow and the hull. The second was to use the modelers secret weapon, wood filler and do the same. After either approach planned to cover the whole area in thin glass-fibre cloth and sand down until smooth. Mocked up the styrene installation and decided to abandon the idea. The styrene makes the bow transition bulky, it also became quite clumsy around the upper area. Thought would try the wood filler approach instead. Shaped the rough filler with sand paper, it worked out relatively easily as it required little rubbing down. The modification worked out well and the bow looks satisfactory from both the side and underside. Decided also to replace the pulley drive arrangement with a toothed belt system. Have never tried this before and, as a friend of mine had a selection of belts and pulleys, thought would be useful experience to try it. One question perhaps somebody can help me with – what colour was the deck on this vessel? All my pictures showing the deck are in black and white!

Decks by RNinMunich Fleet Admiral!   Posted: 1 year ago
👍 Don't forget the pulleys at the end!