Primed with white primer and will sand most of this away again. Please note boat is for semi-scale racing. the bow strakes have been reduced as per the real boat bow and perhaps allowing for some shark teeth details to be add as per one of the two original boats P285
Added a flexi drive, after fining out they were permissible in the rules of our semi-scale racing it came from a spare boat and a rudder to the transom (not allowed to have extended rudders or surface drives) I picked a rudder on the transom also because I had a spare one kicking around (save some money) and I have had trouble with water ingress with rudder tubes at higher speeds. Also added trim tabs to the transom and a servo for the rudder. primed the superstructure and added a locking screw (plastic) to hold it in place.
Two vessel in it class (1) HMS Scimitar (2) HMS Sabre Launched: December 1992 Displacement: 24,000 kg Builder: Portsmouth Armament: 2 × General purpose machine guns (stern-mounted) Complement: 7 (1 officer, 6 ratings) Gibraltar Squadron's two Scimitar-class boats are the smallest commissioned vessels in the Royal Navy. This build was to produce a fun semi scale racing boat, I have always liked the Archer class boats cabin design. So after finding a suitable hull, an old 'Models by Design' GRP moulding I was away with the rest of the build. Striped out all old fittings and remnants removed excess glue. Added strakes to the hull to add lift for planning and control. Produced a semi scale deck and cabin from light ply. Thanks for your interest Roy
Installed hardware used brushless 2860 4050kv motor with water-cooled mount and jacket, kept prop-shaft at a low angle. It drives really well to the extent that its too good to race so I have started again with another boat for racing.
[Score: 8/10] 24"/2300g RAF ASR 1942 Capable of 15mph and a runtime of 5mins Single Propellor (3 Blade 35mm) Direct Drive to a 2860 4050kv (3 Blade) Powered by LiPoly (7.4v) 3Amp/h Batteries Controlled Through China water cooled 60A (30Amps) ESC - Comments: This kit is based on an RAF ASRL Boat and is formed of High Impact Styrene for you to add your own hardware and detail. Kit includes Hull/deck/superstructure/windscreen/clear gun covers/dinghy/boat stand/servo, motor mount and instructions. Approx Length 24in x 7in 1/35th scale. HSL100 Type 2 High Speed Launch 63 feet 21.5 tons 39 Knots 1941 built by The British Power Boat Company and popularly known as the 'Whaleback' as the cabin looks like a whale diving. The craft operating in the North Sea / English Channel. Their armament consisted of any weapon which the crew could find, they started with a single 303 in each ball turret and progressed to twin 303's
Thanks for advise. The new shaft I bought (aluminium tube & skeg with steel shaft has an aluminium dog setup) I thought it would be best to use it, otherwise it means using a normal prop on a short thread as don't have thread cutting equipment. I looked at Cornwall MB but their sizes start at 35mm.
My Father made a Wherry see attached pictures. There is a lot of research required for an accurate model, note the sail winch has to swing out of the way for the mast to fold down, the real mast is counter balanced so it can be raised and lowered. Also note a Wherry is never painted green! The keel and weight distribution can help the forward mast position and a tendency for the bow to be low in the water on models. My Dad also made a large scale version which was displayed outside of the Norfolk Wherry Museum
Vosper Fire Boat (Crash Tender) a Vintage Aerokits Model 1:16 scale and is 34 inches long, produced from 1950's to 1970's. This model uses a Vintage Ripmax Bullet 30 DC motor that can run on 24v here it is only on 14.4v it becomes lively on 16.8v.
Model undergoing sea trials after painting, note rudders are too aggressive. Command Boat 90 (CB90) Stridsbåt 90 H is a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet. Speed: 40 knots (74 km/h) Draught: 0.8 m (2 ft 7 in) Length: 15.9 m (52 ft) Overall; 14.9 (48') Waterline Builders: Dockstavarvet Complement: 3 plus up to 21 troops and equipment Armament: 3 × Browning M2HB machine guns; 1 × Mk 19 grenade launcher; 4 naval mines or 6 depth charges
CB90 Model boat, 52 inches long performing 360 degree rotation on its own axis. The Combat Boat 90 (CB90) is a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet. Powered by two 9.6v Graupner 700 turbo motors (no-longer in production). Two Mtroniks Viper Marine 25 is a Brushed Speed Control designed specifically for use in RC model boats, it has a 25Amp motor limit and has proportional forwards and reverse functions
Skinned the frames added deck and splash rail also started on cabin and superstructure, added rudder and installed twin brushed Graupner 600 motors via Graupner style direct couplings. Motor mounting system through a bulkhead gives extra support to motors which mount on to end of the shafts. currently adding a rudder servo mount, as rudder is a close copy of the real boat's and still functional.
[Score: 9/10] 34"/2500g RAF Fireboat (vintage) Aero Capable of 12mph and a runtime of 40mins Single Propellor (2 Blade X Type 45mm) Direct Drive to a Bullet 30 (2 Blade X Type) Powered by LiPoly (11.1v) 5Amp/h Batteries Controlled Through 24v 15A Electronize (15Amps) ESC - Comments: Ebay job £50 Old Vintage Aero kit 34in Fire boat needing a lot of attention, with delaminating plywood, old glue, old glow-plug engine mounts with electric conversion, and after removing a metal shield I discover an vintage (1970,s Ripmax Bullet 30 Motor the dogs bollocks of electric racing of its time capable of running 24v at 15A. 300W for a brushed motor. Started by revamp rear pit by lowering servo and rudder and building sub deck, storage lockers, tow hook and ladders. Remount the motor with an aluminium mount with custom screw positions. Block windows with 1mm ply. Foam front half of hull to make unsinkable. Make centre decking area. Repair and build up on cabin roofs and walls to centre deck. Rewire add ESC and servo. Remove broken and unusable fittings such as large vents, some missing unable to match again. Problems with old gloss paint crazing the modern spay paints. Build some fittings eg Water cannons, life belts, Build new battery trays, Painting the boat now in progress as of 20/04/2018 Boat has be roughly painted but is not finished, as fittings are now required, added a RC system an gave it a test run. the performance was adequate on 14.4v and great on 17.2v see latter pictures on the pond. the motor did get hot after about half hour of use. the motor is rated at 24v but I think a smaller prop will be required for that voltage. Excellent performance from a brushed motor. Added some stickers and I have now added a 12v fan and ventilation between cabins as the motor required some cooling and was in a sealed compartment.
[Score: 4/10] 12"/500g Jet Boat Capable of 5mph and a runtime of 15mins Single Propellor (2 Blade S Type 20mm) Direct Drive to a 20mm (2 Blade S Type) Powered by LiPoly (7.4v) 1Amp/h Batteries - Comments: Modified from standard 360 motor to a brushless 20mm motor this was my first brushless conversion back in 2013.
1. Added strakes to bow used a rectangle section of styrene as more flexible. 2. Brought a motor mount (cooled) but may also add a jacket. 3. Painted cabin will need to redo as paint cover was poor. 4. Looking to find the best brushless motor for the job, remembering these boat race on 7.4v 3300mah batteries fo 5-6 mins. That gives a ruff consumption of 33 Amps which means the motor need to be able to handle about 250Watts. I have pick out 4 to test 1. 2850 2650 kv, 800W, max 19v, max 52A. 2. 2860 4050 kv, 1300W,max 12v, max 108A. 3. 3650 3930 kv, 800W, max 13v, max 60A. 4. 2845 3100 kv, 800W, max 17v, max 47A. On paper it should be between 1. and 3., 3 being the most suited ???. So on paper motor 3. running 7.4v will give 450 watts max at (60A max current at 13v) so 7.4v should have a max a round 30A (unless stalled). giving 222W 244.2 watts target at 7.4v = 33A max for 6 mins on a 3.3ah battery if battery function is good. 33A drain will depend on the propeller size 32mm- 45mm ! A safety margin may be 30A when moving and 33A in bath. 7.4v x 3930kv = 29,082 rpm perfect for hydro, not for sub drive.
[Score: 5/10] 17"/1000g WL 915 Capable of 15mph and a runtime of 10mins Single Propellor (2 Blade X Type 30mm) Direct Drive to a outrunner (2 Blade X Type) Powered by LiPoly (11.1v) 1Amp/h Batteries Controlled Through unknown (30Amps) ESC - Comments: WL 915 ready to run Brushless 2.4GHz RTR Electric RC Speed Boat. This RC boat is capable of reaching speeds up to 25MPH and anti-capsizing technology? The flood chamber in this boat causes the boat to struggle to get up on the plane, in the end I filled it with foam, and put in a new rudder offset to the right, it now goes well, and I haven't flipped it yet! Features: •Electric Powered •Capable Of Up To 25MPH? •2.4GHz Transmitter •11.1V 1200mAh LiPo Rechargeable Battery •Balance Charger Specifications: •Length: 17.25 Inches •Width: 6.8 Inches •Height: 4.7 Inches I will be modifying this little boat as it has a few annoying problems they are: 1. The flood chamber fills quickly and once full hampers the boat in accelerating and getting on the plane. 2. You cannot run the boat slowly as the flood chamber fills 3. The self righting is not 100 percent reliable. 4. Binding is initially difficult Mods a. Replace cabin so boat lies flat when inverted. so able to use rudder extension to steer when upside-down. b. Racing rudder side position out of prop-wash and aids torque effects. c. Fill float chamber with foam so gets on the plane quickly. d. Cut down rudder as too long (95mm) to 65mm. The cabin will be finished and painted properly after testing. On testing the rudder was reduced and performed well once it got going but still have problems getting it up on a plan it feel this could be a balance issue, needs more mass at the stern.
[Score: 9/10] 28"/1800g NDQ Modified Capable of 12mph and a runtime of 10mins Twin Propellors (3 Blade 30mm) Direct Drive to a BL 2845 2600kv (3 Blade) Powered by LiPoly (11.1v) 3Amp/h Batteries Controlled Through 30A gerneric (30Amps) ESC - Comments: NDQ cheap hull, ripped out radio replaced motors with brushless 2845 2600kv add rudder/ servo, trim tabs and turn fins also added strakes to the underside, foamed the hull to make it unsinkable add radio link radio modified to control both motors 2845 2600kv via SimonK firmware developed for drones brushless escs ( both motors run at same speed) 30A. Boat currently pulls enough to get hot motors on 3s (240W total).
Connect rudder to the mounted servo, servo box completed and glued into position, servo was mounted this way to leave the max height for rudder tube, as stern of the boat is narrow and when on the plane will be deep in the water. also the servo could be glued to the hull and the internal frame. Part of coupling attached, waiting for the motor! Also note some strengthening around the frame base, with right angled scrap. Reused cutaway plastic to make an inner sealed hatch this will be stuck down with ice hockey tape.
HSL100 Type 2 High Speed Launch 63 feet 21.5 tons 39 Knots 1941 built by The British Power Boat Company and popularly known as the 'Whaleback' (as the cabin looks like a whale diving). The craft operating in the North Sea / English Channel. Their armament consisted of any weapon which the crew could find, they started of with a single 303 in each ball turret and progressed to twin 303's, also some had two paired 303's on twin mounting posts and a 20mm on the rear deck where the life raft was originally. Between the 15th July 1940 and October Britain lost 215, hard to replace, pilots and aircrew to the seas. Thus in February 1941, with the motto "The sea shall not have them".The Air Sea Rescue Services (ASRS) were created, which later became the RAF Search and Rescue Force. :- 122 63ft BRITISH POWER BOAT HSL WHALEBACK 123 63ft BRITISH POWER BOAT HSL WHALEBACK 124 63ft BRITISH POWER BOAT HSL WHALEBACK 125 63ft BRITISH POWER BOAT HSL WHALEBACK 126 63ft BRITISH POWER BOAT HSL WHALEBACK 127 63ft BRITISH POWER BOAT HSL WHALEBACK 128 63ft BRITISH POWER BOAT HSL WHALEBACK 129 63ft BRITISH POWER BOAT HSL WHALEBACK 130 63ft BRITISH POWER BOAT HSL WHALEBACK 131 63ft BRITISH POWER BOAT HSL WHALEBACK 132 63ft BRITISH POWER BOAT HSL WHALEBACK 133 63ft BRITISH POWER BOAT HSL WHALEBACK 134 63ft BRITISH POWER BOAT HSL WHALEBACK 135 63ft BRITISH POWER BOAT HSL WHALEBACK 136 63ft BRITISH POWER BOAT HSL WHALEBACK 137 63ft BRITISH POWER BOAT HSL WHALEBACK 138 63ft BRITISH POWER BOAT HSL WHALEBACK 139 63ft BRITISH POWER BOAT HSL WHALEBACK 140 63ft BRITISH POWER BOAT HSL WHALEBACK 141 63ft BRITISH POWER BOAT HSL WHALEBACK 142 63ft BRITISH POWER BOAT HSL WHALEBACK 143 63ft BRITISH POWER BOAT HSL WHALEBACK 144 63ft BRITISH POWER BOAT HSL WHALEBACK 145 63ft BRITISH POWER BOAT HSL WHALEBACK 146 63ft BRITISH POWER BOAT HSL WHALEBACK 147 63ft BRITISH POWER BOAT HSL WHALEBACK 148 63ft BRITISH POWER BOAT HSL WHALEBACK 149 63ft BRITISH POWER BOAT HSL WHALEBACK - 156 63ft BRITISH POWER BOAT HSL WHALEBACK 157 63ft BRITISH POWER BOAT HSL WHALEBACK 158 63ft BRITISH POWER BOAT HSL WHALEBACK 159 63ft BRITISH POWER BOAT HSL WHALEBACK 161 63ft BRITISH POWER BOAT HSL WHALEBACK 162 63ft BRITISH POWER BOAT HSL WHALEBACK 163 63ft BRITISH POWER BOAT HSL WHALEBACK 164 63ft BRITISH POWER BOAT HSL WHALEBACK 165 63ft BRITISH POWER BOAT HSL WHALEBACK 166 63ft BRITISH POWER BOAT HSL WHALEBACK 168 63ft BRITISH POWER BOAT HSL WHALEBACK 169 63ft BRITISH POWER BOAT HSL WHALEBACK 171 63ft BRITISH POWER BOAT HSL WHALEBACK 172 63ft BRITISH POWER BOAT HSL WHALEBACK 173 63ft BRITISH POWER BOAT HSL WHALEBACK 174 63ft BRITISH POWER BOAT HSL WHALEBACK 175 63ft BRITISH POWER BOAT HSL WHALEBACK 176 63ft BRITISH POWER BOAT HSL WHALEBACK 177 63ft BRITISH POWER BOAT HSL WHALEBACK 178 63ft BRITISH POWER BOAT HSL WHALEBACK 179 63ft BRITISH POWER BOAT HSL WHALEBACK 180 63ft BRITISH POWER BOAT HSL WHALEBACK 181 63ft BRITISH POWER BOAT HSL WHALEBACK 182 63ft BRITISH POWER BOAT HSL WHALEBACK 183 63ft BRITISH POWER BOAT HSL WHALEBACK 185 63ft BRITISH POWER BOAT HSL WHALEBACK 186 63ft BRITISH POWER BOAT HSL WHALEBACK 187 63ft BRITISH POWER BOAT HSL WHALEBACK 188 63ft BRITISH POWER BOAT HSL WHALEBACK 189 63ft BRITISH POWER BOAT HSL WHALEBACK 190 63ft BRITISH POWER BOAT HSL WHALEBACK - 2250 63ft BRITISH POWER BOAT HSL WHALEBACK - 2546 63ft BRITISH POWER BOAT HSL WHALEBACK 2547 63ft BRITISH POWER BOAT HSL WHALEBACK 2548 63ft BRITISH POWER BOAT HSL WHALEBACK 2549 63ft BRITISH POWER BOAT HSL WHALEBACK 2550 63ft BRITISH POWER BOAT HSL WHALEBACK 2551 63ft BRITISH POWER BOAT HSL WHALEBACK By the end of WWII more than 8,000 aircrew and 5,000 civilians had been rescued by the service. The role of aircraft in the ASRS was to locate downed airmen and help them, by dropping them survival equipment and stores, while they waited for an ASRS launch to pick them up.
Added rudder and water cooling pic-up and exit port today. Please note added strakes to underside of hull this is to force water under the boat, as vacuum formed hulls like this have curved chines which can cause the hull to be held back by the suction of the water. Also added some details such as hatches, and hand-rail effect to the cabin and painted it (stage 1) and also constructed a smaller servo cradle than the one provided.
Senseless Brushless 2650KV Motor running on 7.4v for 5-6 mins racing consumption need to be around 35A (3300mah battery) 0.0225 ohms coil resistance not relevant when running. 18Vmax will be running at 7.4v 1.4A off load current 52A max current I am looking for a start point, I was hoping a 35mm 1.4 would be ok ? Thanks . Would like suggestions of propeller size diameter / pitch.
[Score: 5/10] 40"/5000g Grimmershorn II Capable of 7mph and a runtime of 60mins Single Propellor (3 Blade 70mm) Direct Drive to a 950 (3 Blade) Powered by Lead Acid (12v) 12Amp/h Batteries Controlled Through 15A 24v (5Amps) ESC - Comments: The Motor vessel 'Grimmershorn' was built in 1956/57 by Hansa Stahlund Schiffbau GmbH at Koln-Deutz for the Waterways and Shipping Administration at Cuxhaven.Her Daimler-Benz four stroke diesel engine had an output of 500hp. permitting a speed of 11.5 knots. The model hull and deck are vacuum formed ABS, timber work of precision cut ply, 2 full size plan sheets and a construction manual along with a fittings pack complete this kit. Technical Data Scale: 1:20 Length: 1038mm Beam 305mm The Grimmershorn was the second major kit I purchased from a model shop on the outskirts of Harlow in Essex back in the 1980s. The Krik kit is still produced and sold today. My build was a slow and lost enthusiasm so after completing the hull, deck, motor and bow thruster installation I gave the boat to my father in-law who completed the superstructure and sailed the boat for a while, eventually the boat was given back to me when the father in-law moved house. I then repaired the rudder, added a moving radar, a adjustable water cannon and pump also various extra fittings such as a detailed life raft and crane, buoys and captain figure. thus renamed the boat as Grimmershorn II a Search and rescue fire boat.
Plastic Model Boat Kit WW2 British Air Sea Rescue Launch made of vacuum formed styrene approximately Length 24″ x 7″ 1/35th semi-scale. https://www.sarikhobbies.com/product/ww2-british-air-sea-res... The Darlington & District Model Boat Club races semi scale craft being either a pleasure craft or military craft, between 22 and 34 inches long using a 7.4v 3300mah battery, but no racing gear apart from trim tabs. Construction is simple but the kit looked more like PT9 than a Whaleback due to the open fore cabin, which I enclosed with scrap styrene sheet. Note PT 9 was delivered to America by the British Power Boat Company and served as the blueprint for the development of the PT boats of the USA. To keep the boat as wide and strong as possible I didn't follow the instructions and cut the internal ribs after attaching the deck for a better fit, also cut a rib away for the battery to fit on far port side. (counter torque) and reinforce the sides of the craft with some 5mm square strips of styrene purchased separately along with some triangular running strakes under the hull.
The Real Boat has jet drives, but unfortunately the little 20mm ones on the NDQ boat would not move a 52in version shown, there are larger jet dives for models available from Germany but it would cost a lot more than my budget would allow. I did try to make some but they were unsuccessful. I have seen them fitted to other smaller CB90's but the crash stop looks pathetic. and jet dives are not very efficient. I would love to take a trip on a real one! I've just found a plastic kit version by Tiger Here's a YouTube link to an unboxing:- https://www.youtube.com/watch?v=Fr5xGoMjBlI