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>> Home > Tags > power boat

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Proximity (Hall effect) sensor wiring by RNinMunich Fleet Admiral!   Posted: 14 days ago
Absolutely Steve 👍 Alternative is to make a holder for the magnet to prevent it getting knocked off by weeds etc. Also agree that any Failsafe' circuits must have an independent power supply. Place to put the switch, or latching relay, is definitely in place of the little slide switch usually supplied on the ESC. Just checked on some of my ESCs, Graupner and mTroniks, the red lead to the switch is NOT connected to the red lead supplying the RX and servos via the built in BEC. Guess the switch just triggers an FET switch inside the ESC. So the normal 500mA limit of reed switches will be enough. If a latching relay is used make sure the pull-in current is less than 500mA. Have fun All, cheers, Doug 😎 Eric; which sub is your mate building? I have a Type 1A U-Boat dynamic diver, speed and planes only, and a kit for an Akula 2 which will be a static diver, with tank etc.

Boat shaft connectors (which stuffs to use and which is good) by DodgyGeezer Lieutenant   Posted: 22 days ago
1 - I concur with figtree7nts. You don't want a long length of unsupported floppy tube transmitting power. You will see that my illustrations show the unsupported tube to be very short. 2 - You also want thick tube to transmit power. if you have thin 2-3mm tube that will easily kink. I make my own connectors at the ends of each shaft to bring the internal tube diameter up to about 6-8mm. 3 - If you want to try a quick fix for what you have, I would suggest putting a small piece of wood or plastic inside the unsupported section of your tube, which will stop it collapsing when it is twisted. This may work if the torque is not high. And it's a quick, cheap thing to try. 4 - if you want to try making your own, you could get something like this - check the correct shaft size - https://www.ebay.co.uk/itm/Brass-Hexagon-Flexible-Coupling-C... or this: https://www.ebay.co.uk/itm/Coupling-Inserts-for-RC-Models-Va... and then buy a length of something like this - https://www.ebay.co.uk/itm/1M-Food-Grade-Clear-Translucent-S... checking the diameters that you need, of course... Here is a similar Eezebilt to your craft. It's the OSA Missile boat. You can see that the unsupported length of silicone is short, and this boat at 32 inches takes quite a lot of power...

RNZAF W1 by jbkiwi Commander   Posted: 24 days ago
[Score: 5/10] 36"/2900g RNZAF W1 Capable of 10mph and a runtime of 40mins Twin Propellors (3 Blade 25mm) Direct Drive to a TGY 28/45 2000KV INRUNNER (3 Blade) Powered by LiPoly (7.4v) 2Amp/h Batteries Controlled Through CHINA (5Amps) ESC - Comments: 36" Scratch built model of RNZAF W1, a British Power Boat 64ft HSL. Has twin brushless motors, twin ESCs, twin sound units, water cooling pump, full lighting and r/c switches for lights and pump. Took approx 5 yrs to buid on and off. hull is strip planked and f/glassed, deck is ply, wheel house is balsa.

Proboat Sonicwake by boaty Admiral   Posted: 25 days ago
Three weeks ago I got a Proboat Sonicwake deep V fast electric. This appears to be a replacement for their previous model Vorocity. Very interesting self righting method with a water tank on the port side, slots in the deck and a large exit point at the stern. Idea is that if it capsizes, water will enter through the slots and as it draws the boat under, the air trapped in the hull will self right it. If the boat is stationary in the water, it will list to port due to water entering through the stern outlet and when power is applied it will empty out. Bit scary to watch at first as I thought the boat was on its way to Davy Jones. I use waterproof marine clear tape to seal around the hatch ever time I use it. The quality of the hull raises a few concerns. This relates to its ABS construction as the vast majority of similar boats at that price are made of fibreglass which is much more rigid and would be more suitable for the high speeds. Makers claim it does 50 MPH plus on 6S lipos. The electrics however are excellent with the exception of the external quality of the Horizon Hobby STX2 TX which looks a bit "toyish". For myself, this is not relevant as I replace all my wheel TXs with the "stick type" and I found that the Futaba T2HR fulfils all requirements and worked well when I sailed the boat. I have not yet changed the stock prop for an Octura one, the latter works great on my Blackjack 29 with a noticeable increase in performance. The motor is a Dynamite Marine W.C brushless 1900 KV with a 120 amp W.C ESC . 😁😋 Boaty.

Proboat UL19 by boaty Admiral   Posted: 26 days ago
Just had a new Proboat UL19 Hydroplane delivered. Has anyone had any experience with one. It says 4 to 6S lipo but it mentions not to run flat out all the time on 6S and advises to reduce power in the turn to save the electrics overheating. Never had this info with my Backjack 29 and new Sonic Wake as both don't overheat when at full throttle. For some reason the UL19 has a larger prop fitted than the two other boats and the Blackjack has an Octura prop which I got from Prestwich Model Boats and goes very well. The motor in the UL19 is the same as the one in the Blackjack. My theory is that as the UL19 is a hydroplane which when set up is heavier at the bow and will need an extra burst of power to get it up on the plane. Boaty😁

British Power Boats 64ft HSL by jbkiwi Commander   Posted: 26 days ago
Just trying out the maneuverability of the twin system. First trial so not too precise.

Tarpon hardware help by RNinMunich Fleet Admiral!   Posted: 29 days ago
Hi Gordon, "the boat is to be a present for my son. He works abroad for long periods and I reckon a lead acid would go flat beyond recovery." In that case an SLA (especially the types produced to power alarm and emergency lighting systems) would be your best bet. They can be left on trickle charge indefinitely. Two 6V in series might be better than one 12V to help with trimming out the boat. I use a pair of 6V 3Ah (about 600gm each) in my 135cm destroyer and 107cm submarine. They run for hours if I don't keep the pedal to the metal all the time. 😉 Back home I stick 'em on the trickle charger and leave 'em until the next outing. They've lasted my several years so far. Much longer than my NiMhs. An NiMh looses approx 1% of it's charge per day. So, assuming it starts fully charged, in 3 months or less it would be in Deep Discharge and have joined the Dodos😭 Cheers, Doug 😎

A577 by colindavies Sub-Lieutenant   Posted: 1 month ago
[Score: 5/10] 20"/700g A577 - Comments: This model belongs to a friend of mine who had this in his attic where it got damaged and its condition deteriorated, he asked me if I would refurbish it. This is a static model and I have submitted this to help to show the variety of craft that the RAF Marine Branch operated in the 68 years of its existence. The Armoured Target Boat was the brainchild of the Air Ministry's "I've had a good idea" Department. The requirement was for a target boat that could be bombed from the air with practice bombs. The 40ft Armoured Target Boats were developed from the slightly smaller 37.5ft ATBs which had been designed by Scott-Paine and others at British Power Boat in 1932. A couple of years later, in 1934, whilst bringing the first of the 64ft HSLs into service, it was realised by the Air Ministry that the condition of the aircraft had been advancing and that it was necessary to provide additional protection to improve the first type of Armoured Target Boats (the 37.5ft type). T.E. Shaw suggested to Scott-Paine that he should increase the length of the 37.5ft type to 40ft and fit twin rudders. In addition the Air Ministry prepared a new armour plating arrangement which gave separate protection for the crew and engines and coxswain. There was a further alteration to the forward bulkhead which resulted in it being changed to vertical instead of raked fore and aft to overcome the new conditions for bombing. A long series of trials were carried out with the ballast with the 40ft type launch and eventually it was approved. The 40ft thus became the standard type Armoured Target Boat (ATB). The first batch of 15 craft of the 40ft type were ordered in 1935 with further batches being ordered in 1936, 1937 and 1938. A further addition was the introduction of a 3rd engine, this helped to maintain a good speed on the ranges, and helped to counterbalance the the boat as it had been found that in a tight turn the 37.5ft ATB had a tendency to roll over.

Ashes the scratch built Motor Torpedo Boat by Sakibian Sub-Lieutenant   Posted: 1 month ago
I found this hull at thingiverse last year. I printed the hull from a local shop and rest was handmade. Firstly I bought a 2426 4200kv brushless 2-3s which was too powerful and too heavy for the boat size. The length is 38cm. And the 30Amp esc was also too big for it's size. After that I tried small 180 brushed motor with 20A brushed esc w/brake. It was perfect (still it's heavy😂). The bridge and deck is made by 1.75mm pvc,torpedos are made of wooden pencil. Small battery space takes a 2s 500mah lipo. 30mm 3blade propeller. YouTube video link is here: https://youtu.be/KZdmZ8_Z0IE

Brushless motors (again) by Haverlock Fleet Admiral!   Posted: 2 months ago
depending upon the type of motor cooling it can be a problem. Most brushless motors are out runners so the case rotates! In runners are usually for higher speed applications (or driving a gearbox). If you have an idea as to the size of IC engine the boat was intended to have then this list may be a help .049 or .051 = 100 watts 0.10 = 200 watts 0.15 = 300 watts 0.25 = 500 watts 0.32 = 640 watts 0.40 = 800 watts 0.45 = 900 watts 0.51 = 1020 watts 0.61 = 1220 watts 0.75 = 1500 watts 0.91 = 1820 watts Since Watts are Volts * Amps ( I know this is not accurate for a reactive load like an electric motor but its a rule of thumb) This gives you a ball park next point is the KV ( revs per volt) of a motor. The higher the KV the smaller the prop. Finally buy a Watt meter they are not expensive and give you a chance to " fine tune" a setup. https://www.ebay.co.uk/itm/FT08-RC-150A-Hight-Precision-Watt... Car ESCs ( usually) have a reverse function while the airplane versions do not. They are generally cheaper than boat specific ESCs.

34" RAF Crash Tender Windows by RNinMunich Fleet Admiral!   Posted: 2 months ago
Correct Colin, 👍 BRITISH POWERBOAT COMPANY 64ft HIGH SPEED LAUNCH TYPE 1. 1936 - 1947. http://www.rafboats.co.uk/gallery/102/ Cheers, Doug 😎

Sunset sailing by Gregg Fleet Admiral!   Posted: 2 months ago
Our club recently held a sunset sailing session, its surprising how a cheap set of battery powered lights from a pound shop can add yet another world to r/c boat sailing, so why not have a go at your club too, great fun cheap to do and once finished, you can remove the lights ready for regular sailing.

solar by lesliebreame Admiral   Posted: 3 months ago
Members might like to view my experimental solar powered "BOAT " More like an aircraft carrier !! No batteries carried even for the radio. Brushless motor running from 24 cells giving 12volts. Slightest shadow will stop it.The panel i made myself by buying individual solar cells from Ebay and soldering them up.The cells are sandwiched between glass which makes it quite heavy and next project will have no glass but the cells are VERY fragile.

W1 by jbkiwi Commander   Posted: 3 months ago
Thanks for the kind comments. Planking did take a couple of days but was not done all that neatly (just clamp and cyno) as I was glassing it later - it was all thin resin coated inside to seal it). Planking was just a hint at the original so you could just make out the planks through the glass. Have included a few more pics of the motors and interior which is not that flash but is unseen, (more for the fact that I had seen the original and was sort of putting down what I remembered from when I was 15) There is a small picture at the top left of the stairs which on the original, was a Photo from an HSL looking off the Stbd rear 1/4, to 2 64ft HSLs side by side climbing over its wake at speed The stair set is the original from the wheelhouse to wardroom, which has been kept and used again by the present owner (down to utility room in front of engine room) and still has the original 'POWER BOAT' rubber treads (not bad nick for 79yrs old!)

Darby One Design hydro... by boaty Admiral   Posted: 3 months ago
Very true, there isint a lot of interest in speedboats today. I remember some great ones when I was a child in the late 1950s and early 60s. I once saw an Albatross on a lake in Scarborough that was towing a water skier in 1959. I believe that is was made of aluminium instead of wood but it did have an inboard engine. . Another one I remember was the Dowty Turbocraft powered by a water jet driven by an inboard petrol engine . This was on the Southport Marine lake in 1961 and attracted a lot of spectators. It is up to us as model makers to keep the memories alive by what we build and sail. Boaty😎