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>> Home > Tags > power boat

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Sunset sailing by Gregg Fleet Admiral!   Posted: 5 days 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: 20 days 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 Sub-Lieutenant   Posted: 20 days 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: 24 days 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😎

Darby One Design hydro... by Westquay Fleet Admiral!   Posted: 24 days ago
Dave , I made it. I found plans in a 1954 copy of the Motor Boat Annual I borrowed from the National Powerboat Museum at Pitsea, before the stupid bastards on the council threw it away in preference for mud huts for snotty nosed brats to go mad in. Only today I finally got some pictures from the Oulton Broad club with pics of the Darby boasts I hadn't seen, which show that the top cowling was always built a little higher than the plans show, so I shall be making some slight changes to the fixed portions. The photos show the fixed sections to be done with stringers and fabric, a la aeroplane fuselage. You can't buy decent older powerboats as kits or ready mades. Nobody gives a toss about speedboat models in this country, alas. Even though we had a very busy world of inboard race boats at one time. Now, all is boring outboards. The 1500 cc inboard classes gave us a lot of great racing just pre and post-War. Here are three in one race. "WHO'S DARBY?", Dawn, a Whippet class and Miss Windermere, another One design, like the Oulton Broad One design, all three are 1500 cc class boats. There wqere also boats of under 950cc and even a Singer Cadet class with a Singer Le Mans 1100 cc engine. The Singer Commodore had a 6 cylinder 1500, a gorgeous engine. Both Singers were designed by Percy See at Shoreham and had diagonal reverse clinker construction. I have plans if anyone is interested. Cheers, Martin

BRAVE BORDERER by jbkiwi Sub-Lieutenant   Posted: 25 days ago
Just put up another vid showing the speed at around 2/3 throttle which looks reasonably scale for 38 knots (bit hard to scale water movement as we all know!) and it doesn't squeal too much at this speed. Just been back through my old info on the ESCs and found I may be able to change a few things (forgot due to approaching dotage and so many projects on electric (18 planes as well converted from ic to electric) I was thinking with your high kv motors that if you can get away with smaller props or some the scale diam bit finer pitch props, that would allow the motors to rev how they should, but give you finer control. As I mentioned before, on 8v per motor they will spin at around 16-18000 rpm and won't like a big load (you've no doubt heard those delta wings scream) . My props are 28mm x 3 blade on a 2000kv motor and are spinning at around 12000 rpm (probably around 8000 rpm in the vid at 2/3 throttle) The general rule with brushless is the higher the kv the smaller the prop/pitch and vice versa planes or boats (would also apply to brushed) If you have an in line amp meter/batt checker you can check the amps drawn in the water at full power (have someone hold the boat) and see if you are under max A for the motor. You can then prop to suit if necessary. This is the only way to check for correct load and is an absolute must for aeroplanes. After a run, motors should be around cool to almost too hot to touch (60-70deg C) There are backplate water cooling units available for using out-runners in boats if necessary eg pic.

ASR 64 ft RNZAF HSL W1. R/C vid 3 by jbkiwi Sub-Lieutenant   Posted: 25 days ago
British Power Boat 64 ft RNZAF HSL scratch built 36" R/C model with twin systems including sound. Brushless 2000kv w/cooled (pump) in-runners, 30A car ESCs, 2200mah 2s LiPos remote lights etc. Started off in 1940, new with the RNZAF and had many modifications over the years till decommissioned, including machinery reduced to twin 671 Greymarine GMs (from the original 3x 500hp Napier Sea Lions) which were finally removed around 7yrs ago and replaced with a single 650hp GM Detroit 8v92T1 (still does 20 knots in its latest configuration ! - see this on the photo gallery of this model) This boat is in far better condition than the ex Phil Clabburn restoration of HSL 102 (he didn't have much to start with) and the hull has never had any major rebuild apart from being glassed to the W/L. Even today there is no way most people would pick it for 80yrs old. Those hulls never age! (ie some of the beautiful 'Whale Back' conversions still around)

Hobby Engine Factory Tug Motors by pittsfieldpete Lieutenant   Posted: 27 days ago
Hello: I have a Hobby Engine “premium” 2.4GHz “Richardson” tug. This boat is identical mechanically to the “Southampton” tug. I’ve read many posts on the forum having to do with replacing the factory-installed motor/gearbox unit with two separate motors mounted side by side. Personally I’m happy with the factory drive setup; it’s quite powerful & it runs smoothly. The reduction gearing is a bit noisy, but my boat is new & will likely quiet down with use. I have two requests for those who have removed the factory drive unit & replaced it with separate motors: 1. If you’ve still got your factory drive unit & have taken it apart out of curiosity, if possible will you please post photos of the internal parts? I’m interested in seeing what’s inside the housing & how the gearing is set up. 2. Along the same vein, I’d like to acquire a spare factory drive to have on hand, just in case. If you have a complete, working drive unit that you’d consider offering for sale, please send a PM to me & let me know what you would want for a price. Thanks very much. Pete

ASR 64ft R/C VID 2 by jbkiwi Sub-Lieutenant   Posted: 27 days ago
Boat is Scratch built 36" British Power Boat 64ft High Speed ASR Launch which belonged to the RNZAF. The launch was one of the 22 built and was shipped to NZ in 1940. It was the only one of its type in the Southern Hemisphere. Model has twin motors, ESCs, sound units etc. Has remotely switched water pump for water cooled brushless 2000kv in runner motors and remotely switched lighting. Uses 2x 2200mah 2s LiPos for drive and 1 1800mah LiPo for the pump (also a separate battery for the LED lights. Boat is built with strip planked balsa on ply frame and fiber glassed. Deck is ply, wheelhouse is varnished balsa. The colour is as it was for most of its time in the RNZAF . Took about 5 years on and off to build and finished it last year. (please ignore the time date - can't get rid of it .

HMS BRAVE BORDERER by Lyle Sub-Lieutenant   Posted: 28 days ago
I suggest you go to one of my old reports on my 48 inch Crash boat by Lyle G. The issue is most likely t5hat asn it is a MODEL it needs some extra support in full size water . A model thus NEEDS the advantage of planing strakes at the vertical hull and lower hull joint as it is a "Hard Chine design " and you may need to widen with an extra strake WIDTH though it can be thinned in its vertical configuration as it is blend into the forward hull skin. The wider chine is the secret of the MGB's Torpedo Boats the Elco's and the Higgins and the BPBoat design . Though I live in the colony of Oz I have the British Power boat 41 foot 6 inch model at 48 inches , the Vosper Fast patrol boat , the Range Safety Launch , The BPB co Whaleback at 36 inches and the Black Maurader and even the Sea Queen and ALL I/Combustion powered and all over 15 to 20 years young and ALL as well as the Keilcraft 48 inch Cras Boat all all all have this trick and all get up on the plane as the "Brave class" with its Proteus engineer was still a planing Hard Chine hull and as such it is the hull chine strakes that are so essential to the design originated by was it Georga Selman ? and Hubert Scott Payne ?. Oldies are goodies and the masters of old need to be never forgotten for their skills. Regards Lyle and best construction wishes for modifications.

Nomenclature... by RNinMunich Fleet Admiral!   Posted: 28 days ago
Hi John, think somehow you've got the wrong end of the stick!🤔 All BECs are Battery Eliminator Circuits of one sort or another. The objective is to eliminate the separate receiver battery, sometimes necessary purely to save weight and/or space in small models. If you do that then the RX power must come from the main drive battery, which then has to supply all RX functions; servos, switched lights etc etc. Personally, if the boat / ship can carry it, I prefer to use drive batteries for just that and use separate battery for the RX and special functions. Some of which, like smokers for instance can be current gobblers. Cheers, Doug 😎 PS If you ever find a way of eliminating all batteries and still get the RX to work and the boat to move PATENT IT QUICK!! 😁 Cheers, Doug 😎 Hmmm! Maybe a raft towed behind with an array of hi-current solar panels!? 😁😁 Years ago in my work in NAVAL COMMS systems I once suggested to a shipbuilder, who was complaining about the number of antennas needed, to put some of them on a raft behind the ship 😉 Now they are doing just that with antenna buoys from submerged submarines! No credits 🤔 ... SIGH 😉

HMS BRAVE BORDERER by boaty Admiral   Posted: 28 days ago
It is correct that brushless motors don't modulate as smoothly as brushed. I have had the same problem but now I only use brushless on my fast electrics. 3s lipos do put out a lot of power and as Brave Borderer is a scale model it could be that the speed exceeds the limitations of the hull thus when running on 2s it is more stable. Boaty😋

BRAVE BORDERER by jbkiwi Sub-Lieutenant   Posted: 28 days ago
I've used small brass shafts in brass bushed tubes with oilers in my MTB and they've lasted for 20yrs of average use, although they get a bit noisy when short of oil. Best would be brass shafts in brass tubes with Teflon/Nylon/ bronze etc bushes (a center bush as well if poss - have used these in ic power boats for years with hard steel shafts for the power). Brass is good as it's self lubricating to a degree and with a good quality oil can run quite smoothly and quietly, and is very simple, and when looked after won't corrode like steel or miniature ball or roller bearings (unless stainless).

EarlyVosper M.T.B by Simplas by boaty Admiral   Posted: 30 days ago
Hi Onetenor Fuji 15 was a good glow engine which I don't think it is manufactured any more. Aero version max B.H.P was just below .40 when tested. If it was in a model aircraft it would have been around .20 to .25 depending on prop size which was good then for a small capacity glowplug . Marine versions when on the water put out a little less and the water cooled jacket was never as efficient as the finned cylinder jacket of the aero version. My two Aerokits boats, the Sea Commander and the Crash Tender are powered by single Speed 600 motors running on either 8.4 or 9.6 volt Ni Mh batteries. Performance is equal to that of marine diesel power such as the 2.46 Ed Racer and D.C 2.46 Rapier, the latter I used to watch in the fast steering events in the early 1960s at Fleetwood and Coronation Park in Crosby just outside Liverpool. Taycol powered versions would be obviously slower due to the additional weight were far more reliable and you did not have to put up with injuries from excessive use of a starting cord with kids watching and "extracting the urine" shouting "why wont it go mister". Boaty

S.H.Grainger Formula Powerboat by thatsinkinfeelin18 Petty Officer   Posted: 1 month ago
sorry meant saga32👍