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>> Home > Tags > lipo

lipo
lipo
Fireboat and Sunderland together again by pmdevlin Fleet Admiral!   Posted: 17 hours ago
yes its me! Dynam Catalina with 2200mah 3 cell lipo, gets about 8 to 10 mins flight time, here with the tide out and me trying my best to land on a puddle! https://www.youtube.com/watch?v=jxefbO2ucow&t=1s available in a lot of rc model (plane) shops, and more so online, motors esc etc all preinstalled, you just need to add rx and batt and fly (after some essential easy mods!) https://www.rcgroups.com/forums/showthread.php?1455058-Dynam...

What is this boat ????? by canabus Admiral   Posted: 1 day ago
Hi Dave M Pics as required, one Sea Hornet 28mm brushless motor 1700kv, 3S Lipo 2650mah and a 2 blade 32mm prop. Canabus

What is this boat ????? by Dave M Fleet Admiral!   Posted: 2 days ago
Looks like an early Aerokits Sea Hornet. http://lesromodels.co.uk/product/aerokits-sea-hornet/. The construction suggests a model from the 1960/70s, are you sure it's fibreglass, the hull shows wood? Would look stunning when restored with say a 35xx or 42xx brushless coupled with a 35/40mm prop 100amp ESC and 11.1/14.8 LiPo. Make sure you find a few model figures to add realism. A build blog would be welcome, please. Good luck

Fusing confusion by wunwinglo Chief Petty Officer   Posted: 9 days ago
Hi Crew! I could do with some help with fuse ratings for my MTB restoration. It was built in the mid-50's for i.c. power and has not seen its bottom wet since 1962. Needless to say, it now has a couple of brushless motors plus a lipo pack , ESC's and a sound system. I am about to put the fusing in but am concerned about the initial start point for the fuse capacity. I do not mind burning fuses to achieve the level required but where would be a good starting point? This is by far the most potent power train I have experienced and I do not want to torch a family heirloom.... The setup is as follows: Motors - 2 x EnErG 600D/R 1550 ( C35-14) pulling about 42 amps max. ESC's - 2 x Hawk BL 50A on 2 x lipo cells BEC employed Over to you Wunwinglo

The Vosper 46” RAF Crash Tender Kit By Vintage Model Works by jarvo Fleet Admiral!   Posted: 9 days ago
Hi Mate and welcome to the forum, (mad as hatters!!!) I have built the 46" and before you get to far in you need to decide if your having single or twin motors, and rudders, that way you dont fall foul of bulkheads, and shaft mountings, mine has Graupner 700bb motors on 3s lipos, but i am up-grading them to brushless soon, have the new ESC,s and the motors are on order. Great model to build and sail, attracts a lot of attention. Mark

Aerokits fire boat 35" by kevgermany Petty Officer   Posted: 13 days ago
I' doing somehthing very similar, rebuilding one from the 60s, when I get time to finish it. I picked up a Brushless outrunner, Robbe/Roxxy Outrunner 4240/10 - is this about right? - Will it be OK with a 4S/5000mAh lipo? - What prop would you suggest to start with?

Prop Size by cormorant Fleet Admiral!   Posted: 16 days ago
Whenever I have asked the question, "I have this size motor to run this size boat, which prop size shall I use?", I am led into the dark science of thrust, pitch, voltage, RPM and many other mysterious forces. The discussion always seems to conclude with "Suck it and see." I have a Turnigy D3536/9 910kv out runner which I want to use in an airboat length 750mm x 300mm beam. The manufacturer recommends a 12x5 prop @ 7.4v and a 10x7 @ 14.8v. I use 11.1v 3cell lipos and cannot find the recommended prop for this voltage. Have any of you knowledgeable fellows any suggestions please? (Apart from the one mentioned above of course.) Thank you. Steve

Sea Queen Water Line by Dave M Fleet Admiral!   Posted: 30 days ago
Andy The original model was produced in the early 1960s when IC engines were the norm and scale and RC for sailing models were in their early development stages. Supplies were limited and we made do with whatever was available. The plans were typically sheet on frame, probably plywood from an old tea chest and cascamite resin glue ( it was water proof and slow setting). The designer would suggest suitable wood to use but many chose to use what they could acquire and as a result the finished models often finished up heavy or very heavy. Coupled with the large IC engine and flywheel and large heavy RC escarpments and big drycell batteries, it is not surprising that the hulls sat well in the water. To the modellers of the period the waterline really didn't matter as we were after speed, control and endurance. This may explain why the early plans did not show a waterline, as in my experience the draught varied greatly between models. Today we have scale plans and supplies that allow us to build true replicas and all the important detail is a must for a true scale model. Personally as an ex flyer I try and build lite, bricks tend to fall or sink, and my Sea Queen rides high in the water with a slight bow up. A 42xx brushless and LiPo add little weight and I have two 8oz lumps of lead in the stern section to achieve this. If it looks right, sails well and you are happy, then enjoy your model.

Classic by Tica Sub-Lieutenant   Posted: 1 month ago
[Score: 9/10] 22"/1000g Classic Single Propellor (3 Blade 30mm) Direct Drive to a Graupner Compact 260Z 1380KV (3 Blade) Powered by LiPoly (7.4v) 2Amp/h Batteries Controlled Through Graupner 18A (10Amps) ESC - Comments: This is a aero-naut Classic and I would say that it's a second revision, as there has been changed several items, compared with the one my wife build 3 years ago. 1: The wind shield is now fixed in slots in the deck and not just glued to the edge of the cockpit opening. 2: There are now padding and leather for the seat included. 3: There are a few etched details for the instrumentation, steering wheel and step plates for the deck. 4: There are notches at the break off parts that will help in fixing the sides when gluing them in place. I used the same set-up as my wife's which is: Graupner BL Compact 260Z 1380KV with a Graupne ESC 18A FWD and REV. The shaft is replaced with a Robbe 4mm (no 1442) as the one provided is a flimsy part that will not withstand the motor set-up. Prop is a 33mm Graupner racing item. It will be running on LiPo 2S but if one need a rocket it can run on 3S. Great fun to build and performs great on the water

Moving onwards by Skydive130 Fleet Admiral!   Posted: 1 month ago
Hull formers in and setting. Duct finished and primed ready to recieve VW brilliant orange from a Halfords rattle can. Im scrapping the Depron cabin and making the sides from 1mm ply/2mm balsa lamination for extra strength. Not worried about the extra weight as on Palaforms site you can get a liteply cabin conversion. Infact, Im not too worried about the extra weight that will be added in the build as the manual does state that it maybe required to add extra weight in the form of a battery or similar for on water use in a breeze to prevent the craft flipping over. I shall be saving weight with my motor, esc, lipo combo anyway.

SeaSpray by pjarrett Petty Officer   Posted: 1 month ago
[Score: 8/10] 38"/5000g SeaSpray Capable of 12mph and a runtime of 20mins Single Propellor (2 Blade S Type 35mm) Direct Drive to a MFA 850 (2 Blade S Type) Powered by LiPoly (11.1v) 6Amp/h Batteries - Comments: Purchased as kit around 1972, fibre glass hull with ply deck and superstructure. Had many changes and refits over the years and was originally fitted with and OS Marine glow engine which gave good performance and was quiet! Changed to the MFA electric motor with ESC. Installed two LiPo batteries which makes the hull well balanced and allows the deep V hull design to plane as designed. Have designed and made two electro-magnetic lifting sticks which help me raise and lower the boat into the water. Age related launching aid!

850 Brushless by canabus Admiral   Posted: 1 month ago
Hi Andy Slightly more power with a brushless motor is a no go!!! Brushless motors the same size are far more powerful !!! But, the about same RPM a Turnigy L5055-700kv(500 rpm more on a 4S(14.8 volts) Lipo battery would be a good replacement. Mind you at 1600 watts( about 2 and 1/4 HP) these will used in a large boat like a 46" Vosper Crash Tender or a 46" Sea Queen!!! My move into brushless motors I have found that they are 7 to 10 times more powerful and equal to, if not better than the old IC motors!!! My Sea Hornet, Sea Commander and Huntsman run brushless motors . My Crash Tender is getting the 5055 motor, so it will be interesting to see what it will go like!!

850 Brushless by RNinMunich Fleet Admiral!   Posted: 1 month ago
Hi Andy, what you might call a FAQ!! Have a look at the info here to help filter the plethora of motor specs and find something close to the MFA850 performance - or better as the brushless motors are more powerful size for size and LiPo batteries much lighter. http://www.thercmodelboatforum.com/t1234-brushed-to-brushles... As a guide here is a table of the Graupner brushless specs for you to compare with the 850 spec. There is no conversion table as such, especially since with many brushless and ESCs you can alter the performance by adjusting timing at the ESC! Turbo!! Happy hunting, cheers Doug 😎

Sea Queen Spray Rails by Dave M Fleet Admiral!   Posted: 2 months ago
Yes you do need to fit. Can't remember the exact size but about 1/8" square should suffice. I fixed mine with epoxy and cocktail sticks pushed thro a hole drilled in the rail and hull. Make sure you seal well once finished as any water will be under pressure at speed and will find the smallest of holes! The pic of mine shows the rail just above the joint on the side skins rising slightly at the front. This was an after fit as the water was filling the cockpit at speed. Position is not too important but my model is light (brushless + LiPo) and sits high in the water. If your model floats lower you may need to fit slightly higher, its really the bit that's out of the water when planing that needs to deflect the spray.

Fairey Huntsman & Swordsman by jarvo Fleet Admiral!   Posted: 2 months ago
Hi Andy, I have 'twined both the 34" and the 48" Huntsman, i used 600 size motors in the 34, and 850 motors in the 48. Both were very quick, but, the run time was poor, about 10 mins. With modern lipo's or big Nimh batteries they would be a lot longer especially if you used brushless motors. Props, on the 34, they were 35mm x 3 blade brass, on the 48, they were 45mm x 3 blade brass. Sad but i sold them some years ago but now have a 48" fireboat to play with. Mark