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-   -   rc boat nitro to b/l conversion (https://www.rctech.net/forum/rc-boating/531029-rc-boat-nitro-b-l-conversion.html)

R0GU3ST4TUS 07-09-2011 01:29 PM

rc boat nitro to b/l conversion
 
4 Attachment(s)
I have a nitro boat im wondering how and what parts to use for a b/l conversion. Its 41" long and currently running a k&b .45 nitro engine. Ive been in the rc hobby for about 12 years now and have some knowledge about electric motors, but have no idea what size to use or kv kw rating and mount up, esc batteries, etc. i want this boat to be fast on the cheap. As it sits now it seems way too slow for my taste, and the nitro motor cuts out too much. im finally getting around to making a recovery boat out of a nitro vee i changed to electric. ive been looking into a few motors and such but what is the best combo for a boat this big. i guess weight would be an issue too. so just wonderin what you guys think. btw has any one heard or bandit boats or seen this model before ive looked around the net and havent found much.

roadrashracing2 07-10-2011 12:57 PM

Its possible but I don't think its going to be cheap and fast.

R0GU3ST4TUS 07-10-2011 01:37 PM

[url]http://www.nitrorcx.com/77p-lbp5692-3d-1340kv.html[/url]
 
ive been looking at leopard motors what would be a good kv kw rating for that size of boat.. and yeah the research ive done doent look like it will be cheap.. but why wouldnt it be fast.. also wondering if you attach flex shaft directly to motor by way of collet. or need a trans in there. it looks like ill buy piece by piece.. maybe something like this for a motor.. . how to mount it is another problem

roadrashracing2 07-10-2011 03:02 PM

I belong to this forum, you should get some better answers:
http://forums.offshoreelectrics.com/forum.php

MrUnlimited 07-11-2011 02:41 AM

It is possible but you hae to remove the engine and radio box. Then you need to clean the inside of the hull. I recommend to use a 40 size brushless motor with a 3/16 coupler for a 5mm motorshaft. Your current hardware is fine but you need to waterpoof the hatch using waterproof tape like this: http://cgi.ebay.com/Aquacraft-1-2-Wa...item5199eb8bc5

R0GU3ST4TUS 07-11-2011 05:59 PM

a 40 series motor just seems too small.. what kind of speed would i see with that and a a good prop combo.. also how do i pair motor and esc.

ron1950 08-14-2011 04:04 AM

leopard
 
i run a leopard 4074 2200kv in a pursuit with a turnegy 180 amp esc etti cap bank for heat reduction and it runs high 40;s....its a real good inexpencive way to get some speed :batman:....if 40mm is too small try the 5692 1090kv on 8 cell......its quit a bit more expencive that way and prob no faster u would just be able to use bigger props and bigger esc.....

leo_home 10-06-2011 03:46 PM

Low KV value is an advantage, once saw some 800KV motor. High torque low rpm increase the propulsion efficiency.

losifiend 10-06-2011 07:20 PM

800KV would require high voltage though, 8-10S. A Swordfish HV ESC should handle that but they aren't cheap. I think they're like $250 over at OSE

Rusty Old Fart 10-07-2011 03:56 AM


Originally Posted by R0GU3ST4TUS (Post 9366163)
I have a nitro boat im wondering how and what parts to use for a b/l conversion. Its 41" long and currently running a k&b .45 nitro engine. Ive been in the rc hobby for about 12 years now and have some knowledge about electric motors, but have no idea what size to use or kv kw rating and mount up, esc batteries, etc. i want this boat to be fast on the cheap. As it sits now it seems way too slow for my taste, and the nitro motor cuts out too much. im finally getting around to making a recovery boat out of a nitro vee i changed to electric. ive been looking into a few motors and such but what is the best combo for a boat this big. i guess weight would be an issue too. so just wonderin what you guys think. btw has any one heard or bandit boats or seen this model before ive looked around the net and havent found much.


This is completely achievable of course you can.

Motor....my suggestion CC1717 1580kv on 6S2P and there is still some around. Or a Leopard 4082 1600kv on 6S2P or outrunner Scorpion

ESC would be nothing less than a T180A from HK

or a swordfish 200A from rcboat bitz (remember to WProof the ESC).

Have a go you know you want too

leo_home 10-07-2011 06:58 AM


Originally Posted by losifiend (Post 9750181)
800KV would require high voltage though, 8-10S. A Swordfish HV ESC should handle that but they aren't cheap. I think they're like $250 over at OSE

Yes. High voltage low current is also an advantage. Less electrical power lost.

wild248man 12-07-2011 08:35 PM

i also converted my nitro over to brusless but mine is an outboard motor. i made and adaptor plate..i was wondering if anyone has issues with overheating of the wires. i melted the solder twice on my esc for the connectors.

MrUnlimited 12-08-2011 01:22 AM


Originally Posted by wild248man (Post 10010200)
i also converted my nitro over to brusless but mine is an outboard motor. i made and adaptor plate..i was wondering if anyone has issues with overheating of the wires. i melted the solder twice on my esc for the connectors.

What motor/esc are you using? What connectors, size of wire, prop size?


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