.40 or .60 nitro engine???
12-23-2006 | 09:41 AM
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From: greendale,
IN
.40 or .60 nitro engine???
guys, need ur opinion on selecting nitro engine size .40-.60. the purpose is to use in airboat but i don't have any idea regarding airplane engine. lookin' for a cheaper probably below $100 but reliable engine, easy to tune, that enough to move a 31 inches hull weighing 5-6 lb...i saw alot engine in tower but can't decide which is which...any input is highly appreciated...thanks..
12-23-2006 | 09:56 AM
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From: FrederickMD
RE: .40 or .60 nitro engine???
Although not an authoritative answer, here's my take. I have a plane that weighs about 6 lbs on floats. The floats are 34 inches long. Its powered by a Thunder Tiger Pro 46 with a 11x5 prop. The prop strikes the water, but will launch the plane. I've also used a 10x7 prop with great success off the water. Now assuming you're not trying to fly, either of these combinations would probably overpower your boat. I definitely would stay away from the 60 size. You might even consder going smaller with a 28 or 35 size. Less weight to push around.
Brad
Brad
12-23-2006 | 10:38 AM
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From: pembroke pines,
FL
RE: .40 or .60 nitro engine???
yes, but airboats have a lot more drag than airplanes do, because your out of the th water most of the time, it would seem like a .46 will push it easily, but airboats are always in the water.
12-23-2006 | 10:38 AM
#4
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RE: .40 or .60 nitro engine???
why have you moved to another thread to repeat your questions?,my airboat is a flat bottomed hull it has a 46 la engine 11 "prop,more than enough power for that boat arround the same weight.yours is a tunnel design which should be faster id say stick to a 46 any will do but the ones with ball bearings are best.more expensive unless as i said you get the sc ones or similar priced ones like thunder tiger etc.os engines are very expensive and no better than sc in my book.my os 46 la has no barings but its a cheap reliable engine!!.the la ebgines are for trainers so they need to be reliable but they arent powerfull although should be ok for your boat for a bit of fun.i dont think a 61 is too big though it will certainly shift ,if it floats 
.check out this site see what everyone is running on theire tunnels.
[link]http://www.rc-airboats.com/gallery/[/link]
.check out this site see what everyone is running on theire tunnels.[link]http://www.rc-airboats.com/gallery/[/link]
12-23-2006 | 10:01 PM
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From: greendale,
IN
RE: .40 or .60 nitro engine???
ORIGINAL: martno1fan
why have you moved to another thread to repeat your questions?,my airboat is a flat bottomed hull it has a 46 la engine 11 "prop,more than enough power for that boat arround the same weight.yours is a tunnel design which should be faster id say stick to a 46 any will do but the ones with ball bearings are best.more expensive unless as i said you get the sc ones or similar priced ones like thunder tiger etc.os engines are very expensive and no better than sc in my book.my os 46 la has no barings but its a cheap reliable engine!!.the la ebgines are for trainers so they need to be reliable but they arent powerfull although should be ok for your boat for a bit of fun.i dont think a 61 is too big though it will certainly shift ,if it floats.check out this site see what everyone is running on theire tunnels.
[link]http://www.rc-airboats.com/gallery/[/link]
why have you moved to another thread to repeat your questions?,my airboat is a flat bottomed hull it has a 46 la engine 11 "prop,more than enough power for that boat arround the same weight.yours is a tunnel design which should be faster id say stick to a 46 any will do but the ones with ball bearings are best.more expensive unless as i said you get the sc ones or similar priced ones like thunder tiger etc.os engines are very expensive and no better than sc in my book.my os 46 la has no barings but its a cheap reliable engine!!.the la ebgines are for trainers so they need to be reliable but they arent powerfull although should be ok for your boat for a bit of fun.i dont think a 61 is too big though it will certainly shift ,if it floats
.check out this site see what everyone is running on theire tunnels.[link]http://www.rc-airboats.com/gallery/[/link]
12-24-2006 | 10:24 AM
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RE: .40 or .60 nitro engine???
hi sc is super custom ,made by a guy who used to build os engines and he uses the os moulds for these . i wouldnt pay for an os bb engine they are way too over priced in my opinion.im not sure where you would get the sc engines over there to be honest,they are very reasonable price wise and very strong engines too.id say get a 46 engine ,the thunder tiger engines are ok if thats what you can get easier.get an 11" prop for it or even a smaller 3 blade prop which as a freind says will get your engine lower and still give great power.ask where you buy the engine which one to get for best performance.good luck and happy xmas!!.
12-27-2006 | 08:36 AM
#8
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RE: .40 or .60 nitro engine???
buy it if you get a good deal they are good engines.a tip for you if your boat flips ,disconect fuel lines and turn the prop over with electric starter and open carb let all the water come out of carb dont stand in way or youll get wet!!,reconect fuel lines and start her up .this burns any water and stops it rusting,run a full tank through it after a dunking and she will be good as new.a spray of wd40 after doesnt hurt either,then you can add some after run oil in the carb too.
12-27-2006 | 10:03 AM
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From: blue rapids,
KS
RE: .40 or .60 nitro engine???
good idea martno1fan, but i think you forgot one thing. remove your glow plug before spinning the motor or you could bend or break the connecting rod. water does not compress like air/fuel mixture.
12-27-2006 | 11:19 AM
#10
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RE: .40 or .60 nitro engine???
oops too much xmas cheer or was it beer ,thanks for that !!mind you if he spins the prop a cpl of times by hand first and its not locked up he should be fine anyway but removing the plug is safer i guess.
,thanks for that !!mind you if he spins the prop a cpl of times by hand first and its not locked up he should be fine anyway but removing the plug is safer i guess.
12-27-2006 | 07:49 PM
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From: Glasgow, UNITED KINGDOM
RE: .40 or .60 nitro engine???
Hi i got a 40 on my tank air boat weighs 14Lbs lol
11" prop got the engine tuned bloddy thing wants to fly the engine i picked it up from e bay brand new for £10 well i am scottish lol
great place to get brand new engines very cheep use a sniper program
http://www.auctionsniper.com/ if you see a good engine you think that worth a bit use auction snipper places a bid 7 secs before the end and i have never lost yet lol
if you use it say i told you that way i get anther 3 free i have used all mine up lol [email protected]
11" prop got the engine tuned bloddy thing wants to fly the engine i picked it up from e bay brand new for £10 well i am scottish lol
great place to get brand new engines very cheep use a sniper program
http://www.auctionsniper.com/ if you see a good engine you think that worth a bit use auction snipper places a bid 7 secs before the end and i have never lost yet lol
if you use it say i told you that way i get anther 3 free i have used all mine up lol [email protected]
