GP Piper Cub .60 with a gas engine???
02-10-2011 | 04:57 PM
#1
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GP Piper Cub .60 with a gas engine???
I have a Great Planes .60 size cub kit that I will be building in the near future. I was wanting to use a gas engine instead of the 2 & 4 cycles. I know it's overkill but I like gas engines. Don't want to go 1/4 scale, want to stay more around the 1/5 scale. Any suggestions on what engine would be a good one?
02-10-2011 | 08:19 PM
#2
RE: GP Piper Cub .60 with a gas engine???
maybe a 15cc eng like the one that just sold in the market place
http://www.rcuniverse.com/market/item.cfm?itemId=719869
you will have to look at your planes and measure from the firwall to the front opening of the cowl. to make sure its not to long.
if it is your best bet with that size cub is a four stroke 70 or 90. a 70 would be plenty. to much engine and you would tear the plane apart in not time. remember its a scale type plane. also the front of the firewall and behind it would have to be renforced. with some aircrat ply. it might be to much truble.. but 15cc is the bigest i would go that would fly a 1/4 scal cub no problem.
Hopefully someone has done it already here and could help you better
try youtube on 15cc gas rc and see what the have them in
http://www.rcuniverse.com/market/item.cfm?itemId=719869
you will have to look at your planes and measure from the firwall to the front opening of the cowl. to make sure its not to long.
if it is your best bet with that size cub is a four stroke 70 or 90. a 70 would be plenty. to much engine and you would tear the plane apart in not time. remember its a scale type plane. also the front of the firewall and behind it would have to be renforced. with some aircrat ply. it might be to much truble.. but 15cc is the bigest i would go that would fly a 1/4 scal cub no problem.
Hopefully someone has done it already here and could help you better
try youtube on 15cc gas rc and see what the have them in
02-11-2011 | 09:21 AM
#3
My Feedback: (2)
RE: GP Piper Cub .60 with a gas engine???
Joe,
My father-in-law had a GP 81" ARF cub with a .71 OS 4 stroke in it. We were beginners at the time. We had three different club members try to take the cub off. Out of 4 take offs only one was sucessfull, and that one was really ugly. Most simply did a wing over into the runway. Finally after we has repaired it three times one of the best pilots took it off with no problems at all. All he said was that with a big engine on a Cub you needed to fly it off the runway not to horse it off as soon as the tail came up. I flew it after that with no problems. I just waited while it gathered speed and gradually the tail would rise - leave it on the ground another 50 feet or so and do a shallow realistic take off. These were very pretty to see. So why am I replying to you.
Simple. If you put a big motor in a cub use some throttle control and wait a little on takeoff until after the tail rises or it will bite you.
John
My father-in-law had a GP 81" ARF cub with a .71 OS 4 stroke in it. We were beginners at the time. We had three different club members try to take the cub off. Out of 4 take offs only one was sucessfull, and that one was really ugly. Most simply did a wing over into the runway. Finally after we has repaired it three times one of the best pilots took it off with no problems at all. All he said was that with a big engine on a Cub you needed to fly it off the runway not to horse it off as soon as the tail came up. I flew it after that with no problems. I just waited while it gathered speed and gradually the tail would rise - leave it on the ground another 50 feet or so and do a shallow realistic take off. These were very pretty to see. So why am I replying to you.
Simple. If you put a big motor in a cub use some throttle control and wait a little on takeoff until after the tail rises or it will bite you.
John
