Float question for cub
04-16-2006 | 08:03 AM
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From: vienna, GA
Float question for cub
I have a GP 81 inch cub that I have just installed floats, I am having a real problem getting it on step the prop keeps getting in the water. The plane is balanced, I can balance it on my finger tips 4 in back of the leading edge. I just need tips and advise from you guys who are already doing it. Thanks in advance.
04-16-2006 | 01:59 PM
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RE: Float question for cub
You can put spray rails on the inner edge of the floats...just epoxy a strip of plywood on edge in the vacinity of the prop..this will catch the spray and deflect it away from the prop..
You should also ensure that you have at least 2" clearance between the tip of the prop and the floats..if not, you struts may be too short
I posted more info over on the Dave Patrick Super cub thread if yoiu are interested:
http://www.rcuniverse.com/forum/m_20...20/key_/tm.htm
Scroll down a ways..it is the fourth post from the bottom...
You should also ensure that you have at least 2" clearance between the tip of the prop and the floats..if not, you struts may be too short
I posted more info over on the Dave Patrick Super cub thread if yoiu are interested:
http://www.rcuniverse.com/forum/m_20...20/key_/tm.htm
Scroll down a ways..it is the fourth post from the bottom...
04-16-2006 | 03:15 PM
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From: Boise,
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RE: Float question for cub
You will have to set up the floats so that the step is about 1/2" or so behind the airplane's CG. My Goldberg Cub will just "rock" back and forth on the step when sitting on a level table, without fuel. You also need a few degrees positive angle of incidence between the floats and the cub's wing...sometimes after you position the floats in relation to the CG you will have to add or move weight to get it to "rock".....
Randy
Randy
04-16-2006 | 03:26 PM
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From: Boise,
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RE: Float question for cub
Over in the Seaplane forum there is a thread titled "float set-up and wing incidence" look at post #17 in that thread for an excellent description of float set-up....
04-19-2006 | 07:51 PM
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From: marshall,
WI
RE: Float question for cub
You do know that the take off is different than land planes!!!!!!
Hold full up elevator to cause the plane to rock back on the rear of the float/s and as more throttle and speed is gained ease off of the full up elevator to neutral and the will climb up on the step and really accelerate, a little up the time and it will lift off.
Technique will go a long way in getting into the air especially if you are useing a low powered a/c.
Or you can just horse it off with high horsepower and risk a snap roll on take off. A lot of guys do this and get away with doing this, but when it snaps they understand what happened. Saying Iv'e done this for years doesn't make it right!!!!!
Tom
Hold full up elevator to cause the plane to rock back on the rear of the float/s and as more throttle and speed is gained ease off of the full up elevator to neutral and the will climb up on the step and really accelerate, a little up the time and it will lift off.
Technique will go a long way in getting into the air especially if you are useing a low powered a/c.
Or you can just horse it off with high horsepower and risk a snap roll on take off. A lot of guys do this and get away with doing this, but when it snaps they understand what happened. Saying Iv'e done this for years doesn't make it right!!!!!
Tom
