reliableflyer
Registered User
Seldovia, Alaska
I have recently sold my cub which I have had for more than 40 years and purchased a J-3 C65 with a
C-90. I have an 80 X 34 Catto on it. It has been converted to PA-11 configuration including wing tanks and removal of the nose tank as required by the STC and is soloed from the front seat. This was done many years ago. It has a pacer balanced tail also with vg's under the tail. The wing is metal with 18 flaps, vg's and Stewart tips and of course wing tanks for the pa11 conversion. It also has the CubCrafter header less fuel system.
The empty CG weight falls in the center of the range specified in the type certificate. With the wings off, the aircraft balances on the lifting fitting at the front spar location. Trim range is about 28 or 30 turns stop to stop. The v on the jack screw yolk is pointing down and the horizontal cross tube touches the longeron on the bottom and the yolk touches the frame brace on the top. I have Full trim range.
Measuring the the movement of the horizontal stabilizer I have within hundredths of an inch on both up and down position on the horizontals as compared to a new Carbon Cub which is being built here. The carbon cub has approximately 28 degrees up deflection with full up elevator and I have 33 degrees full up elevator..
Problem is that while I have full trim range and all is well with two notches of flaps, full flaps require full forward trim and forward stick pressure during a three point landing. It is the slowest landing cub I have ever flown but there is no reserve for additional elevator. Seems to make little difrence even when I have weight aft.
I am am speculating that the full flaps move the center of lift aft and I simply run out is elevator power on a very slow full stall landing. I am looking for a set of pa18 horizontals and ailerons and hope that they will be able to provide the additional elevator power required. If any one knows of a set available please advise.
I have never ever flown the zero thrust mod and read the recent discussion with interest and wondered of that would have any bearing on this issue. This cub was built to existing configuration in the 90's and I don't remember when the zero thrust angle became popular and I don't know if this cub has it or not.
if anybody has had any experience with overly powerful flaps or lack of elevator effectiveness or other thoughts on this issue I would be interested in hearing your thoughts.
stu
C-90. I have an 80 X 34 Catto on it. It has been converted to PA-11 configuration including wing tanks and removal of the nose tank as required by the STC and is soloed from the front seat. This was done many years ago. It has a pacer balanced tail also with vg's under the tail. The wing is metal with 18 flaps, vg's and Stewart tips and of course wing tanks for the pa11 conversion. It also has the CubCrafter header less fuel system.
The empty CG weight falls in the center of the range specified in the type certificate. With the wings off, the aircraft balances on the lifting fitting at the front spar location. Trim range is about 28 or 30 turns stop to stop. The v on the jack screw yolk is pointing down and the horizontal cross tube touches the longeron on the bottom and the yolk touches the frame brace on the top. I have Full trim range.
Measuring the the movement of the horizontal stabilizer I have within hundredths of an inch on both up and down position on the horizontals as compared to a new Carbon Cub which is being built here. The carbon cub has approximately 28 degrees up deflection with full up elevator and I have 33 degrees full up elevator..
Problem is that while I have full trim range and all is well with two notches of flaps, full flaps require full forward trim and forward stick pressure during a three point landing. It is the slowest landing cub I have ever flown but there is no reserve for additional elevator. Seems to make little difrence even when I have weight aft.
I am am speculating that the full flaps move the center of lift aft and I simply run out is elevator power on a very slow full stall landing. I am looking for a set of pa18 horizontals and ailerons and hope that they will be able to provide the additional elevator power required. If any one knows of a set available please advise.
I have never ever flown the zero thrust mod and read the recent discussion with interest and wondered of that would have any bearing on this issue. This cub was built to existing configuration in the 90's and I don't remember when the zero thrust angle became popular and I don't know if this cub has it or not.
if anybody has had any experience with overly powerful flaps or lack of elevator effectiveness or other thoughts on this issue I would be interested in hearing your thoughts.
stu