IFMT

Just letting everyone know that Mr. Dave Johnson, owner of "Reductions" in Canada, passed away 22 Sept 2011.

I purchased a used EA81 with his reduction belt drive in 2003. I wrote to him trying to find out my ratio, where to get a new belt, and specs on washers and bolt torks on his engine mount. His wife just sent me a letter that he had passed away and the company is no longer in business.

If anyone can give me any of this info, I would appreciate a posting or call me afternoons CST.

Thanks, Ed in Missouri 314-753-8587

If you have a warp drive prop contact warp drive with the serial number off the prop blade. They may have the ratio info. I replaced my blades and they had all the info on file from 2001. Check with an industrial belt supply like B.C. bearing in Canada for the cog belt.

Checked it all out again today. Had the adjuster rods with the tie rod ends in upside down. Didn't have an illustration when I first put them in. Leveled the wing and reset the ailerons to -6 degrees. Also am shortening limiter cable at back of the skis. They were a little long and probably were a big part of the problem. Went through every bolt and did discover a couple of jam nuts loose. One was even in backwards. Flat side is the jam side. The tie rod end by the universal at the bellcrank on the floorboard was twisting in the threads rather than the universal doing its job. It's all snugged up now. Just have to test fly it now! Thanks again.

Thanks for the response gentlemen. I will recheck all the rigging for sure! The way I understand the manual it says to level the wings and then set the flaperons to -3degrees. Pretty sure I did it that way but you never know. -3 would mean the flaperon is slightly up when stick is centered? The movement is definitely not even traveling up and down. Thats it for now till I can check it all out. Cheers. B

Thanks for the response. I got thinking it over again and wonder if to much fuel in the left wing (plane had been parked for a couple hours on a slight slope) combined with torque effect of the prop and my weight on the left side all add up to no response. How critical is the side to side balance. Both tanks run down to the header tank but there are no valves to isolate the tanks. Fuel can run from one tank to the other. The plane is a standard mark IV STOL with subaru and 70 inch warp drive. It's on airdale wide gear with skis right now. Cheers. B

Hello everyone. I just put the upgrade F7a differential aileron parts in my mixer of my Avid mark IV and set the rigging as per the builders manual. Everything seemed alright until I got up to join the circuit and found out I had very little response with right aileron. All I could do to keep it level and don't dare drop the left wing. Had to make some very peculiar turns stabbing the rudder to the right and managed to get her back on terra firma. I must say I impressed myself by staying out of the bushes. Has anyone had any problems associated with the differential aileron upgrade. Thanks.