ORIGINAL: H. Wayne S
I'm sorry, but there is something seriously wrong here. You should be able to richen up any and I do mean any engine on the high end at WOT to a point it will at least drop 25% of its peak rpms. I cannot believe a company like DA would say they cannot get one to go rich and still sell the thing.
I don't buy this and now I won't buy that.
Just my .02.
I've got to tell you, that's the way I see it also. Mine is turning a Bolly 22 x 10 wood prop at 6600 peak on the ground. The richest I can get it is 6550 with the high needle. Sure, I can go in and open the low and drop it another 50 or 100, but then that screws up the idle. As it is you have to have the low 1/4 on the rich side to take care of the lean spot at 4,000. Now throw into the mix, as the temperature changes on the engine in the air, the low and midrange mixture change..... The needles don't move, but the way the engine runs does. I don't expect it to stay perfect 100% of the time, no matter what throttle setting or attitude you're in, but when it makes as drastic a difference as it does, this is unacceptable in my book....my style of flying...IMAC/3D.
I'll be watching real close as my buddies DA50 breaks in. His DID richen up 25% at WOT with the high needle. Brian said he would sure like to have that one back in shop to take a look at.