I've installed a new engine on my Midwest SuperHots, and SK 80 from Kangke. This engine swings large props.
The SK 80 replaces a Tower 75--and engine intentionally designed to have a torturous midrange.
In an effort to accommodate a 15x6 with at least 2" prop clearance, I've fabricated and installed new mains, which are 6" tall by 13-1/2" wide. The original mains were 3-5/8" tall by 11-3/4" Wide. I took a guess at the width of the new mains, the height obviously being dictated by my prop clearance requirement. I tried to duplicate the slight toe-in and negative camber of the stock gear.
Dave Brown 3" foam wheels. Old and new gear made with 1/8" Aluminum, very much conventional construction.
Prior to effecting this mod, I realized a host of ground handling problems may be introduced, and that has indeed turned out to be the case. Previously rather well behaved, the plane is now almost impossible to handle on the ground. Slow taxi, take-off roll, you name it...it has a mind of its own. Actually taking off was out the question--absurd.
I'm an ok pilot, mostly experienced with tail draggers. It was almost comical to observe the lack of response to rudder input. Crosswinds gusting to 15+ knots helped enormously.
The question, of course, is what is the stinking problem? Well, such a thing may be impossible to diagnose without first-hand examination and observation of the hilarity. So instead of asking for specific answers, let me simply make a inquiry into your general understanding, philosophy, etc. of the nature of tail dragger gear configurations, their inherent idiosyncrasies and problems, and your general approach, angst, and successes.
Toe-in, camber, position of wheel relative to the plane's CG, P-factor factors, rudder authority--anything and everything in any discipline you choose: experience, physics, incantations, a 6th sense--anything. I request rumination.
I have done multi-searches, the bleery-eyed type in the usual venues, RCU, etc. I value this groups input. Thanks so much once again. Regards, Dave AMA 395450