Basically, when needled for good top end, good transition, and good mid-range, the engine will not drop into idle right away after a flight at mid-to full throttle. This translates into high landing speeds. Sometimes it will drop into idle after a few seconds. Other times, it won't, period. The airplane is very manageable at ALL speeds, but our 650 foot runway just isn't long enough to get the airplane slowed. Throttle cut at the flare solves this, but then one must trudge out there and drag the model back. Unsat. The last couple of flights, it began bogging down when full throttle was applied. Not always; which tells me it is a mixture/fuel draw problem. IOW, that bloody pump.

I tried the return-line mod with two tees yesterday. I really couldn't get a grip on how this worked, since I had so much trouble starting the thing and didn't fly this mod. While I had the cowl off, seeing what THAT was all about, I noticed that my throttle linkage had slipped and was introducing a bit of slop into the pushrod. Never was happy with that arrangement anyway; what I get for being in a hurry. So I said enough of this and put it up. We then put nine flights on my pal's WH 28% Extra/Brison 3.2. I need to go gas...

Anyway, I yanked all of the plumbing and throttle linkage out last night, and am re-doing a proper throttle linkage that will be tight and slop-free. Then I'll start over on the tuning process. I will also quit using my usual fuel mix, 15% Cool Power with two extra ounces of castor per gallon, and go back to straight CP 15% until the weather warms up again.

This thing is going to work, one way or another. The airplane (H9 27% Extra) flies too good to abandon. And I have no desire to run a big Saito, or Moki, etc. Yes, I know they are good. But if I have to buy another engine, it will be a 50cc gasser.