ORIGINAL: cmoulder
Matt,
No doubt you are correct about the 12'' pitch. It just smoothed out everything, much steadier pace. I understand now why you have been somewhat obsessive about getting a 12''-pitch prop to work.
Well, you've been doing this for some decades! But it was a revelation for me, and glad to hear I wasn't dreaming about the apparent lack of zip on take-off.
What is the AUW of your Temptress? Surely a lot lighter than your Enigma test bed, so you are going to be quite happy.
Too bad I have to work tomorrow, or I might've made it down your way to witness.
Best of luck!
Bob,
Temptress has picked up a net of about 4 ozs so she's up to around 10 1/4 lbs now.
I removed the 5 cell 1650 NiMH and replaced it with Ed's regulator and a 2 cell lipo. The net loss there was about 2 ozs. I went to a smaller tank too. The soft mount reduced the weight another 1 1/2 ozs or so. Removed about 15% of the firewall (opened a hole). Tried to make the net difference in weight distribution as small as practical
Moved the battery as far back as practical but it's a much lighter pack so the net effect will be small regarding CG. I was running my CG at just about 30% MAC before, but there will be a net weight increase in the nose. This CG shift should bring it forward to around 27% MAC. I haven't really measured it.
Anyway, I'm finally taking the opportunity to fly Temptress with a much more forward CG than before which should require a couple clicks of up trim. We'll see