Anybody out there knowledgeable about effects of altitude on static
thrust ?
I'm at KLAM elevation 7272, and it's summer so, density altitude can be
10,500 easy.
Played with timing and fuel pressure/mixture got my static thrust up to
185 lbs. Normal for my engine/prop at this altitude? (Soob EA81 draw
through Ellison turbo rated at like 125 hp (sea level?)).
(it was 155 without cowling and canopy and it took like 30 minutes to
comb the snarls out of my hair)
I still just don't think that my engine is making full power.
I talked to Warp Drive but they don't have any numbers on a 60", they
told me that some guys running that engine use a 68 or 70" and have it
set to 11-12 deg at tip and are seeing 400 plus static thrust (sea
level?) My prop is set to 14 deg at tip
I'm going to run a dynamic compression test to see if my rings and
valves are good. But need an
adapter for my auto spark plugs.
If that turns out ok, I'll lower the pitch of my 60" 3 blade warp drive
to get more rpm (right now I'm getting 4550)
I found an RC airplane forum where somebody claimed that it goes down by
30% at 5000 ft (from sea
level).
I also found that one that says needs a minimum thrust of 25% of
aircraft weight to get it out of ground effect.
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