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Message
I find your data very interesting.
While I still need to do more testing, my best ROC with the new combination
still appears to be 120 MPH IAS. I consistently get 1600-1800 FPM now and
have even pegged the VSI at 2000 fpm on one occasion. I attempted one time
to use a slower airspeed but it seemed to load the engine and my ROC
decreased. But, these are preliminary data.
Thanks for the comments Ed. I'll legitimately
make 3000 fpm eventually, but it'll just be for bragging
rights. Let's see... winter, low fuel, NOS
:-)
As for climb speeds, a typical RV climbs best around
120 mph, but my RV-3 has always wanted to climb slower than that. I
believe the best climb rate was even lower in the early turbo days. The
only explanation I can come up with is that the airframe drag is still
significant enough to negate the normal advantage of climbing at a faster
speed. I think the wheel pants helped raise the
speed some, and over the next couple months, I'm going to try to clean up the
airframe a bit more. I need to install the cowl cheek extensions,
intersection fairings, and do something with the lower cowl to try to cover the
front of the muffler. I really do need to finish the major
items so I can get valid numbers and send the prop back for final
finishing. I'm only turning 6600 rpm at full throttle at 8000 feet,
and I'd like that to be closer to 7200. The airframe cleanup might get me
the extra speed I'm looking for, in TAS, and RPM.
As you know, it's a never ending project. That's
the good news, since I need something to keep me interested.
Cheers,
Rusty
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