You are probably OK for first flight - I test flew a Moose with an
LS-6 a couple of weeks ago, and could only get 4,080 rpm on takeoff. (2:1)
It climbed 1,200 - 1,600 fpm ! They are working on re-setting the
prop governor so I can get at least 4,800 ... as well as cooling,
and other issues. Scheduled to try again this weekend, so will keep
you posted. You will likely gain a couple of hundred or more rpm
in flight.
FWIW, for first flight, I prefer just over half tanks, and at
least 100+ lb (water softener salt ??) well secured in the baggage
area - keeps it relatively light, and with a reasonable C of G.
2 notches of flap for takeoff OR landing works fine - do not use
more ! You might want to taxi a bunch of donuts on pavement,
dragging the brakes, to seat them in - they'll work a lot better
if you need them. ;-) I usually need an extra cushion - so eyes
are just below the wing - this gives much better forward vision.
Good luck - and have fun !
--
......bobp
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.qbeautyzone.com
-------------------------------orig.-------------------------
On Wednesday 20 September 2006 07:13 pm, Mike Kimball wrote:
I did some max power engine runs the other day and was disappointed to only
get 4300 RPM static. That's only 2038 RPM at the prop. I know I should get
some more RPM once I'm moving forward. Any ideas how much more I can hope
for? Assuming it's only a couple hundred more RPM that puts the engine at
4500 and the prop at 2133 which is 0.70 MACH at the prop tip. Max prop
thrust needs at between 0.88 and 0.92 MACH according to my web surfing. My
question is if that is enough to safely accomplish first flight? Judging by
the accelleration during my recent high speed taxi tests I think it will be
fine and I can try to address the low max RPM over time. A little over 2100
prop RPM just seems really slow for takeoff. By the way, 4500 RPM gives me
about 380 HP and well over 400 ft-lbs of torque.
Mike
044SR
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