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smokey_bear_40220(at)yaho
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 Posted: Wed May 10, 2006 9:24 pm Post subject: Thrust - Over Rated |
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I am still trying to find the best pitch for my CAP
prop for landing. Too little and go-around is just a
noisy landing. Too much and the rpm decreases with
speed until the engine is near dead on rollout. A
touch of throttle to keep RPM up and I float forever.
The difference in pitch is still hard to find for me.
I need to find a measure to make it simple. This is
where the fixed pitch prop is easier, unless I had a
constant speed prop. 
I don't have the pitch meter, but wish I had something
for consistancy. Any experienced CAP drivers have a
solution?
Kurt S. S-5/NSI turbo + CAP
--- John Anderson <janderson412(at)hotmail.com> wrote:
| Quote: | And re slippage mentioned below, I have the skinny
blades on my w/drive and
when the throttle is closed the RPM dropps off quite
quickly and not a lot
of braking effect. But thrust wise it seems very
good. John A.
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smokey_bear_40220(at)yaho
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| Posted: Wed May 10, 2006 10:06 pm Post subject: Thrust - Over Rated |
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Sounds like it is right in there John.
My goal is 100 knots cruise at less than 6 gph. Not
as slippery as the IV's and earlier, but comfortable
to sit in.
Right now I am more comfortable at 85 knots (97 mph
for those who use it) and 5 gph.
I need more drag reduction devices, but I decided to
test each as I add them to see what really does what.
So my plane started out a drag bucket and is improving
with each add on, so far. My top speed used to be 95
knots and you could feel it fight!
Another problem is that my engine goes lean, even at
full rich, around the 4000 rpm area. No problem
higher or lower, but I don't like the EGT's from 3600
to 4300. I cruise at 3200 rpm and it is quiet. 
Kurt S.
--- John Anderson <janderson412(at)hotmail.com> wrote:
| Quote: | Early days on fuel flow but seems to be around 15
litres per hour and I
don't have a flow meter. 4500 on t/o, more there if
I want with prop setting
but that's what I use, climb 1200fpm. 97kts at 4300.
Just me in it tho at this early stage.
John
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