----- Original Message -----
Sent: Sunday, October 03, 2004 9:37
PM
Subject: [FlyRotary] Re: First post Ivan
flight
I almost always accelerate to 120 mph for my
climb as that has previously given the best rate of climb for my somewhat
heavy RV-6A. This new prop and gear box have increased roc by approx
500 fpm based on the one flight to approx 1500 fpm.
However, with the larger prop I think
I need to do some more testing as a slower speed but faster roc just might be
in the cards.
I'd bet they are. My RV-3 has always defied
the "standard RV" 120 mph best ROC rule. Best ROC has always
been in the 90 to 100 mph range, though it's also done well at higher
speeds. I believe Tracy mentioned that he's seen a trend
toward best ROC being at lower speeds since he went to the 2.85
drive. My only SWAG is that we have more torque, so we're able to
produce more power without having to unload the prop as much as you would
at higher speeds.
Well, its clear that a total of 28 sq
inches core inlet is more than adequate for a 13B at cruise around
5200-5400 rpm and 8 gph. My oil and coolant stayed at 165-170 with OAT at
70F. However, when I bumped the rpm up to 6300-6400 the oil rose to 200F
and the coolant to 205F before stabilizing given me a true airspeed of right
at 200 MPH burning 11.8 gph. So It appears I need to open my left
core inlet back up a bit from its current 10 sq inches to approx 18 sq
inches.
I
don't follow your logic here. You're saying that full throttle
cruise is 200 F oil and 205 F coolant? What the heck
is wrong with that ?
Hope to see you there. Any chance of
you attending Charlie England's flyin in Mississippi weekend of the 16
Oct?
Nope, no chance for the 16th. Basically, I've
got 3 weekend to fly off my remaining 7.3 hours, and do some additional
testing. If anything else goes wrong, even Tracy's fly-in is
off for me. To be honest, I'm still kinda bummed that it's being
move to a different location. I would have voted for postponing, rather
than moving.
Cheers,
Rusty (selling Airbike in 22
minutes)