Wayne,
Your Alon's airspeed numbers sound about right to me.....
Dan
N3968H
@ CNO
----- Original Message -----
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED] ; [email protected]
Sent: Sunday, January 13, 2008 8:04 PM
Subject: Re: [ercoupe-tech] Re: Airspeeds - Was: Engine overhaul
In a message dated 1/13/2008 10:05:16 PM Eastern Standard Time, [EMAIL
PROTECTED] writes:
Wayne;
Check your rigging again one day and have a look at the weight. You should
be able to do a bit better than that, especially with yours being almost new!
In all seriousness, was the a/s gauge overhauled?
Al,
My point was only that I don't believe that the advertised Alon could
possibly cruise at 120 knots. 120 knots is 138 mph. The factory didn't even
claim that it was that fast, and the factory was pretty optimistic with their
numbers.
My airplane is very slightly out of rig, ever since my A&P and I replaced the
rudder pushrod tubes a while back. It doesn't fly perfectly straight like it
did right after I finished restoring it, and it has lost a couple of knots
because of that. One of these days we'll dive back into that whole issue
again.
As far as looking at the weight goes, I already know exactly what it weighs.
It weighs too darn much! (999 lbs empty) But I don't fly it over gross, so
the weight shouldn't make it any lower than it is supposed to be.
My airspeed indicator hasn't been overhauled, but when I did a careful
airspeed check (GPS, 4 directions, etc, etc) the average ground speed
calculated out very close to the TAS calculated from the IAS. I don't remember
the exact numbers but I want to say that at 4500 ft pressure altitude, at about
1350 lbs and 2400 rpm I was getting something like 101 knots. (Prop is a 7153)
That's far from 120 knots that the Alon on Ebay was claiming.
Best Regards,
Wayne DelRossi
Alon N5618F
Hours logged since restoration: 352.2
"Nobody has ever scientifically proven that life is supposed to be serious."
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