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Message
Rusty,
Before you go adding weight to
the tail - my RV's forward CG (empty) was 1/8" forward of Van's Limit (in
addition to weighing 1170 lbs). I called Vans to check on the C.G. limit
and as long as it was the "forward" limit there was no concern. They
fretted more over my weight than the C.G.
Depending on how much forward of
the limit your C.G. point is, you may want to make the first flight before
adding more weight. Before I painted my aircraft, the only time I noticed
any effect from the foward C.G. was when using full flaps with tanks almost
dry. I would sometimes run out of nose up trim at slow airspeeds.
Once I painted the aircraft, the weight of the paint on the tail apparently
more than compensated and I found I had full trim authority back at slow
airspeeds.
The only other possible down side is
your horz stab will need to produce more down force to keep the nose up and
therefore produce a bit more drag. My fastest straight and level airspeeds
have been on way to Sun & Fun when I have the plane loaded to the gills
which moves the C.G. further back, off-loading the horizonal stabilizer.
On aircraft that do not have the elevator control authority of an RV, you could
encounter lack of sufficient elevator control to bring the nose up for
sufficiently for a flair on landing. However, I've never had any
problem with that and doubt any RV would.
FWIW
Ed Anderson
----- Original Message -----
Sent: Monday, August 04, 2003 8:48
PM
Subject: [FlyRotary] Re: tiny tach works,
and my plane is a pig
Ed's
right I was
amazed at how easy it is to foul plugs when the mixture is too rich! If
the plugs look really carbon black, then change them
out.
They were pretty black
alright, so we'll see. These were the plugs that were used in the
original run, so they've consumed a goodly amount of assembly
goo.
I managed to lose 22
pounds of weight today. I forgot to subtract the weight of the
arms that sit on the scales. Unfortunately, I'm still a wee
bit forward of the forward CG limit, so there's probably some ballast
required for the tail. What was that... I think I just heard Tracy
screaming :-)
Rusty (worlds heaviest
RV-3)
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