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Hi Valin,
I'm not sure why you're concerned about the extra drag from the main
landing gear doors. When I practice simulated engine out landings, I don't
lower the gear until it's clear that I'm going to land too long if I don't do
something to slow down. If I had a real engine failure and wasn't going to
make it to a runway, I'd probably leave the gear up.
Regarding the need to cycle the dump valve to get the landing gear up or
down, in 700 hours in my Legacy, I've never had a problem that required opening
the dump valve. My guess is that it's a rare condition, possibly limited
to a small number of Legacies, most likely due to a problem with the
hydraulic power pack. Based on my experience, I wouldn't add more time,
money, and parts count to solve a problem that's unlikely and, if it
does occur, has a simple immediate fix.
Best,
Dennis
----- Original Message -----
Sent: Tuesday, April 22, 2014 12:03
PM
Subject: [LML] Re: Hartzell Prop Governor
Low RPM Capability
Thanks
John. Makes it clear why one of the Legacy instructors was quoted as
saying, “With the engine out, the Legacy comes down like a greased Buick” – I
guess specifically talking about with the gear down.
We
have Adam Molny’s closing inboard landing gear door system which should help
with the gear down drag a lot. Adam, if you see this, do you have engine
off sink rate numbers with your gear down and inboard doors closed you can
share for comparison?
Thanks,
Valin
Thorn
Legacy
Project
Boulder,
Colorado
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