Been quiet here lately. So, is the GT40 turbo still favored for the 20B? What is used for the 13Brew tt engine? What trims?
M
From: Rotary motors in aircraft
Sent: Saturday, December 18, 2021 9:18 PM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Fwd: Rv-4
Here's a post from the old Lamar list where he says that he's pulling the rotary from the -4.
charlie
-------- Forwarded Message --------
I flew down to Troutdale Ore from Paine Filed yesterday, the engine ran without a hiccup- like always. When I shut down a gentleman ran up because he recognized the sound of a rotary. He stated that he had attempted to install two rotarys in aircraft but had never finished his project. He said he is the one who sold his 20 B to Tracy Crook and that is the engine in his RV-8. Anyone know his name? I didn't catch it at the time.
I'm still going through with the 0-320 and constant speed prop conversion on my RV-4, at least at this time. I'll take off my FWF installation, maybe P-port it and install it on some other aircraft in the future. It's not that my engine has ever given me trouble, I just don't want to feel like I'm a test pilot every time I fly. I' always waiting for the sword of Damocles to swing down on me, and it sort of takes the fun out of flying. But the Rotary that I have in my plane might make it into a stol aircraft in the future.
Brian Trubee
No doubt about it. A-O320 is more reliable. In part because most people do a leak down
check every year. If it fails the leak down check it is usually a leaking exhaust valve. You must
replace it as it could fail catastrophically and destroy the rest of the engine. There is also
a lot less to go wrong.
I averaged 500 hours per exhaust valve on my O-470 and then it cost $1000 because it was a certified
air plane and engine.
Paul Lamar
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