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Y'know, not meaning to offend anyone, but I am trying to mate a 400 hp 20B to a 250 knot+ Lancair, and after hearing how successful some of these installations have been, I am getting a little nervous. Are these firing/grounding/running problems common? What am I missing here? How about some straight answers from some people in the know? My life depends on this stuff. Although my budget isn't unlimited, I am willing to spend what is necessary to guarantee that at least I can get on the ground if something goes wrong, but what do I buy???? I could sure use some input from Tracy, and guys like Tom Parkes, etc. (who won't return a query), about what they are experiencing with this genesis of rotary installations. I just want to get to 18,000 feet, cut back to 70%, and relax. Again, if I offend, I apologize.
Greg Ward
650-766-1480
----- Original Message ----- From: "cbeazley" <cbeazley@innovista.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, February 18, 2008 12:54 AM
Subject: [FlyRotary] Re: staging
Hi Don;
I don't have one of Tracy's EC-2's or a Renesis CAS so take this with a grain of salt.
A noisy CAS signal / bad ground is the bane of 2nd gen CAS with RX7's.
A search for a 3800rpm hesitation on the RX7 will yield a lot of hits. It is grounding related.
Are the CAS wires shielded?
Is the shielded wire grounded to the EC-2 end only?
Is the EC-2 grounded to the engine or battery?
I am not sure what Tracy is using for signal conditioners- a small capacitor across the
CAS G+/- wires has helped on the Megasquirt.
Have you scoped the signal?
You won't want to hear this either, but, most fuel pumps are only good for a small number of air sucking/overheat events.
Also applies if you uncover the inlet doing hard sideslips on empty tanks or whatever. Your current pumps are one step closer to dying.
Cheers
Cary
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