John,
Chris is using Tracy's apex seals (2mm) which are fairly tough and is only using
about 3 psi boost so any ideas on what is causing detonation ?............Perhaps too
much ignition timing or mixture problems such as spending to much time at best
power mixture (1700+ f EGT) instead of richer than best power before leaning
quickly to lean of peak EGT..........What EGT temps do you routinely see during
takeoff, climb and cruise ?..........Do you aggressively lean at cruise ?............
Thanks,
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo
From: John Slade <jslade@canardaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Fri, March 4, 2011 4:30:29 PM
Subject: [FlyRotary] Re: Knock sensor and indicator
On 3/4/2011 4:43 PM, Kelly Troyer wrote:
> engine runs reported by Chris at high manifold pressure, high coolant temps and as you mentioned
> probably high intake temps with little or no airflow across the intercooler.............
I did many, many engine runs and high speed taxi tests prior to flight, often with the temps at the limits. On occasion I was able to hear "pre-ignition" and back off the throttle. There was no sign of damage to my seals - but mine are 3mm 'indestructible' seals from Tracy.
John
Slade
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