>> presume you have set the static timing to his
recommended 35Deg BTDC.
I’m pretty sure
mine is at 5-10Deg BTDC. When I checked using Lynn’s patented tooth
counting process I found the Crank Angle pickups to be perfectly aligned and
the yellow dot was about .5” ahead of the pointer.
Here’s what I’m
guessing I need to do:
- Set engine at TDC (I did mark the TDC tooth on the
flywheel so that should be easy).
- Mark the main pulley wheel for TDC
- Measure the circumference of the main pulley –
divide by 72 to get 5Deg increments (e.g. 6.5” = .090”) and/or
measure the flywheel (bigger circumference and therefore better resolution)
- Make a mark at the 35Deg position (or .135 of the
circumference from TDC)
- Adjust the Crank Angle Sensor accordingly.
Does this sound right?
>>What does your fuel mixture meter show? I
guess you could be running so rich that you have a nice fire going in the
headers...
The MicroTech says the
A/F is between 13-14. Starts out closer to 13 and works its way up to closer to
14 as it warms.
I’m going to check
the timing again and retard it some more.
Thanx,
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Finn Lassen
Sent: Thursday, November 03, 2005
5:47 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Another
Run - with Questions
Joe Hull wrote:
I ran the engine for an hour straight tonight. It seemed to
run well but I do have a couple of questions that maybe this esteemed group can
comment on.
- Engine starts out at about 1300RPM at idle when cold and Oil PSI
briefly is 81PSI and then drops to 65 or so after 15-20 seconds. Then as
things warm up the RPM’s increase and oil pressure drops. RPM
levels out at about 1550 and oil pressure hovers around 30PSI. Is
30PSI an OK oil pressure level at that RPM? I did increase the RPM
briefly toward the end of the hour and oil pressure did go up. At
1900-2000 RPM oil pressure was around 50PSI.
I think the factory manual says at least 1 PSI per 100
RPM so it looks like you're fine.
-
-
- EGT’s are 2000-2050F. Seems a tad high to me!! My
EGT probes are located about 2.5” from the rotor housing. When
I shut it down my exhaust manifold/muffler was a very nice glowing
red. It’s made out of Inconel and is .06 thick so it seems to
hold up pretty well. But if it’s like this at 1600RPM
what’s it going to be at 5800RPM??
What does your fuel mixture meter show? I guess you
could be running so rich that you have a nice fire going in the headers...
Finn