Mailing Lijst lml@lancaironline.net Bericht #33675
Van: <Sky2high@aol.com>
Afzender: <marv@lancaironline.net>
Onderwerp: Paul's Notes
Datum: Sat, 31 Dec 2005 17:02:25 -0500
Aan: <lml@lancaironline.net>
In a message dated 12/30/2005 10:15:21 P.M. Central Standard Time, elippse@sbcglobal.net writes:
I know this isn't e-bay, but I know the exact formula for the timing of Klaus' PLASMA I,II,III NA, HC, and Turbo! What am I bid?
In a chemically-correct mixture, it only requires 0.5 milli-Joule to obtain ignition. PLASMA's put out in excess of 120mJ.
PLASMA l&III have multiple, opposite polarity sparks that really excite the molecules in the intervening gases which then get very hot, hence the name PLASMA. Notice: this spark is a very light violet color, almost transparent rather than blue, and a piece of paper put in the gap will ignite!
In all this discussion of timing and thetaPP, no one has mentioned flame-front propagation speed vs charge density.
Litton Industries and Hughes had D-Sub connectors on their approved list for spacecraft. 'Course, gold only, not tinned!
    Now for a request. I fly a 235 with an O-235, 9.7:1 CR, putting out about 123 SL hp at 2800 rpm, with dual PLASMA I ignitions and an ELIPPSE three-blade prop with 76" effective pitch. I have extended wing tips which add about 2 sq. ft. and 20" span. I get 1550 ft/min ROC at SL, 2420 rpm, 110mph IAS, 1350 lb. At 1000' dalt, 2950 rpm I get 214 mph TAS; at 10,000' dalt, 2800 rpm, I get 201 mph TAS, and at 14,500' dalt, 2750 rpm, I get 198 mph TAS at 5.8 gph. These numbers were all obtained with a highly-calibrated pitot-static system, true OAT, and a GPS. I would like to get comparative data from those of you who fly 235's. Thanks!    Paul
Paul,
 
1. $.02
 
2. OK!
 
3. I like violet.  Too bad I can't use paper, its cheaper than gas.
 
4. Sure they have, just with different words. Among other ways, timing at RPM and altitude.
 
5. Spacecraft just don't shake like a four-cylinder engine.
 
6. If I had a 235, I'd share the info with ya for something in exchange.  See #1.
 
Grayhawk
 
PS Glad to se you joined the ever changing http://www.frappr.com/lancair
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