Piston vs Turbine

[Reed, Britt/FSC Salt Lake]

Mike - Pertaining to our conversation about the Walter turbine powered
SR3500 -
On the AeroComp 7 the the glass laid up wings are relatively heavy by the
time the builder finishes and the need the Hp to get off the ground -

The engine that I was trying to remember is the Orenda - a big block V-8 w/
twin turbos -

You mentioned that the SR has 140 gallon tanks - It will need them!

The website for the AeroCommander retrofits
http://www.mrrpm.com

Outlines the relevant data that in this case reduces to -
Turbine Piston
140 gallons of Jet A 94 gallons of Mo Gas (about)
@6.7 lb/gal =938 lbs @ 6 lb/gal = 564 lbs
difference - 374 lbs
Installed weight
250 lbs 550 lbs

1800 Lbs 1800 lbs
-938 fuel weight -564 fuel weight
+300 lighter engine 0 std engine
=1162 lbs useful 1236 lbs useful

@.62 lbs/HpHr, 200 hp @.42 lbs/HpHr, 200 hp
= 18.5 gal/hr = 7.5 hrs =14 gal/hr = 6.7 hrs

Also interesting is the maintenance implications -

Also interesting to look at our "Big Brother" using the Orenda -
http://www.orenda-recip.com/applic1.htm

Later - Britt - 194SR





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