Lacking turbos and turbines, I just poke along at 8500 feet at 220 TAS (around 190 IAS) burning 13.5 gallons per hour and watch the terrain go by. That's about 16.3 nautical miles per gallon. Slow, but reasonably economical even though I plow along through the thick air. Takes about 5 minutes to get there from sea level, and then lean it out and trim.
Going to thin air at FL 220 and burning 23-25 GPH to deliver 230 KTAS with a turbine yields 9.6 nautical miles per gallon.
Hardly sounds like efficiency to me.
Turbines are to go high and fast and damn the expense. Always have been. Always will be.
F
-------Original Message-------
Date: 1/11/2012 9:58:12 PM
Subject: [LML] Re: Performance Data Walter Engine
Have I missed something? Have not flown my IVP at FL220 yet, but economy
cruise I've heard about could be about 28" MAP burning 16-18 GPH and around
260 kts TAS. Are those numbers realistic?
John Barrett
N31VP - waiting for BPE engine overhaul completion.
-----Original Message-----
Weinsweig
Sent: Wednesday, October 31, 2012 5:50 AM
Subject: [LML] Re: Performance Data Walter Engine
After Ronald asked about pulling back the power on a propjet, I experimented
a bit.
On a recent flight at fl220, I pulled the power back to burn 23-25 gph and
maintained in the 160's kias and 230's ktas in my TKS equipped propjet.
Almost piston efficiency. Watta Plane!!!!
David Weinsweig
N750DW Propjet
Hi Ronald,
Each propjet has somewhat different performance. Mine with tks deicing
generally flies between 275-300 ktas in the flight levels. fuel burn is
29-39 gph depending on altitude and power settings.
as a baseline I just flew from key west nonstop to huntington, wv at
fl210 due to strong headwinds and power pulled back some to conserve fuel
and range. I burned 29gph with a true of around 275 ktas in 3;42 nonstop
burning through my wing fuel (112 gallons) but still having 34 gallons in
the belly tank when i landed. I've done this same flight previously in 3:10
but the winds sucked on Sunday. I have found that the turbine engines just
burn fuel and 25 gph may be a little low to maintain any speed though I do
get that low on descents. They burn close to that at idle.
I'd be happy to discuss the good and bad of turbines and the conversion
options/shops with you if you'd like as I have had both good and bad
experiences.
David Weinsweig
N750DW Propjet
304-633-5221
Hello guys
Today I flew in a Bonanza with an Allison 250 Turbine, and it was awesome. I
was very impressed by performance and the silence and no vibration.
So I got curious now about having a Walter Conversion done, but when I was
looking for performance data (cruise/fuel flow/ economic or power @
altitudes) I could not find anything on the web?!
For example I like flying @ 17500ft, just because I can listen to the radio
and do not have to chatter and can avoid bumps when I see one lol
So what does a walter engine burn at this altitude? Could it fly with just
25gph and what would be its performance?
Things like that...
So does anyone have this ? And is there anyone I could fly with (I pay for
fuel) who can show me this in his 4p? (I live in Central Florida, but I have
a 4p ;)
Thanks -- Ronald
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