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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-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dr.
Weinsweig
Sent: Wednesday, October 31, 2012 5:50 AM
To: lml@lancaironline.net
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
weinsweigd@tsnci.com 10/23/2012 4:59:28 PM >>>
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
weinsweigd@gmail.com ronald@sdc.com 10/22/2012 10:13:17 AM >>>
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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