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<< Lancair Builders' Mail List >>
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Date Mon, 26 Mar 2001 083233 -0500
From edechazal@molex.com
Subject Oxygen use in the LNC2
I'm considering getting a portable oxygen system for my 360.
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I thought that I would restate some aircraft specs from the past.
What prop model and engine you have on your plane?
Hartzell CS from Lancair. Lycoming O-320-D1F again, from Lancair.
I'm curious if you can remember what fuel flow the engine what doing at that altitude.
I don't remember but it was not as low as you would expect for a density altitude of 22,500 ft. My first leg was from Carson City NV(KCXP)to Pueblo CO(KPUB), 700 km away. I could have made another 100 km but I had already run both wing tanks dry.
At 12,500 ft, my plane trues out at 188 kts wide open at 2,450 rpm. Ram increase is a little over 1". It seems to go slower at 7,500 ft, probably because 75% is hard to determine and I fly conservatively. I have a MH oxygen system. I generally use the oxygen at night.
After listening to all of the comments, I will have to try flying at 17,500 ft through 19,500 ft (IFR of course). Within the next month, I will comment on the true and indicated speeds at these altitudes.
At 22,500 ft density altitude, my plane trued out at 174 kts while indicating 122 kts. I was not yet at the service ceiling. The controls worked just like they should have at 122 kts indicated.
In the Dogwood race, I averaged 184 kts at 2,600 rpm at 3,000 ft. 360's truly are faster.
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Lorn H. 'Feathers' Olsen, US MidTel, Corp.
248-771-1010, LNC2-320, N31161, PTK, Michigan
lorn@mich.com
LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
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