I’m able to maintain 5,000 cabin altitude (my home base is 5,100) at 17,500 with 23” MAP. And I know my cabin leaks.

Jay Phillips

From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dico Reijers
Sent: Wednesday, April 03, 2013 2:43 PM
To: lml@lancaironline.net
Subject: [LML] Minimum MP for pressurization

Hello all,

I was looking through the TSIO-550 Power Settings Chart and noticed that it said the min MP for pressurization was 31.5"....  I'm just wondering if this is true for all IVPs?

I was up to FL170 the other day at 28.5" and the cabin was showing perhaps 7800.  Should I assume that if I was running at 31.5" that the cabin might only have been showing perhaps 5000'?  The reason  I ask is because I'm thinking if we're at FL170 and the cabin is pushing 8000, then at FL250 (or even FL210) the cabin pressure would be well over 10,000'.  I had thought it might have been because I have a leaky cabin or something.... but perhaps its because I'm being too cheap with the fuel....

Thoughts?

-dr



--
Regards,

Dico Reijers

InternetWorks Ltd.
300 University Avenue
Charlottetown
PE, C1A 4M4

902-892-4671 (T)
888-368-9484 (F)

www.internetworks.ca
www.apartmentspei.com