Underperforming Continental 0-200

[dubbleyew eight]

blind squirrel how many flight hours have the maggies been on the aircraft?

focus boy focus.

[jxk]

Blind Squirrel -----
From memory the UK CAA had an 'automatic' write down of 80 fpm from the POH with regard to the climb performance for C150s.

[Blind Squirrel]

W8:-

The investigators have run off with the logbooks, so until I get them back I really couldn't tell you...

jxk:-

If in the real world I got performance values out of these tired little birds anywhere close to the book figures, I'd be a cheerful squirrel. When it comes to anything other than calculating the landing roll, I plan very conservatively indeed.

[ericferret]

Just dug out the flight manual for a 150H
To my surprise thereare actually 3 different performance right downs.
Supplement 3, take off increace by 3% ROC decrease by 30ft min
Supplement 4, t/o increace by 20% ROC decrease by 200ft min
Supplement 5 t/o increace by 20% ROC decreace by 160ft min

SUPPLEMENT 4 is the latest dated 1994

[dubbleyew eight]

ericferret those numbers by them selves are useless.
does the aircraft have a 48" pitch prop (steep climb slow cruise) a 50" pitch prop (good all rounder) or a 52" pitch prop (slow climb out great cruise).
makes all the difference.

[ericferret]

Tell the UK CAA !!!!!!!!

[dubbleyew eight]

must be all that global warming. we notice a drop off in performance in summer in australia

[ericferret]

I just checked the IPC for the F150H and it lists only one propeller type dependent on aircraft serial number. I think that the CAA would base their figures on the propeller listed for the specific aircraft by the manufacturer. Aftermarket props, anybodies guess.
However if they have been fitted then there should be a modification and that should give the adjusted performance data.

[dubbleyew eight]

I only have a cessna 150M pilots handbook available.
under the power plant limitations section it mentions the prop as a 1A102/OCM6948. the last four digits of the serial are the diameter, 69 inches, and the pitch, 48 inches. if that helps....

[heated ice detector]

you can view the type cert on the FAA web site C150 (3A19) it tells you what prop and what static rpm, maybe a good starting point.

[NutLoose]

You do not say which model of 150 but go here, find it and open one (Or Yours)

CAA issued Flight Manual Change Sheets and Supplements Search Results Summary | Airworthiness | Operations and Safety

These are the CAA additionals for the 150 range, you should find the write down figures in those, example below, they should be in your Flight Manual BTW

The write down relates to in the good old days a manufacturer would put out figures that never related to the real world, shiny new aircraft, new prop new engine, ideal conditions, test pilot etc, after all that's what sold your aircraft, you do not see a cigarette company selling their product on the basis that they will kill you, same with aircraft, you would never sell it on the basis that it was slower than it needed to be.

Example

http://www.caa.co.uk/docs/DecOfFligh...UP_1_ISS_2.pdf

Cessna Type Data certificate for the 150 is here


http://rgl.faa.gov/Regulatory_and_Gu...20Rev%2048.pdf

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