Re: F24R46/UC61K Vne Anomaly

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dave@hadfield.ca
Posts: 10
Joined: Wed Dec 19, 2018 8:41 am

Re: F24R46/UC61K Vne Anomaly

Post by dave@hadfield.ca »

'I was replying through my email feed. Now I see that these replies were not posted. Again:
The Type Certificate Data Sheet lists 185 mph as the Vne for a 24W46. Other models are listed in the TCDS library.  http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/7CEE7E3A70CBCCE885256735006402FA?OpenDocument
Max for Flaps: 94 mph
There is no mention of Vx or Vy, but I've been flying my F-24W46 now since 2008, about 450 hours, almost always on grass farm strips. I believe that 75 mph would be about the best Rate of Climb speed, Vy.  As for Best Angle, Vx, I'd fly at 65 mph.
Neither of these speeds, at full power for an extended period, may supply enough engine cooling -- especially for the back cylinder in a Ranger. Depends on several factors.

'
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robert Etter
Posts: 234
Joined: Tue Feb 27, 2001 7:37 pm

Re: F24R46/UC61K Vne Anomaly

Post by robert Etter »

' Sorry, I had a brain fart.  I realized that you were looking for numbers about 30 seconds after I hit the "SEND" button.  No wonder I didn't remember that the terms were, it was "69" what I last looked at the books.  Some where in the FAA archives it may be found.  I would doubt it.  
On ?Monday?, ?March? ?11?, ?2019? ?04?:?45?:?01? ?PM? ?PDT, JP jp.lorie@yahoo.com [fairchildclub] wrote:


 
Robert, Thanks for responding but I was looking for the numbers for each. Do you know what they would be? Thanks for your help.

J.P. Lorie` 
On Mar 11, 2019, at 11:01 AM, Robert Etter robertetter@ymail.com [fairchildclub] wrote:

 
Thanks to Wiki
Vx - Speed for best angle of climbVy - Speed for best rate of climb.
Bob On ?Thursday?, ?March? ?7?, ?2019? ?07?:?23?:?35? ?AM? ?PST, Jp Lorie jp.lorie@yahoo.com [fairchildclub] wrote:

 
On that same note, does anyone know what Vx and Vy is for an F 24 with the Warner 165?

J.P. Lorie`
On Mar 6, 2019, at 11:55, frankjcox44@gmail.com [fairchildclub] wrote:

 
Folks,

I am getting pretty close to getting my UC61K/Argus back into the air - Paperwork permitting!
However I have come across an anomaly with regard to the ASI Vne red line. Some time ago I had the ASI red line marked at 185mph as per TCDS A-706  but today I was browsing the Pilot Operating Instructions (AN01-115CC-1 dated 25 August 1944) where, at  Section III under Flight Operating Data it gives a Vne of 160mph...
Was this lower 'Military Limit' perhaps imposed to prevent those pilots who were keen to 'Explore the edges of the envelope' getting anywhere near the real limit?!?
What are people out there actually using as Vne these days?
Many thanks
Frank CoxArgus III G-BCBL







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