M20F cruise speed

[M20F-1968]

On 8/12/2018 at 3:02 AM, Marauder said:

 

I think John’s highly modded F and wcb are both turbonormalized planes. Not sure where their critical altitudes are.


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The highest I have been is 18,000 ft.  I have not gone searching for the critical altitude number.  I think Rajay says 20,000 but I may be mistaken.  I would need to dig out the old files again.  At 18,000 I am still pretty much holding manifold pressure.  I have spent time learning about other aspects of the plane.  I usually fly it in the mid-teens and use higher when there is a reason.  Usually run 100 ROP, but have been test LOP more often.  Jean Paul at GAMI like oversquare, 40-50 LOP.  My mechanic had it at 17,000 LOP and it was a 175 kt TAS airplane.

John Breda

[wcb]

On 12/24/2019 at 5:17 PM, M20F-1968 said:

The highest I have been is 18,000 ft.  I have not gone searching for the critical altitude number.  I think Rajay says 20,000 but I may be mistaken.  I would need to dig out the old files again.  At 18,000 I am still pretty much holding manifold pressure.  I have spent time learning about other aspects of the plane.  I usually fly it in the mid-teens and use higher when there is a reason.  Usually run 100 ROP, but have been test LOP more often.  Jean Paul at GAMI like oversquare, 40-50 LOP.  My mechanic had it at 17,000 LOP and it was a 175 kt TAS airplane.

John Breda

My RayJay manual says not been evaluated for flights above 25,000 feet.  Also, max continuous ops 3,500 to 20,000 feet is 27 MAP and 20,000 to 25,000 feet is 25 MAP.  All this to say I think John (not speaking for John) and I would highly recommend turbo-normalization.  In-fact I think what Mooney should do is go back to selling a mid body 4 cyl with turbo and try to sell them for about 400k.  Yea yea I know the jigs and plans destroyed etc but it could be done.