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Vne Speeds

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Vne Speeds

Postby 17031 » Sun Jul 25, 2010 3:49 am

This is probably a dumb question but here goes. The Vne speed for my 67 260B is currently a little over 200mph. I understand there is a mod that could be performed to bring Vne back up to the original spec of 227mph (if I remember correctly), what is that mod? Is this Vne speed IAS or TAS? If IAS, then does that mean that at higher altitutes one could fly well over 200mph TAS?
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Postby jeffrey aryan » Sun Jul 25, 2010 5:23 am

Tim,

VNE speed is "indicated" airspeed.

Try calling LoPresti Speed Merchants. I think they have a STC or Mod for raising the VNE. I believe it involves putting on Weighted Tips on your horizantal stabilizer. I think they look cool. FWIW.

Jeff

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Postby MULEFLY » Sun Jul 25, 2010 12:46 pm

LoPresti has the mod... it is a pair of counter weights that are mounted on the stabilator. I owned a 260B that had the Piper mod... Vne was 227.... If I recall correctly you also need counter weights on the vertical fin.

I did find that in decents from altititude that in smooth air, I could bet above the 203 mph Vne... the mod never showed any sign of flutter... from time to time, I have seen the mod parts on ebay... you might keep an eye out there too.

All the best!
Jim

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