FlyingToIST
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- Joined
- Nov 19, 2002
- Posts
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FlyingToIST said:A 1978 year old PA38....
FlyingToIST said:A 1978 year old PA38.
Thanks for bringing this up.Timebuilder said:For those not familiar with this airplane:
http://www.airliners.net/info/stats.main?id=309
...This is for those who may not know why it is sometimes called the traumahawk.
Other information that I have found from other sources include:The FAA certified Tomahawk "had been built with a rigid wing structure...necessary when using (its) airfoil."
The Tomahawk was completely redesigned after certification, and the resulting "softened wing structure could (make) the wing a new and unknown commodity."
The production Tomahawk, as redesigned after certification
- "had its wing rib numbers reduced (from 11) to four"
- had wings that were "...able to be torsionally twisted without substantial effort."
- was "totally unpredictable...the wings flexed noticeably"
- had a design that "...opens a Pandora's box regarding its performance"
and"A third former Piper test pilot...told investigators that production Tomahawks 'were nothing like the article certified (by the FAA) as far as stall characteristics are concerned.'"
NTSB report is available at http://www.ntsb.gov/NTSB/brief2.asp?ev_id=20001206X00857&ntsbno=CHI94FA097&akey=1.A 1979 Swedish National Aeronautics Board investigation of the Tomahawk's stall/spin characteristics...after performing more than 60 stalls with two production Tomahawks...concluded that the airplane did not meet FAA certification requirements for wings-level stall characteristics, or the FAA requirement for a stall warning.