In article , Stormin' Norman says...

The roar and concussion were startling. Clocked at 554.69 mph, the
ultra-modified P-51 racer Voodoo shot by and was gone. Its first pass
over the three-kilometer straightaway took 12 seconds.....

https://www.airspacemag.com/flight-t...zxGuMiOXBHp.99




....so what's the deal with string hanging drown from the cowling on
'Voodoo'?...is it a 'feature' or something left behind accidentally by the
mechanic?

Last time a saw a string like that it was attached to my wife's Tampax.




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