I have noted that most Lancair's that crash also burn enthusiastically
but I don't know what the mechanism is.

Colyn,

 

Hmmmmm,  I couldn't find the data to support that.  I do know of a 235/320 that had the nose gear collapse on landing and had an engine compartment fire - but it was upright so the pilot got out and before helpers put out the fire, he went back for baggage or Serengetti sunglasses or something like that.  The cowl was a complete loss and the right side, wing root and canopy suffered damage - it didn't quite get to the header tank.

 

Jeff,

 

Not too many people would be able to get out of a forward hinged canopy Lancair resting inverted even if no head injuries occurred.

 

Brent,

 

<<<<<<<<<<The header tank is another matter altogether. I don't think it is ever a good idea to have large quantities of flammable or hot fluids in the passenger compartment.

>>>>>>>>>>>>

 

I don't think the burn history of header equipped Lancairs is any worse than those without.