The F4 is IMMENSELY strong with with moulded carbon spars connected by steel bolts to carbon formers mounted in a glass fuselage with carbon and kevlar reinforcement. You cannot IMO compare a minimalist structure like a Hotspot (some early versions of which are known to have blown apart) with a BVM F4 which IS approved by the manufacturer for Pegasus installation. When I first flew MY F4 it had a Pegasus of LESS than 24 pounds of thrust.

As for overpowering Hotspot and BobCats etc and things one poster said he was doing it for speed, he wanted to go FAST fast, fast, , THATS when structural failure is likely.

But what does a Hotspot weigh, don't know, but is 36 pounds of thrust required to hover it.

But I repeat, just where DO we draw the line, (does the AMA still have rules about T/W ratios/) or as I asked earlier do we just wait until someone screws up big time and stand idly by waiting for him to do it ?

At least we are now discussing the issue and THATS a step forward.

Regards,

David G.