Bob,
In all of the great videos I've seen of you and the jet-powered Silent,
I never saw you retract the engines in the air. Is it impossible
because of temperature? Or is it just a coincidence ?
Thanks
Uri

wrote:
Bob, my question is about approved types of fuel.

In the jet aircraft I fly, occasion use of av-gas is approved; however,
some aircraft have a limitation in their Flight Manuals as to how many
gallons of av-gas is allowable before a hot-section inspection becomes
mandated. Av-gas (100% or mixed) is useable in these aircraft for a
couple of reasons: as an emergency return-to-home fuel, and as a way to
control microbal growth in the fuel systems, particularly in tropical
environments.

The downsides of using av-gas in turbine engines are that it burns
hotter and deposits lead on the turbine blades (does the micro jet
engine use turbine blades and a containment ring?). The Lead deposits
reduce the engine's efficiency, and the higher exhaust gas temperatures
simply reduce the life of the components.

But when the chips are down, av-gas can be used...in jet-powered
airplanes. Thus my question: Can the micro-jet engine use av-gas?

Raul Boerner