Was given a JS1 engine start demo at Lake Keepit, it's pretty simple. Correction, very simple.
We were right next to it, in an open hangar and it wasn't deafening.
Also witnessed a powered JS1 low pass, quiet compared to a straight-pipe exhaust airplane. It is loud compared to a normal unpowered glider low pass.
While putting the glider away today, there were two (52 Lb thrust) turbine runs after overhaul at JetCat. Believe an air compressor is as loud at an equal distance, much louder if there's a die grinder involved.
Flown with Bob Carlton in the Bonus Jet. With the same (247 Lb thrust) TJ100 as used on the Salto it is quite a bit noisier than a JS1J (92 Lb thrust) but still not hideous when you consider it's a self-launcher that can out-climb most towplanes. Perhaps it's just odd to look at a glider and hear that sound.
Jim


On Monday, June 1, 2015 at 12:37:12 PM UTC-7, wrote:
I'll believe it when I hear it.
Tom