Soaring in an Airplane (Katana DA-C1)

It seems that FAI sporting code section 3 definition 1.0.5 is very liberal in its definition of a motor glider

'Motor glider - A fixed wing aerodyne equipped with means of propulsion (MoP) capable of sustaining soaring flight without thrust from the means of propulsion'

So it seems that even a 737 can be considered a motor glider if one can find enough lift to provide 'sustained soaring flight' without the MoP.

Even more interesting, it seems that an ASEL pilot (without a glider license and without a self-launch endorsement) could get badges and set records in something like a Katana (14:1 glide, best glide around 70 knots). Of course the lift would need to be quite strong (I'm guessing min sink is 250-300 fpm) but mtn wave is a likely candidate.

I once soared a Katana DA-C1 in Reno wave this way, quite accidentally, with the engine at idle. Hmmm...with an engine noise level GPS Volklogger, perhaps I could stop the prop instead, and use the DA-C1 to get an altitude part of a badge?

Can anyone see any reason a DA-C1 airplane could not be used for soaring badges and records, assuming the engine and prop were stopped? Sure beats three rope breaks on tow

I know a pilot who got his 5 hour duration on a Cessna 180 back in the 1960's. He has over 150 hours enging off time flying in the Sierra wave. One thing he found was that after a couple hours of cold soaking the engine, it just wouldn't start. So he also had quite a few dead-stick landings

The barograph was attached to the firewall behind the instrument panel and provided a good indication of engine on/off.

I don't know for the US, but in France the regulation doesn't allow a pilot flying an aircraft registered as an airplane rather than a (motor)glider to stop the engine in flight. And of course the pilot should hold an airplane

we've got a picture around here of a Piper Tomahawk wave soaring with the prop stopped.. about 8000MSL in at Jean NV,

BT

I stopped the prop on a Pawnee at 8000 in sierra rotor, and climbed to 14,500 at an average of 1500fpm one day. Outclimbed several gliders who weren't quite in it, much to their suprise. Can I get some kinda badge for that?

Silver Altitude?