Bill,
You dog! I looked for one of those critters for eons and look at the deal you got!
They were only for sale domestically in Japan and to selected competitors worldwide. The grey market skirted that, though. They were not intended to be run at anything over 11,000 RPM (set to 10-1/2" pitch) but noise cheaters (like the entire Italian pattern team in '83) used them to skirt the noise test at high pitch and then flew at reduced pitch and high RPM. Yeah, they blew up that way too! I worked as the timer on one of the two flightlines at that Worlds, and I distinctly remember one of the Mexican team members using such a grey market item on a flight where he was on the hairy edge running over the time limit. He landed flat and fast at maybe 1/2 throttle to get back to the runway quickly, threw the prop into flat/reverse and then revved the engine. It only rolled an 1/8 of a mile that way!
When E-Pattern was first being seriously discussed after the high-current nickel metal hydrides first happened, a few of us theorized that running the motor (brushed back then!) at full voltage and varying the pitch to control power delivery would be a good idea.
Thanks for shaking a few cobwebs loose!
Dean Pappas