hi phoenix
it could very well be something different, and unfortunately, no more information is given. i'm learning that there were a plethora of prototypes, and experimentals in the 50's and 60's that didn't make it to production. i have another pic i found here of an early m151 with a small turbine motor, but i'll have to go back and look through a bunch of issues to find it. i just took a guess that it may have been some how tied to that project.
cheers!!
mike
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