Indeed, maukaonyx is correct although it is the Midwest Aerostar 40. Built in two sizes forty and twenty all were kits that I am aware of . It is a fine trainer and my second choice only to the Sig Senior Kaydet Long ago I used one with fifty ounces of fuel for my personal best cross country along seventyfive miles of Route 66.
No modifications at all are required so do not get caught up in that game. FP's along with the later FX.s and the more recent AX,' s are absolutely at the top of my favorite glow engines and yes even over the Four strokes.
The carb on all sizes of the FP's is a bleeder type, An example of simplicity. Very easy to set midrange but is backward from the double needle types ( Leaning midrange is done by opening the screw, not closing). I would be pleased to explain a very simple method if interested?
John