Good Madewell .49s are usually fairly high priced and sought for enegines. Many years ago I flew one on a Cl Sterling Corsair, very overweight, and it really went well.

One of the very strange items that really surprised me was that with the Madewell, the corsair flew FAST on a 10-8. It was never really up using a 11-5, 6 or 7. While fast straight and level, aerobatics just were not in the book. Doing a wing-over required gentle pull-outs starting before reaching the 45 degree line on the down side.
I changed out to a Super Cyclone, and with a 12-6 at an estimated speed about 2/3 of the Madewell, I could do Lazy-8s easily under an estimated 50 degree height using 60 ft lines. Loops, wingovers, etc. with a HEAVY scale model were fun.

I now have a new-in-box Madewell .49 that was used only for display. Some day....??? Regardless of the Corsair incident, I am a firm believer that a Madewell .49 is a work of art.