OS MAX H80 /R.C. 1971 W BISSON LOW NOISE MUFF
OS MAX H80 /R.C. 1971, with Bisson low noise muffler. With MAS S2 Scimitar 13x6 propeller 10000 rpm.
This was with about 500 rpm rich setting. The engine was definitely not fully broken in as it has two rings
and was near the end of a third tank of fuel when it was measured. The two plugs were OS#7 and the fuel
was 5% nitro, 25% oil made by mixing 2 oz of castor oil with 30 oz of 5/20 Byron fuel.