Test elevations all between 400 and 1500' msl.

Airframes: W/H 28% Extra and Edge, Weights deliberately varied from 17 to 21 lbs. W/H 29% Ultimate, weight: 18lb. 9 oz.
Brison 3.2, MSC 22-8 prop, Bisson down draft muffler/diverter- 6700-6800rpm
Mejzlik 22-8: 7300
Zinger 22-8: 7450
Zinger 22-10: 7250
Menz "S" 22-8: 72-7300
Biela 22-8: 7000

Best 3D performance of props used: MSC 22-8
A pair of these could easily handle a 100 lb.plane, then again, so could a pair of 35cc engines if length of t/o roll and performance envelope where not major considerations.

Brison 6.4, 105cc, Bisson rear angled mufflers, Airframes: 35% Giles 202 and 35% Sukhoi. Aircraft weights: 26 lbs, +/- 1/2 lb.
MSC 26-10: 57-5800 rpm
Menz "S" 27-10: 61-6200
Mejzlik 27-10: 6050-6150
Biela 28-10: 6100
Fuchs 27-10: same as Mejzlik 27-10

Best climb performance of props used: Biela 28-10

BME 115, stock mufflers.
I haven't seen rpm counts of less than 6600 rpm with any 27-10 prop to date. Some much higher.

Taurus 3.2 info when I get around to logging some of it.