Please Note: All above figures are only a guide. Individual engines etc vary greatly as will the resultant performance. We have seen 400 rpm variations on the above.
For information updates, ask for the Bolly ‘Pattern Products’ Newsletter & price list.
PROPS FOR SPORTS R/C PATTERN
Over the years pattern has changed from a high revving, conventionally muffled engines using small props to the currently used quiet pipe, low revving engine, and more recently the 120 4 stroke.
We make propellers to suit all these types of flying and C/F pipes for the piped engine and 4 strokes. We also cater for the novice pattern flyer using the .45 sized engine, piped or conventional style.
For the .60 engine using a pipe we recommend:
The 'narrow' and the popular "QT' style props are best suited to the short stroke engines. Popular with the ‘sports’ pattern flyer.
12 x 11 QT 10,500 on EQ60 and OS FSR etc. @ 500 mm pipe length.
12 x 12 N 10,000 on EQ60 and OS FSR etc. @ 510 mm pipe length.
12 x 11 N 10,300 on EQ60 and OS FSR etc. @ 505 mm pipe length.
12 x 10 N 10,800 on EQ60 and OS FSR etc. @ 490 mm pipe length.
For the .45 engine using a conventional muffler we recommend:
10.5 x 6.5 These are in order of load on
10.5 x 8 the engine, approx 14 000 to
10.5 x 6.25 3B 12 000 depending on engine etc.
9.5 x 6.5 4B
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