12.5 x 10.5W 10,400 on EQ60 10,800 on EQ63 @ 500mm with Hanno etc
12.5 x 11W 10,300 on EQ60 10,700 on EQ63 @ 505mm with Hanno etc
12.5 x 11.5W 10,000 on EQ60 10,400 on EQ63 @ 510mm with Hanno etc
13 x 10.5 new development for the .80 engines. For .80 size engines, use the higher volume EQ62, EQ62N or even better the EQ63
The 13.25 x 10 and 13.75 x 10 are props developed for the early .120 4 strokes, now proving excellent for use on the more powerful engines, with reshaping of the tip to a more modern shape.
The recommended Bolly set-up is an OS Hanno using a 12.5 x 10.5W or 13 x 10.5 c/f, with EQ63 pipe set at 5355mm length. The engine has been de-compressed. This set-up is quiet, smooth and powerful.
4 Strokes
We have had many new developments for the 4 strokes. The new FS124 pipe and CD header system is working very well. Some of the smaller props being developed for the new .120 2 stokes also suit the later more powerful 4 strokes.
Pipes = FS122 or FS 124, coupled with the CD exhaust elbow & header.
3B & 4B Props = 14.5 x 10 4B 15.5 x 13 3B 15 x 14 3B 14 x 10 3B
2B Props = 16.5 x 12 16 x 14 15.5 x 12.5 15 x 11
The older design props for earlier 4 stokes, such as 14 x 13 3B, 14.5 x 14.5, 14.5 x 13.5, 14.5 x 12.5 and 14.5 x 12W are no longer suited to modern pattern, but make excellent choices for ‘sports’ pattern.
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