Bertram31.com General Bulletin Board

Re: B31 with Yan 315

Posted By: Capt Partick McCrary
Date: Sunday, 13 November 2005, at 11:45 p.m.

In Response To: B31 with Yan 315 (Carlos Silva)

Carlos,

With 315hp & stock 15° shaft angle, the B31 will run bow proud all the way through 34 kts, providing it's loaded properly.

The rule of thumb for longitudinal loading is 60% of the weight aft of the forward engine space bulkhead & 40% forward of the forward engine space bulkhead.

The gear ratio should be between 1.5:1 & 2.0:1, running no more diameter in the wheels than 21" & max pitch around 24". Pitch and diameter must be ballanced to achieve full rated RPM from the engines under load.

Best regards,

Patrick

Messages In This Thread

B31 with Yan 315
Carlos Silva -- Saturday, 12 November 2005, at 10:51 p.m.

Re: B31 with Yan 315
Ken -- Sunday, 13 November 2005, at 12:03 a.m.

Re: B31 with Yan 315
Carlos Silva -- Sunday, 13 November 2005, at 9:43 a.m.

Re: B31 with Yan 315
Walter Kaprielian -- Sunday, 13 November 2005, at 10:30 a.m.

Re: B31 with Yan 315
bruce -- Sunday, 13 November 2005, at 8:32 p.m.

Re: B31 with Yan 315
Capt Partick McCrary -- Sunday, 13 November 2005, at 11:45 p.m.