bertram31.com

Huh funny had a 5kw northern lights in the cabin for 9 years and am still alive so are a fair number of members on this board who fished with me. The unit pulled air from the engine side and was sealed in a hush box we made. Had it ever need be removed it would fit through the door. Seemed very wel...

Bertram 35

Every little bit counts where I can gain some extra speed and efficiency so even if it were 2 knots extra I'd be okay with it. The cummins are some solid engines and although I may eventually repower to a bigger powerplant I have a feeling this pair will last for years to come so I've got to make it...

In rough weather, your pocketed props will be spending a load of time out of the water. Fine for a flat calm day, but I wouldn't do it. Talking with you guys I am second guessing its application in a 31. Spoke with a few guys in FLIBS '17 including some reps from Cummins who recommended the pockets...

http://bertram31.com/newbb/viewtopic.php?f=2&t=12127&p=112312&hilit=prop+pockets#p112312 http://bertram31.com/newbb/viewtopic.php?f=2&t=7314&p=70453&hilit=prop+pockets#p70453 http://bertram31.com/newbb/viewtopic.php?f=2&t=7926&p=76756&hilit=prop+pockets#p76756 http://bertram31.com/newbb/viewtopic.p...

Anybody have any experience with prop tunnels on a Bertram 31? Will be installing a pair from Cabrera. He has specified a distance between the centre of the strut supports on each tunnel to be 58-3/4". With this measurement, the shaft centreline is now extending closer to the gunnels than originally...