Professional BoatBuilder - February-March 2018

28 PROFESSIONAL BOATBUILDER

BUILDER PROFILE: Bertram

You go from rolling to dead stop even

when it’s blowing 35. It works, but

expensive.”

For auxiliary power generation the

Bertram team settled on Mase gensets

in the 35 and two 21-kW Onans in the

60, which Blackwell described as “a

whole di erent kettle of  sh” due to

power demands that include three to

four air-conditioning zones, including

the cockpit; Seakeeper gyros; multiple

freezers; a watermaker, and more.

Other equipment includes a Taylor

Made windshield, Sub-Zero appli-

ances, Fusion stereo, LED lights every-

where, so -close doors, and milled

aluminum airplane-style latches.

 e 35 is CE certi ed Category B.

All this is mocked up full scale in

the building next door to the main

building hall. During my visit a ply-

wood mock-up of the 60 interior was

set up on the  oor, including the main

saloon, dinette, galley,  ybridge, and

Caterpillar’s Cat  ree60 Pre-

cision Control system, which

integrates the engine with the

bow thruster.

Sea trials of the 35 with the

C7.1’s show wide-open throt-

tle speed of around 37 knots,

and a cruise speed of 28 knots

at 2,300 rpm, resulting in 1

mile per gallon [0.4 km per

liter] fuel burn.

A Seakeeper 5 gyro stabi-

lizer was installed in hull No. 7

of the 35. “If you don’t plan it,

you can’t do it,” said Blackwell.

“Originally we didn’t have

them; then we went back and

had Michael work it in. I was

shocked at how well they work.

A C7.1 500-hp (375-kW) Cater-

pillar diesel engine is lowered

into place on a 35.

Bertram171-ADFinal.indd 28 12/29/17 4:43 PM