[PUP] Ok, what is your thoughts about get home engines

[Ron Rogers]

Unless they used two different boats, the comparison is not valid - period!
With one engine running, the other engine's prop is dragging through the
water. The owner of a Nordhavn 68 with twin engines estimates that he uses
10% more fuel than a single engine vessel. To save fuel, he realizes that he
could install two controllable pitch props (and their special shafts) at
significant cost and remove this as an issue by feathering one prop. This
also gives him control over the optimal pitch for his props in varying
conditions plus instant reverse. Either or both these strategies will save
fuel.

Ron Rogers

-----Original Message-----
From: Mark

-- On Mon, 10/27/08, bob england <bob_england at hotmail.com> wrote:
> I lean toward a twin setup, for lots of reasons. But, if you

Previously I would have gone for a single, less total running hours, etc.
However, I've been keeping in tabs on Dick Vermeulen's P47 project.  The
test hull measured (flat water, full load) better fuel economy with twins
than a single at the same speed.  Twin volvo D-3s (160hp) 1500rpm 8.9 knots,
1.6 total gal/hr.  vs one engine, 2100 rpm, 8.7 knots, 2.8 total gal/hr