PowerCat Performance Calculator

[Guest625101138]

Alan
Well done. The feedback is appreciated.

Rick W

[sabahcat]

Interesting

in one of the latest Multihull world powercat magazines they had this with twin 60's on it





http://www.argusboats.com/main/flybridge_model.php

They reckon it would pull 16 on the fly

[L'eau.Life]

Nice size boat - although unlike mine it is a displacement design so the engines aren't trying to lift her out of the water. I would have preferred this but when I bought there were none around and I didn't want the cost (and time) involved in getting a new boat built.

For NZ my preference would still be diesel inboards though since when buying fuel all petrol is inclusive of road-user tax (supposedly to pay for road maintenance) whereas since we are primarily an agriculture-based economy, for diesel that tax is applied directly to a road-registered vehicle as a separate mileage-based tax and therefore; marine, industrial and agricultural diesel is considerably less expensive. In Oz (where these are built) there is little difference in cost at the pump (diesel is actually slightly dearer/liter).

Interestingly, I understand Roger Hill (the designer of this model) originally worked under Ron Given and if you look at both of their work there are many similarities.

Cheers, Alan

[TollyWally]

Well done, that boat's received a lot of love! Did you fair the struts, keel, etc. as suggested by the designer?

[L'eau.Life]

Thanks, yes a lot of love but fortunately I enjoy working on my boats as much as I do using them.

I did all the fairing before replacing the motors but not flattening the stern section and with so little power at the time there was no appreciable difference. When upgrading the engines larger props were accommodated by slightly longer shafts (had to replace shafts anyway as originals were too thin) and moving the struts aft.