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by jacquesmm
Sat May 02, 2020 12:25 pm
Forum: Power Boats
Topic: CT22 question for Jacques
Replies: 2
Views: 105

Re: CT22 question for Jacques

The recommended HP is calculated with a normal load: people, gear, fuel.
Since a 115 HP is the same weight, you could go for that size but ti is overkill.
The transom can take much more but exceedingly heavy engines mean you"ll have bad trim, bad performance.
by jacquesmm
Sat May 02, 2020 12:23 pm
Forum: Small Boats
Topic: V12 - Bottom fabric
Replies: 7
Views: 233

Re: V12 - Bottom fabric

Don't waste $ and labor with Kevlar. It's overkill and almost impossible to do a clean job without vacuum bagging.
A light woven fiberglass is fine or much easier, a coat of epoxy mixed with graphite powder. I have that on my FL12 since 12 years, no scratches.
by jacquesmm
Fri May 01, 2020 10:33 am
Forum: Power Boats
Topic: Mangusta 20 Question for Jacques
Replies: 1
Views: 76

Re: Mangusta 20 Question for Jacques

Fast.

It all depends on the displacement of the boat. Give me a weight of the boat finished and loaded with everything, crew and fuel and I will calculate a weight.
One of the first builders reported 55 mph but I don't remember what the engine was.
I would say 45 to 60 depending on engine and load.
by jacquesmm
Fri May 01, 2020 10:30 am
Forum: Power Boats
Topic: FAST SKIFF 17 CUTTING DIMENSIONS
Replies: 3
Views: 124

Re: FAST SKIFF 17 CUTTING DIMENSIONS

1. Clamping board: see drawing B284/13. It shows the motorwell side and the notch for the clamping board. That notch is the height of the clamping board. It is marked 10-7/8. 2. Motorwell sides are on that drawing. I suggest to build according to the sequence I list in the building notes. Once you c...
by jacquesmm
Fri May 01, 2020 10:10 am
Forum: Power Boats
Topic: FAST SKIFF 17 CUTTING DIMENSIONS
Replies: 3
Views: 124

Re: FAST SKIFF 17 CUTTING DIMENSIONS

Give me a few minutes. It's probably all there since many boats have been built.
by jacquesmm
Thu Apr 30, 2020 12:16 pm
Forum: Sail Boats
Topic: Moonfish Plans questions for Jacques
Replies: 1
Views: 501

Re: Moonfish Plans questions for Jacques

The panels meet at their inside edges.
by jacquesmm
Thu Apr 30, 2020 12:15 pm
Forum: Power Boats
Topic: CS25 Question
Replies: 1
Views: 115

Re: CS25 Question

Yes, it has been done. See the pictures of the CX25. The builder modified the cabin design and I don;t like the looks but the boat runs well with an inboard.
You simply beef up the stringers spaced as needed for the engine mounts. You should be familiar with inboards installation: alignment etc.
by jacquesmm
Thu Apr 30, 2020 12:13 pm
Forum: Power Boats
Topic: scaled uo OD18
Replies: 6
Views: 216

Re: scaled uo OD18

Either advice, Barraman or Jayson is good. The idea is to work in a decimal system, it makes scaling very easy.
by jacquesmm
Thu Apr 30, 2020 12:11 pm
Forum: Builder's Power Boats
Topic: SOBX Little Big Boat GV15
Replies: 58
Views: 2113

Re: SOBX Little Big Boat GV15

Correct, the skeg is optional. For planing boats in that size, if I show a skeg or if someone wants it, I specify a 1x1 or a 1x2 on edge. Nothing fancy. See my notes about appendages here:
viewtopic.php?f=2&t=63623
by jacquesmm
Wed Apr 29, 2020 1:35 pm
Forum: Power Boats
Topic: Carbon fiber grab rail
Replies: 7
Views: 207

Re: Carbon fiber grab rail

Good point by Larry A and that is why, when I specify such carbon tubes, I always finish with an outside layer of glass over the carbon. A carbon tube that explodes will splinter, it is dangerous. Another point to consider is compression. To give an example, I built a tubular railing around my foam ...