Search found 240 matches

by sproggy
Fri Mar 27, 2020 9:18 am
Forum: Power Boats
Topic: Building The Vera Cruise
Replies: 3147
Views: 657652

Re: Building The Vera Cruise

If I remember the theory correctly it's not the potential for leaks in the connecting pipe that makes it a bad idea. It's the fact that if one tank gets compromised (starts leaking, ingests water, mis-fuelled with diesel etc) and it's linked to the other tank then both are likely compromised and you...
by sproggy
Wed Mar 25, 2020 1:48 am
Forum: Boat Power
Topic: CVT scooter motor as inboard?
Replies: 4
Views: 315

Re: CVT scooter motor as inboard?

The Vespa motor has peak torque @ 5,000rpm and peak power @ 7,750rpm. By my rough calculations the rear wheel is spinning at around 1,436rpm @ 80mph. The missing information is what the engine speed is @ 80mph - there's no rev counter and the gearing is variable. But most sources reckon it is at or ...
by sproggy
Tue Mar 24, 2020 9:25 am
Forum: Boat Power
Topic: CVT scooter motor as inboard?
Replies: 4
Views: 315

Re: CVT scooter motor as inboard?

I ride a Vespa GTS300 to work. It's not as powerful as the Beverley (far cooler though 8) ) but otherwise comparable. At full throttle on the open road you're doing around 80mph with the little motor fighting against wind resistance (which is significant at that speed - motorcycles and scooters aren...
by sproggy
Mon Mar 23, 2020 7:45 am
Forum: Boat Power
Topic: CVT scooter motor as inboard?
Replies: 4
Views: 315

CVT scooter motor as inboard?

Maybe it's the result of prolonged confinement at home driving me slightly crazy but I'm back thinking about a way to make my barrelback Zip something other than outboard powered....and to come up with a solution before my build progresses beyond the point of no return as far as hull construction is...
by sproggy
Thu Jan 23, 2020 1:16 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 111
Views: 66723

Re: UK Zip Build

I took the plunge and set the circular saw on the boat: https://boatbuilders.glen-l.com/wp-content/gallery/inboard-zip-by-ian-spring-welwyn-garden-city-uk/ply_removed.jpeg?i=292024780 The vertical cuts still visible are through the ply layer only, not through the longitudinals themselves. Next job i...
by sproggy
Sun Jan 19, 2020 5:01 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 111
Views: 66723

Can't diagonal cold mould

I've hit a problem. Although the boat is faired I can't get 5.5" wide okoume ply to wrap around it. Not at 45 degrees. I've tried a couple of strips: https://boatbuilders.glen-l.com/wp-content/gallery/inboard-zip-by-ian-spring-welwyn-garden-city-uk/diagonal_moulding_attempt.jpeg?i=145671699 but othe...
by sproggy
Thu Jan 02, 2020 7:33 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 111
Views: 66723

Re: UK Zip Build

First forward, topside ply panel fitted over the Christmas break: https://boatbuilders.glen-l.com/wp-content/gallery/inboard-zip-by-ian-spring-welwyn-garden-city-uk/forward_hull_panel.JPEG?i=1306778099 The clamps are because I decided to use screws only every 6" rather than the 3" recommended - the ...
by sproggy
Thu Dec 05, 2019 6:58 am
Forum: Small outboards
Topic: Zip SA Build
Replies: 14
Views: 6686

Re: Zip SA Build

I would build the frames per the plans too. Not because having wider section side frames is a bad idea if you don't mind losing the interior space but because having full loop frames adds valuable stiffness during the build (like when you're bending the sheers or the ply topsides) and in particular ...
by sproggy
Wed Nov 27, 2019 7:32 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 111
Views: 66723

Re: UK Zip Build

It's a year and a day since I last posted a photo. So probably time for another one. Having spent a very long time fairing (and I'm still not done aft, where I have to work upside down) I reached the point where I was ready to stick some skin on the frame. I expect starting in the middle of the boat...
by sproggy
Fri Oct 11, 2019 8:25 am
Forum: Painting
Topic: Garage floor paint recommendations
Replies: 4
Views: 4535

Re: Garage floor paint recommendations

There's nothing that you are just going to be able to slap on with only minimal prep that's really going to last. Prep is the key to any coating system. I thought that too. But two years ago I painted my rough, oil-stained garage floor with this stuff after nothing more than a good vacuum: https://...
by sproggy
Wed Aug 14, 2019 1:43 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 111
Views: 66723

Re: UK Zip Build

My first thought when I read that was "I don't have the patience"! But using a belt sander with a fairly aggressive grit could do the job in an acceptable amount of time, I guess. And the advantage of sanding ply is that it's quite easy to see how far through you're going. It would be feasible. But ...
by sproggy
Tue Aug 13, 2019 8:32 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 111
Views: 66723

Re: UK Zip Build

It's an interesting idea. And would be more viable if I had a thicknesser! I've got one on my shopping list but for later in the project - I could bring it forward. I would have to test to see whether stripping the outer ply (or two) off caused any cracking issues when bending but it's supposed to b...
by sproggy
Tue Aug 13, 2019 7:17 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 111
Views: 66723

Re: UK Zip Build

This sounds a lot like a confession but it's my first post in 8 months and I've made pretty much zero progress. Lots of reasons (life gets in the way) but I'm trying to get moving again. I was prompted by the offer to get some 3mm (1/8") ply for a third of the regular price due to 'edge damage' caus...
by sproggy
Thu Apr 11, 2019 4:31 am
Forum: Power Boats
Topic: Decisions, Decisions
Replies: 9
Views: 4833

Re: Decisions, Decisions

Welcome. Regarding your idea to open up the bow to provide seating you should be aware that the hull was not designed to have people sitting there - it won't have much buoyancy forward and putting people there may make it difficult or impossible to get the boat to plane well depending upon where you...
by sproggy
Fri Apr 05, 2019 7:45 am
Forum: New Members, Please Introduce Yourself
Topic: news members from FRANCE
Replies: 7
Views: 3090

Re: news members from FRANCE

Welcome, Christophe! I am building a Zip in the UK and realised rather late on that it will not be suited to use on the sea except in very calm conditions. I have increased the freeboard on mine by 75mm but the fairly flat bottom is not suited to rough water. You might want to consider something wit...

Go to advanced search