Search found 190 matches

by sproggy
Mon Sep 24, 2018 6:14 am
Forum: Small outboards
Topic: Utility skiff build question
Replies: 19
Views: 1213

Re: Utility skiff build question

Don't get hung up on your 'missing' inch, by the way. Remember you have to skin the boat and that will add slightly to the length (adding material ahead of the stem).
by sproggy
Mon Sep 24, 2018 6:12 am
Forum: Small outboards
Topic: Utility skiff build question
Replies: 19
Views: 1213

Re: Utility skiff build question

On most of the outboard designs the keel curves up to meet the stem - in other words it is horizontal from the transom a certain way forward but then curves up (or down, with the boat upside down) to meet the stem ahead of the previous frame. So if you've bolted the keel up to the stem first it will...
by sproggy
Sun Sep 23, 2018 2:54 am
Forum: Hankinson designs
Topic: Barrelback Modifications
Replies: 3
Views: 103

Re: Barrelback Modifications

If you used aluminium motor stringers how would you attach the frames to them? By the time you'd figured out welded brackets and/or some sort of compatible bonding method I doubt you'd save a significant amount of weight and you would just end up making your life more difficult for little to no bene...
by sproggy
Sun Sep 23, 2018 1:29 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 86
Views: 14206

Re: UK Zip Build

I've been making some progress recently. Keel and chines fitted: http://boatbuilders.glen-l.com/wp-content/gallery/inboard-zip-by-ian-spring-welwyn-garden-city-uk/chines.jpeg?i=226000030 And now the reason for the over-height build form uprights will become apparent. Ready to roll: http://boatbuilde...
by sproggy
Mon Sep 17, 2018 11:51 am
Forum: Small outboards
Topic: Smallest motor on Zip?
Replies: 6
Views: 188

Re: Smallest motor on Zip?

Pretty much all inland waterways (rivers and lakes) in the UK are subject to a 4/5/6mph speed limit with the exception of a few small waterski lakes. The only place you can go faster is on the sea or estuaries and the Zip isn't built for speed on rough water. You might get the odd super-calm day on ...
by sproggy
Mon Sep 17, 2018 8:58 am
Forum: Small outboards
Topic: Smallest motor on Zip?
Replies: 6
Views: 188

Re: Smallest motor on Zip?

How big do you go 'just in case'? :lol: I figure 10hp would easily be enough for 6mph but a 15hp would be working less hard.... I don't think many of the boat speed calculations are effective at such low powers/speeds for planing hulls. I was originally going for a Yamaha F25 which is a twin (unusua...
by sproggy
Mon Sep 17, 2018 7:39 am
Forum: Small outboards
Topic: Smallest motor on Zip?
Replies: 6
Views: 188

Smallest motor on Zip?

I know people usually ask "what's the biggest motor I can fit to a.......?". Well this is the opposite. What's the smallest motor anyone's fitted to a Zip? I spent some time wandering around boats last week and a 25hp Yamaha motor, which I was planning around, is physically pretty big. Giv...
by sproggy
Fri Aug 31, 2018 7:35 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 86
Views: 14206

Re: UK Zip Build

The sheerline will be raised 3" in total but the sheer timber itself is raised only 1" at the bow, progressing to 3" up at the transom. The additional 2" at the bow will be achieved with a 2" thick cover board edge (not the entire cover board) which will taper down towards t...
by sproggy
Fri Aug 31, 2018 1:31 am
Forum: Small outboards
Topic: UK Zip Build
Replies: 86
Views: 14206

Re: UK Zip Build

New stem and breasthook fitted. I nearly made the same mistake as the first time with the height of the blocking - I've raised the sheer by an inch (forward) so I raised the blocking an inch to compensate.......except I should have dropped it an inch instead. I wasn't thinking upside down. So the or...
by sproggy
Fri Aug 24, 2018 3:21 am
Forum: New Members, Please Introduce Yourself
Topic: New member kent UK.
Replies: 1
Views: 296

Re: New member kent UK.

Welcome, Stuart - there are a few of us in the UK.

A flying saucer is perhaps an unusual choice for estuary use - you'll need to choose calm days! And you're using jet power? I'll watch your build with interest as I considered jet power for my Zip too.
by sproggy
Mon Aug 20, 2018 6:23 am
Forum: Epoxy
Topic: Epoxi and European Oak?
Replies: 6
Views: 1622

Re: Epoxi and European Oak?

I'm using West epoxy with oak and it seems fine. In fact because of some of the scare stories I tested a few bonded off-cuts - both oak to oak and oak to ply. I even soaked one in water (to allow the oak to expand) for a few days and still the wood failed when I attacked it, not the epoxy. It wasn't...
by sproggy
Thu Aug 16, 2018 8:07 am
Forum: New Members, Please Introduce Yourself
Topic: Hello from Belgium
Replies: 3
Views: 239

Re: Hello from Belgium

Welcome, Folgore!

Are you thinking of building a Glen-L design? Have you any thoughts about which one? I'm building a Zip in the UK.

Ian
by sproggy
Wed Aug 08, 2018 12:56 am
Forum: Small outboards
Topic: Stephens Zip
Replies: 63
Views: 4086

Re: Stephens Zip

Wait on the notches until you are ready to lay in the shears and chines so you can angle them based on the direction that the longitudinals bend. I think he meant the notches in the build form for frames 5 1/2 and 4. I just cut mine with a regular saw, slightly shallower than specified. Then final ...
by sproggy
Thu Aug 02, 2018 7:22 am
Forum: Electric Power
Topic: Electric drive "ED"
Replies: 4
Views: 292

Re: Electric drive "ED"

Ah, if you're getting rid of the belts then that opens up more power options. Watch the gearing, though. The ED design allows you to effectively gear the motor to the outboard leg via different sized pulleys. If you're going for a direct drive via a coupling you won't have that capability. Electric ...
by sproggy
Thu Aug 02, 2018 6:36 am
Forum: Electric Power
Topic: Electric drive "ED"
Replies: 4
Views: 292

Re: Electric drive "ED"

Steering would be more similar to an outboard than to an inboard because you steer by turning the outboard lower leg, directing the thrust where you want it. So you'd have good manoeuvrability at low speed which you don't get with an inboard and separate rudder. On the downside, low speed is the onl...

Go to advanced search