Search found 70 matches

by Chris B
Sat Jan 25, 2020 10:47 pm
Forum: General Topics
Topic: Amal Throttle Control - Tiller Clamp Screws.
Replies: 14
Views: 6679

Re: Amal Throttle Control - Tiller Clamp Screws.

If the throttle control "they" have looks like the one in the picture and has similar dimensions, they'll know if it's the same unit as theirs or not. As do you. So for identification purposes, a side elevation is not necessary. We're talking about two clamp screws for an Amal throttle control here....
by Chris B
Sat Jan 25, 2020 9:21 pm
Forum: General Topics
Topic: Amal Throttle Control - Tiller Clamp Screws.
Replies: 14
Views: 6679

Re: Amal Throttle Control - Tiller Clamp Screws.

In regard to a request for a picture, the Amal throttle control to which I referred is this one: https://www.ebay.co.uk/i/183998249400 However, as the picture doesn't tell you a great deal without dimensions, I shall revert to words. On the unit I have in front of me: The tiller clamp's screw holes ...
by Chris B
Sat Jan 25, 2020 8:07 pm
Forum: General Topics
Topic: Amal Throttle Control - Tiller Clamp Screws.
Replies: 14
Views: 6679

Re: Amal Throttle Control - Tiller Clamp Screws.

Aha! Bronze inner cable! Thanks for the heads-up on that possibility Charles. Different animal from brass and a whole lot better in bendy situations. For example, I've a superb vintage Hughes & Son compass and its integral shock absorbing mechanism uses 4 bronze leaf springs. After 80 years of flexi...
by Chris B
Sat Jan 25, 2020 5:22 pm
Forum: General Topics
Topic: Amal Throttle Control - Tiller Clamp Screws.
Replies: 14
Views: 6679

Re: Amal Throttle Control - Tiller Clamp Screws.

Returning to the question about brass control cable wire... As said earlier, I haven't encountered such stuff - and also as said earlier, there might be very good reasons why brass isn't used. However, if in the interests of science you feel like experimenting, you could perhaps try the stuff that's...
by Chris B
Sat Jan 25, 2020 4:06 pm
Forum: General Topics
Topic: As of Today
Replies: 13
Views: 6749

Re: As of Today

I'm with Sandro on this one... I made the mistake of thinking that retirement was all about putting one's feet up and relaxing. Was lucky enough to be able to retire quite early - but In the ensuing years I've become so busy that these days I wouldn't have time to go to work even if I wanted to. Am ...
by Chris B
Sat Jan 25, 2020 3:53 am
Forum: General Topics
Topic: Amal Throttle Control - Tiller Clamp Screws.
Replies: 14
Views: 6679

Re: Amal Throttle Control - Tiller Clamp Screws.

I haven't encountered brass control cable. I wonder if that's because stretch and / or early fatigue failure might make it unsuitable. Presumably you're concerned about galvanised cable eventually succumbing to rust. My solution to that problem was to make my own Amal throttle cables from stainless ...
by Chris B
Fri Jan 24, 2020 5:21 pm
Forum: General Topics
Topic: Amal Throttle Control - Tiller Clamp Screws.
Replies: 14
Views: 6679

Re: Amal Throttle Control - Tiller Clamp Screws.

Hi Rick - I agree with you. Avoid fitting the screws "dry". Use a smear of lube. While I'm here, I forgot to mention that the Amal throttle clamp screws available from Stig Fasteners have the correct filister head. Within about 30 minutes of ordering mine online, they emailed me to tell me the order...
by Chris B
Fri Jan 24, 2020 4:05 pm
Forum: General Topics
Topic: Amal Throttle Control - Tiller Clamp Screws.
Replies: 14
Views: 6679

Amal Throttle Control - Tiller Clamp Screws.

I've yet to encounter an original (unrefurbished) Amal throttle control on a Seagull outboard that didn't have rusty tiller clamp screws. It's nice to have shiny screws but there seems to be quite a bit of uncertainty about the screw type used for the Amal throttle clamp. And having solved that prob...
by Chris B
Fri Jan 24, 2020 12:13 pm
Forum: General Topics
Topic: beautiful sunny sunday
Replies: 25
Views: 10846

Re: beautiful sunny sunday

Dudley Pope's writing was a mixture of nautical fiction (I'm thinking of his "Ramage" series of novels), and several volumes of historical non-fiction. Pope was also an experienced sailor: he spent a lot of time on seagoing sailing yachts, and during his time in the Royal Navy his ship (I can't reme...
by Chris B
Wed Jan 15, 2020 9:41 pm
Forum: General Topics
Topic: beautiful sunny sunday
Replies: 25
Views: 10846

Re: beautiful sunny sunday

HMS Victory's hull is approximately 70 centimetres thick at the waterline. I'm not sure why a 24 pounder apparently had more penetrating power than a 32 pounder. I do know, however, that a 24 pound ball tended to punch a relatively clean hole through thick planking, but a 32 pound ball did a less ti...
by Chris B
Wed Jan 15, 2020 12:44 pm
Forum: General Topics
Topic: beautiful sunny sunday
Replies: 25
Views: 10846

Re: beautiful sunny sunday

Sandro - Re: cannon ball penetration... The following is an extract from a table compiled in the late 18th century by the Royal Navy. The figures are empirical measurements generated by experiments using captured French naval cannons. (At that time, the data was of value to the designers of British ...
by Chris B
Tue Jan 14, 2020 5:32 pm
Forum: General Topics
Topic: beautiful sunny sunday
Replies: 25
Views: 10846

Re: beautiful sunny sunday

Sandro - Returning briefly to your comment about gun tackle operation, which I apologise for missing earlier... As you correctly suggest, if the available space had allowed the gun crew to haul in the opposite direction (i.e. with the mechanical effort on the travelling block) then the mechanical ad...
by Chris B
Tue Jan 14, 2020 4:01 pm
Forum: General Topics
Topic: beautiful sunny sunday
Replies: 25
Views: 10846

Re: beautiful sunny sunday

Sandro - Re: I would not know how to reckon the resistance of oak wood to penetration but to my eyeball 1 metre looks a little too thick. Yes, it's impressive isn't it? I read about the 1 metre penetration through oak in a technical article about the history of naval gunnery. I don't know if the fig...
by Chris B
Tue Jan 14, 2020 12:29 pm
Forum: General Topics
Topic: beautiful sunny sunday
Replies: 25
Views: 10846

Re: beautiful sunny sunday

Sandro - Approximate figures again... Using a 32 pound cannon ball (let's call it 15 kg) with a muzzle velocity of 450 m/s, I get an initial recoil velocity of 2.25 m/s. But on a real gun deck in the real world I'd expect inertia, friction and rolling resistance to reduce that figure, and the veloci...
by Chris B
Tue Jan 14, 2020 1:20 am
Forum: General Topics
Topic: beautiful sunny sunday
Replies: 25
Views: 10846

Re: beautiful sunny sunday

Sandro - Well, muzzle velocity would obviously depend on the size of charge used, but I gather that a bronze 32 pounder naval cannon could withstand a detonation load capable of producing a muzzle velocity of approximately 450+ metres/second. And if you run the numbers for the mass and momentum calc...