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>> Home > Boat Building Blogs > HMCS Sackville - WWII Corvette
>> Permalink
mdlbt.com/26184
HMCS Sackville - WWII Corvette Print Booklet
Author: gordc   Posts: 2   Photos: 11   Subscribers: 1   Views: 667   Responses: 12   |   Most recent posts shown first   (Show oldest first)

mdlbt.com/38468
HMCS Sackville - WWII Corvette - Posted: 10th Feb 2018
I haven't made a lot of progress in the past year but the funnel is ready for painting and I'm pleased with how the 4-inch gun has turned out.

Sea trials did not go well last summer. I had no success with the boiler - the burner still gave me trouble. I tried different sized jets but it still took over 30 minutes to get up steam and by then the fuel tank was empty. I'll build a larger tank before next summer.

Attached Photos - Click To View Large

Response by Dave M on the 12th Feb 2018
I should have read your earlier posts. The boiler is 10" long and I suspect the one heating burner at one end is not providing enough heat for the whole length. Most boilers are 5" max in length using that type of burner. You may need a couple of flat ceramic burners in the tube to heat the whole length but I am not sure if this is feasible. How did the original designer heat this boiler?
Response by gordc on the 14th Feb 2018
Hi Dave,
I like your idea of bringing heated feed water in a thermos flask.
As for using a flat burner, there are cross tubes in the flue so it wouldn't fit. When Spring comes I'll experiment with different size jets to get the optimum heat out of the burner.
Response by Dave M on the 14th Feb 2018
Yes that would be a problem. If you use an outside gas source to get to steaming pressure your gas tank may be able to keep your pressure for a sail.
A larger jet will use more gas so I guess it will be a suck it and see. Please keep us posted on your efforts and good luck.

mdlbt.com/26185
HMCS Sackville - WWII Corvette - Posted: 21st Feb 2017
About 25 years ago I started building a Stuart Turner double 10 steam engine and soon after, I decided to build a boat to put it in. The photos show how far I've got.

It's a model of a WWII corvette, HMCS Sackville. The original ship has been restored and is on display in Halifax, Nova Scotia.
I've built it to a scale of 5/16" to the foot in order to have a displacement of roughly 40 pounds, which I figured I would need to accommodate the steam plant. It has an overall length is 65" and a 10" beam. The 5/16" scale also means that I have to make all the fittings for the boat from scratch. I'm working on the 4" gun right now.

I had the hull in the water for the first time last September and discovered that the pitch of the propeller needed increasing and that the boiler couldn't make enough steam to keep the engine running at 600 rpm. The boat just sat there going nowhere.

I've increased the propeller pitch and enlarged the burner orifice on the centre-flue boiler to increase the heat input, so I hope to do better this summer.

Attached Photos - Click To View Large

Response by figtree7nts on the 11th Feb 2018
Great project thanks for sharing!
Wish you much success with it!
Response by gordc on the 11th Feb 2018
Hi Taffy, thanks for the support. If I can't sort the boiler out this summer, I'll admit defeat and finish the ship as a static model.
Here's hoping.
Response by RNinMunich on the 12th Feb 2018
Hi gord(on?), so far so good👍 For heaven sakes DON'T GIVE UP! 😲
If all else fails - use bloody great nails!! 😉
In this case perhaps a half decent brushed motor, the 'Flowers' weren't greyhounds anyway 😁 More power to your boiler, Cheers Doug 😎