Model Boat Mayhem - Forum

Dry Dock / Shipyard: Builds & Questions => Working Vessels => Topic started by: southsteyne2 on May 09, 2018, 08:57:57 AM

Title: Steam tug Joffre
Post by: southsteyne2 on May 09, 2018, 08:57:57 AM
 Hi all I have had plans of the steam tug Joffre for some years now and never got round to a start on it till now ,so here goes I will not be showing bit by bit detail as it has been described well on this forum previously in masterclasses, however this build is scratch built  will be 4 ft long with Yarrow boiler ,engine not decided yet please feel free to ask questions.
Cheers
John

 
 
Title: Re: Steam tug Joffre
Post by: derekwarner_decoy on May 09, 2018, 09:37:35 AM
Looking forward  O0 to any posts you can make John.......Derek
Title: Re: Steam tug Joffre
Post by: southsteyne2 on May 14, 2018, 04:54:27 AM
Thanks Derek Ive gone a bit further with the planking finished and ready for GRP  also mde a start on the Yarrow boiler but had a practice run with copper rods and very happy with the result ,the copper rods will braze to brass with suitable flux.
Cheers
John
Title: Re: Steam tug Joffre
Post by: southsteyne2 on May 14, 2018, 04:57:41 AM
Yarrow boiler hydraulic test to 160 psi working pressure 60 psi
Cheers
John
Title: Re: Steam tug Joffre
Post by: Jerry C on May 14, 2018, 11:29:28 AM
Love the boiler. Gonna need a good feed pump for that.
Jerry.
Title: Re: Steam tug Joffre
Post by: Mark T on May 14, 2018, 11:36:02 AM
Wow what an amazing boiler and lovely hull too - I’ll be following this :-))
Title: Re: Steam tug Joffre
Post by: Martin [Admin] on May 15, 2018, 04:27:40 AM
 
 :o  Amazing work!   Is that a 'Yarrow boiler'?
Title: Re: Steam tug Joffre
Post by: southsteyne2 on May 15, 2018, 05:10:44 AM
Hi and thanks for your kind comments yes t's a yarrow boiler copper brazed not too difficult a job mostly lining everything up but must confess I would not have attempted it without some great advise on this great forum ,in particular George ooyah2 who kindly sent me many good images and construction details.
The boiler holds approx 1 ltr water so a small engine driven pump will keep up with demand.
Cheers
John
Title: Re: Steam tug Joffre
Post by: southsteyne2 on May 17, 2018, 08:41:09 AM
Hi all I am contemplating no pun intended doing simulated hull rivets ,never tried this so need some feedback from you guys  ,I have a pic similar to Joffre which gives me some idea where the plates fit so has anyone used aluminium drink cans ? ,if so how are the pltes glued to the hull?CheersJohn
Title: Re: Steam tug Joffre
Post by: Neil on May 17, 2018, 06:39:25 PM

I have never used alli cans, but have seen the results of litho plates from a printers being used and glued on with epoxy resin.




however I have myself used 120 gram card/paper for plating which gives good results, and I used sanding sealer to seal from water...……


but now with the modern 2 part finishing epoxy painted over the exterior card plates have seen great results and superb watertight finishes on card...…….saves cutting your fingers on sharp alli cans.
Title: Re: Steam tug Joffre
Post by: southsteyne2 on August 24, 2018, 01:32:56 AM
Hi guys a bit more work on Joffre but very cold winter has kept me out of the shed so can't wait for warmer climes .CheersJohn