Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1] 2   Go Down

Author Topic: Rendal gunboat HMS Mastiff 1871  (Read 11059 times)

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Rendal gunboat HMS Mastiff 1871
« on: September 17, 2014, 03:52:59 pm »

Hi


I have been building this gunboat model for a while, so thought it about time to pop a few images on the forum.


HMS Mastiff was built at Armstrong's on the river Tyne in 1871, part of a group of boats what became known as the flat iron gunboats.


The model uses the grp hull by models by design, everything else is built from scratch.




Ian
Logged

cdsc123

  • Guest
Re: Rendal gunboat HMS Mastiff 1871
« Reply #1 on: September 17, 2014, 05:23:29 pm »

Magnificent workmanship  :-))


I came upon this drawing recently I hope it is of some use;



Logged

Bob K

  • Bob K
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,686
  • Location: Windsor
Re: Rendal gunboat HMS Mastiff 1871
« Reply #2 on: September 17, 2014, 06:43:36 pm »

Really nice Ian.  Excellent detailing  :-))
Logged
HMS Skirmisher (1905), HMS Amazon (1906), HMS K9 (1915), Type 212A (2002), HMS Polyphemus (1881), Descartes (1897), Iggle Piggle boat (CBBC), HMS Royal Marine (1943), HMS Marshall Soult, HMS Agincourt (1912)

raflaunches

  • Global Moderator
  • Full Mayhemer
  • *****
  • Online Online
  • Posts: 3,681
  • The Penguins are coming!!!
  • Location: Back in the UK, Kettering, Northants
Re: Rendal gunboat HMS Mastiff 1871
« Reply #3 on: September 17, 2014, 07:31:13 pm »

Beautiful workmanship Ian, especially the gun and the little winding mechanisms on the cowl vents. :-))
Logged
Nick B

Help! The penguins have stolen my sanity, and my hot water bottle!

Illegitimi non carborundum!

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #4 on: September 17, 2014, 08:25:50 pm »

Thanks, Bob and Christian & Nick


Christian, where did you find those drawings, if you don't mind me asking?


I thought that I had most of the available reference material on these, just goes to show there is always something else hidden away!


A little bit about the design......


HMS Staunch, the original 1867 Rendal gunboat, was designed and built at Armstrong's. Fitted with an 9" Armstrong smooth bore, muzzle loading gun. On tests the boat proved to be a sound design, and orders were placed for a further 20 craft, built by different ship yards, with modifications to be made accordingly.




The Armstrong gun on these boats was a 10"muzzle loader, which was originally designed to be loaded below deck. The gun platform was to be raised and lowered on hydraulic screw jacks, one at each corner of the gun platform. 
This idea was abandoned for Mastiff and subsequent boats, because the rate of fire was extremely slow, at 6 to 8 minutes per fired round. because of the reloading procedure.


The boat was 85 feet in length, 26 feet beam and a draught of 6 feet.
two sets of single cylinder engines at 200 IHP giving a designed speed of 8.5 knots
Complement of 30 officers and men.


Mastiff was renamed in 1914 to Snapper, put on the sale list in 1919 and sold for scrapping 28.11.1939.


Everything that should move in reality, moves on the model. The gun carriage slews on the rollers, elevates using the rack, recoils on the bed way, the run back winches, have working gears, and when rigged will run the gun back to the firing position. All the locking pins are removable, and suspended on 40 links per inch chain.


I think in total there are over 350 parts to the weapon, all brass, aluminium and styrene. and about 290 man hours to machine and build it.




Ian





Logged

cdsc123

  • Guest
Re: Rendal gunboat HMS Mastiff 1871
« Reply #5 on: September 17, 2014, 08:32:14 pm »

Hi Ian


The full size version can be downloaded here;


http://russiannavy.net/militaryPhotos/engineering/rn/ant_class.jpg



Logged

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #6 on: September 17, 2014, 09:14:06 pm »

Thanks Christian :-))




Ian
Logged

cdsc123

  • Guest
Re: Rendal gunboat HMS Mastiff 1871
« Reply #7 on: September 17, 2014, 09:34:14 pm »

Logged

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #8 on: September 17, 2014, 09:40:14 pm »

Hi Christian,


Thanks for the link, no I have not seen this one. Nice model.




Ian
Logged

ballastanksian

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,447
  • Model Boat Mayhem inspires me!
  • Location: Crewkerne
Re: Rendal gunboat HMS Mastiff 1871
« Reply #9 on: September 17, 2014, 09:58:16 pm »

Beautiful gun Ian! I cannot praise it enough. I thought it was static but it seems to do everything but fire! I cannot wait to see it complete. Work like this inspires me with my builds. Taa gents.
Logged
Pond weed is your enemy

derekwarner

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,463
  • Location: Wollongong Australia
Re: Rendal gunboat HMS Mastiff 1871
« Reply #10 on: September 17, 2014, 10:16:43 pm »

Amazing detail on the cannon Ian  :-)) ...from the plan view ...it appears that the cannon can slew about 15 degrees to port & stdb.....but all of the loading must pivot on the fwd V shaped bracket  <*<.....and are those haul back pulleys under the barrel? or are they a form of recoil arrester?

But you have to question the wisdom of the Admilitary by placing the WC head & WC urinal so close to the cannon........would be enough to scare the sh*t out of anyone on the throne when the cannon fired  {-) .............Derek
Logged
Derek Warner

Honorary Secretary [Retired]
Illawarra Live Steamers Co-op
Australia
www.ils.org.au

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #11 on: September 17, 2014, 10:58:54 pm »

Hi Derek,


The slew angle is 15 degrees either side of centre.


These gunboats were really designed to be a self propelled semi fixed gun battery.
The idea being a pair of anchors would be dropped, in a wide triangular formation. Then the boat would run astern about 60-80 feet back from the anchorages.
Then using the large steam capstan on the main deck, winch either the port or starboard chain cable in or out to slew the entire boat.


The forward V bracket is just the pivot point. The actual recoil loading, was taken up by a heavy rope cable running from ring eyes, attached to the lower inside face of the forward curved bulwark. Then through a hole, in the rear of the gun casting.


There are a series of flat parallel metal rods, that run down between the side rails of the carriage, with a forked shape device which applies friction to the rails, thus damping the recoil of the weapon. Remember this is 1871, pre hydraulic damping!


The gun was returned to it's firing position, once reloaded, using the two large geared winching drums at the rear of the gun carriage. The arrangement used a series of wooden pulley blocks and rope, to winch the gun back into firing position.


Mr Armstrong and the Admiralty, made extremely good laxatives in this era of daring do!




Thanks to all for your kind comments :-))




Ian
Logged

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #12 on: September 19, 2014, 08:25:21 pm »

Hi


I have included additional images, to try and show the recoil damping system on the weapon.


The forked expanding device, may just be visible. This worked off a cam arrangement, from the large lever, applying pressure to the friction rails below.


The underside view, shows the bracing and reinforced ends, carrying the friction rails.
The minimum and maximum elevation of the weapon.
Weapon sighting apparatus, and firing mechanism.
Rope recoil arresting posts, and barrel end loop, which the rope ran through in a loop. Also the run back winch drums.


I have made some other progress, completing the large boat two part silicon rubber mould.
The master pattern from wood, clinker planked over a wooden former (in grey primer).
The initial rapid resin casting of the boat.


Ian

Logged

joppyuk1

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 201
  • Location: Suffolk
Re: Rendal gunboat HMS Mastiff 1871
« Reply #13 on: September 20, 2014, 09:38:10 am »

A marvellous model of a little ship. An inspiration to those of us who aspire to that quality but in reality cannot manage it. Doesn't stop us trying though. I love the detail.
Logged

warspite

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,757
Re: Rendal gunboat HMS Mastiff 1871
« Reply #14 on: September 20, 2014, 11:04:21 am »

this took me back to HMS Warrior, they had a couple of these looking guns, one off the stern and one off the bow (direct inline with the bowsprite so I have no idea how this would fire without hitting anything up front), love the quality  :-)) :-)) :-)) :-)) :-))
Logged
Operational - 1/72 LCMIII, 1/180 Sovereign, HMS Victory to be sailed
Non Operational - 1/72 Corvette, 1/72 E-Boat, 1/72 vosper mtb
incomplete, tug, cardboard castle class convert

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #15 on: September 20, 2014, 12:41:30 pm »

Thanks, for the kind comments, warspite & Joppy.


Anyone can build in the detail, with patience, good drawings and photographs. Don't use anything you're not happy with, I make lots of templates and mock ups, prior to cutting metal using 1 mm thick card.


Research is the key to above, although some educated guess work is needed at times.


I have found that sticking to a subject (warships) and era (mid-late 1800's) helps greatly. You sort of get tuned into the Late Victorian way of design and proportion, the more you read and study the subjects.


Ian
Logged

tonyH

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,336
  • Model Boat Mayhem Forum is the Best!
  • Location: Suffolk, England
Re: Rendal gunboat HMS Mastiff 1871
« Reply #16 on: September 23, 2014, 01:24:43 pm »

Beautiful job Ian!

I've just got back from a trip to Armstrong country and she wouldn't be out of place in either Bambergh castle or Cragside!

 :-)) Tony
Logged

mark w

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 272
  • "I stick my neck out for nobody"
  • Location: Whittier, CA.
Re: Rendal gunboat HMS Mastiff 1871
« Reply #17 on: September 25, 2014, 07:03:42 pm »

A marvellous model of a little ship. An inspiration to those of us who aspire to that quality but in reality cannot manage it. Doesn't stop us trying though. I love the detail.
Man, I hate people with talent  :}  . truly wonderful work  :-)) .
 
Mark
Logged
"If she can stand it, I can too, play it"

ballastanksian

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,447
  • Model Boat Mayhem inspires me!
  • Location: Crewkerne
Re: Rendal gunboat HMS Mastiff 1871
« Reply #18 on: September 29, 2014, 02:16:04 pm »

Even the patina of the gun barrel feels right. Definitly a contender for an award if entered in the Model Engineer exhibition.
Logged
Pond weed is your enemy

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #19 on: September 29, 2014, 06:44:08 pm »

Thank's for the kind comments!


The barrel is turned from aluminium, Bored out, and a brass liner fitted. Preparation wise, lightly air blasted with fine aluminium oxide grit, degreased, then etch primed(a very thin coat).
The finish coating was brush painted with Caldercraft Admiralty Matt (metal) Black water based paint.....very authentic looking stuff for this era!


I have been working on my model of HMS Polyphemus recently, so no progress on the Mastiff. Deck planking is the next job, so need some decent time free to make a good job of it.


I may start a thread on my version of Polyphemus, as I am modelling her in her later refit configuration. Rearmed with Nordenfelt 6pdr qf guns and other structural modifications, that is if there is any interest? I don't want to steal Bob K's thunder!
I have made the fore, main decks and flying decks from my own concocted composite, plyluminium. Theoretically a non warping stable material.........I hope!




Ian
Logged

ballastanksian

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,447
  • Model Boat Mayhem inspires me!
  • Location: Crewkerne
Re: Rendal gunboat HMS Mastiff 1871
« Reply #20 on: September 29, 2014, 09:12:51 pm »

Please do Ian. You could say the same about the duplication of the Partwork topics but you learn more, and it isn't really a competitive environment especially as you are building a model of the vessel in a later guise, therefore we will learn more from the two articles.
Logged
Pond weed is your enemy

Footski

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,165
  • Location: Leyland, Lancashire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #21 on: September 30, 2014, 07:09:56 am »

This is a true Modellers model. Simply magnificent.  O0
Logged

timg

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 319
  • Location: east yorks
Re: Rendal gunboat HMS Mastiff 1871
« Reply #22 on: September 30, 2014, 11:08:10 am »

Hi all
I can only agree with everyone else,  1st class work ,  amazing attention to detail
Thanks for sharing Ian

Spud
Logged

Engineman

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 80
  • Full Steam Ahead!
  • Location: State of Moscow, Russian Federation
Re: Rendal gunboat HMS Mastiff 1871
« Reply #23 on: October 01, 2014, 10:52:20 pm »

Hi Ian, hi my dear mate on the hobby  :-)
Let me put a couple of bits on the table...
I do appreciate a lot of your jobs on the deck of the small gunboat... That's really nice...especially your efforts related to the gun...
But what was the reason for you to take this stuff from 'models by design'??? It's a real disaster in terms of historical accuracy to the hull shape of the prototype... The same I can say about the rudder, propellors etc. beyond the deck... These nice pinions on the ventilators - these are really nice, but a bit extensive for such a small boat.
Please, take my criticism as easy as possible, but you know - I'm pretty aware of what I'm talking about...
Cheers,
Roman
 
 
Logged

Ian K

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 103
  • In the workshop, going daft but happy!!
  • Location: Lincolnshire
Re: Rendal gunboat HMS Mastiff 1871
« Reply #24 on: October 02, 2014, 12:30:00 am »

Hi Roman,


Yes, you are quite right about the hull. Although it matches the Armstrong drawings better than any of the other Ant class gunboats, that is why I chose Mastiff as the one to build.



The props are only a temporary fit, commercial 4 bladed jobs, just for testing.
I have already made the correct pattern three bladed ones. As for the rudder blade that has already been corrected, with the more rounded convex curve to the top edge of the rudder. I have found more info since those photo's were taken!


There was quite a variation, to the lines and fitting out to the ant class gunboats, as they were all built by different yards to pre set dimensions.


The as built G/A drawings and profile that I have of Mastiff, show a different cowl vent arrangement to that of her sister boat Bloodhound, Which had lower cowl uptake tubes, and were turned manually by lug handles.


I know you know the subject very well, and I take your criticism as intended :-))




Regards


Ian
Logged
Pages: [1] 2   Go Up
 

Page created in 0.103 seconds with 23 queries.