Model Boat Mayhem

Please login or register.

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

Author Topic: THAMES STEAM LAUNCH MIRANDA 1/12 scale  (Read 13194 times)

Patternmaker

  • Guest
THAMES STEAM LAUNCH MIRANDA 1/12 scale
« on: August 29, 2008, 10:30:36 pm »
Hello, I am Mike a newcomer to Model Boat Mayhem, a retired patternmaker with a passion for building model boats for the past 60years. I have one displayed in The National Sceince Musuem of a Shearwater Catamaran made in 1957 and a model of a fisheries protection vessel built for Lake Chad in 1962 for the United Nations building in NY.
I mainly built and raced Nitro boats but decided to build a steam launch, Miranda was scratch built from adapted plans by Basil Harley
All the mahogany used was cut from a discarded window frame, the engine and gas fired boiler were made by my son Paul.
Its nice to see so many nice models on this website.



http://i499.photobucket.com/albums/rr360/patternmaker_photos/013.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/019.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/017.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/018.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/014.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/015.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/011.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/009.jpg
http://s499.photobucket.com/albums/rr360/patternmaker_photos/?action=view&current=023.flv
http://i499.photobucket.com/albums/rr360/patternmaker_photos/013-1.jpg
http://i499.photobucket.com/albums/rr360/patternmaker_photos/015-1.jpg
Logged

Bunkerbarge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,514
  • Location: Halifax, UK
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #1 on: August 30, 2008, 01:21:43 am »
Absolutely beautiful launch there Mike, and quite a stunning finish on the hull!

Lovely job and what a great first post to be able to share such a wonderful model with us.  I can't wait to see what else you have made.
Logged
"Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days"

Bernhard

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #2 on: August 30, 2008, 07:08:01 am »
Wooooooow.......GREAT.......

regards Bernhard
Logged

barryfoote

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #3 on: August 30, 2008, 08:33:11 am »
Absolutely beautiful....Welcome to the forum Mike. I am not on my own in looking forward to your input.

Barry
Logged

Patternmaker

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #4 on: August 30, 2008, 09:36:53 am »
http://www.youtube.com/watch?v=wfZ_e8zctdU


Link to utube video of first trial of Miranda Underway in neighbours 15ft diameter swimming pool at tickover, (10psi boiler pressure) full rudder required.
Logged

tonyH

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,347
  • Model Boat Mayhem Forum is the Best!
  • Location: Suffolk, England
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #5 on: August 30, 2008, 08:36:42 pm »
Stunning Mike,

Welcome to THE Forum to you and Paul.

Tony
Logged

kno3

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #6 on: August 30, 2008, 09:56:29 pm »
Very nice boat. What kind of boiler is that?
Logged

Patternmaker

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #7 on: August 31, 2008, 12:14:03 pm »



Hi kno3,   The engine and boiler were made by my son a precision engineer adapted from plans by Basil Harley with modifications to the engine i.e.:
crankshaft, valve chest steam ports,
controller, engine base plate and cylinder plate. The boiler is made from 16g copper sheet with 6 -15mm cross tubes all silver soldered, the boiler support and smoke box are mild steel
coated with heat proof paint. The boiler is gas fired with a 4in ceramic burner and refillable
gas tank situated in the front saloon with a removable roof and rear wall for access to ignite
burner. The boiler has been pressure tested to 100psi, safety valve set at 50psi.
The only parts purchased were; pressure gauge, whistle and globe valve.
I clad the boiler and made all the other brass fittings on the boat with the exception of;
Propeller, navigation lights and bollards.
Mike

Link to Engine and Boiler Test
http//vid4999,photobucket.com/albums/rr360/patternmaker_photos/001.flv">
Logged

kno3

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #8 on: August 31, 2008, 03:01:01 pm »
thanks! Do you have a pic of the inside of the boiler? I'd like to see it it has water tubes or fire tubes and how the flame goes up to the chimney.
Logged

Patternmaker

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #9 on: August 31, 2008, 07:41:58 pm »
Sorry, I do not have a picture of the inside of the boiler, the cross tubes are set at opposite angles 3/8" from the centre line of the boiler, you do not get flames in the smoke box or up the chimney from a ceramic burner/
Mike
Logged

mogogear

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #10 on: September 04, 2008, 11:30:55 pm »
You eye for detail is obvious. A very nice launch.
Logged

bogstandard

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #11 on: September 05, 2008, 02:54:45 am »
kno3,

I have made one of these boiler and engine combinations and they do work very well.

I have done a very basic sketch for you to see how the cross tubes fit into the boiler.

They are the next step up from a pot boiler and very easy to make.

John
Logged

kno3

  • Guest
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #12 on: September 05, 2008, 10:48:21 am »
Thanks John!

So, if I understand correctly, the flames go directly into the fire tubes below the boiler, and not around it?
Interesting design. Does it have any specific advantage over other boielr types?
Logged

SteamboatPhil

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,776
  • Location: Dieppe, France
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #13 on: September 05, 2008, 01:12:40 pm »
Thought you might like to see my one. Based on the Waterlilly, that was at the National Maritime Museum Greenwich. Its 4 ft long single cylinder 5/8 bore and stroke engine with vertical centre boiler. I was just finishing this when Basil's article first appeared in Model Boats, spent the next few years pointing out it wasn't the Miranda (still have to do it occasionally now) As you can see it also has the traditional tean earn in the aft cabin
 :)
Logged
Steamed up all the time

Chris c

  • Shipmate
  • *
  • Offline Offline
  • Posts: 4
  • Model Boat Mayhem is Great!
  • Location: Gosport hampshire
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #14 on: June 20, 2014, 07:21:52 pm »
Hi
I have just been given plans for Miranda steam launch,never built plank on frame before,I have no technical data telling me what sizes of timber for planks etc.or written guides on building her.
Sorry still a novice but determined to build her.
Can u help
Logged

Zigmonde

  • Shipmate
  • *
  • Offline Offline
  • Posts: 1
  • Model Boat Mayhem is Great!
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #15 on: June 02, 2015, 12:56:09 pm »
hello

does anyone on this forum know where I can get the model boats build article for this boat. 

Many Thanks
Logged

tony52

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 219
  • Location: Bury, Lancashire.
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #16 on: June 03, 2015, 09:41:02 pm »
Miranda was featured in the July, August, September & October 1983 editions of Model Boats magazine. Seem to remember reading in a later magazine an item on converting the burner to gas firing, but unfortunately can't locate the year/date.

Couldn't find any currently available at the magazine exchange, but the August & October issues are listed on ebay with a seller in the US.
Logged

Kerrsy

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 174
  • Location: Wiltshire, England
Re: THAMES STEAM LAUNCH MIRANDA 1/12 scale
« Reply #17 on: June 13, 2015, 05:52:51 pm »
Hello Chris
God you gave me a fright, mick (patternmaker) was a good friend to me while I was building my boat but sadly he past away a few years ago.
So when I saw his artical back up the top of the forum I thought it must be a ghost !!!


Any way have a look at my artical  "Building the Alaska" it will give you all the pictures and know how to plank a boat.


There are also some other very good articals and build blogs on this subject in other blogs for other boats.
Have a look at them all, we all have little idiosyncrasies and one of them will help you.


I also have built the Miranda as my first and can supply you with pictures if required.


Regards


Alan
Logged
Pages: [1]   Go Up
« previous next »
 

Page created in 0.092 seconds with 21 queries.