8 Posts
9 Followers
56 Likes
New Moth MKII semi scale yacht
Haven't built anything for a while due to lack of space (too many models) but the urge to build something was too great. After looking at many options, I decided to go with something 'easy' to build. I found some full size plans for an Australian MkI Moth which I'm building to a MKII (double chine) style.
I'm building in foam and glass again to make things easier. It's 850mm long and 310 wide which is roughly 1/4 scale (original is 11 ft)
Started by converting all the lofting measurements on the redrawn 1953 plan to metric and dividing them by 4 to get the scale.
Next was creating the ply deck, then contact gluing onto it a piece of dense 50mm building polystyrene. This was then shaped with a surform file and the chines shaped afterwards using eyeometry. Then the 10mm deck foam was glued on so the deck sheer could be shaped.
Next the cockpit foam was routered out, and basswood sides and inner transom piece epoxied in. After that, the ply outer transom piece and hardwood nose block was epoxied on.
The centerboard case upper and lower ply braces were routered out (using the mill and a 1/2" slotting bit) large enough to accept the case sides, leaving enough room for the 6mm aluminium keel (can't use a centerboard for obvious reasons) which will have to have a bulb fitted.
A rebate in the bottom of the hull was routered out for the lower c/board brace. These braces are needed to form part of a box structure with the floor and cockpit sides which the c/board can lever on. Once everything is eventually glassed in, it will make it very strong unit, so the foam will just be the shape surrounding the box, and not having any strain put on it. The ply deck will take the strain of the stays/mast.
The cockpit floor was cut, and will be slotted the same as the braces, then the c/board case will be built.
The mast on this is 1.486m tall, - sail is -luff -11.295, foot 609mm, so quite large for a small boat. The full sized boat is a lot of fun to sail, so this model will be interesting to sail. Unfortunately, without the human input required, and being a performance boat, it may assume the attributes of a submarine in a stiff breeze, - time and testing will tell.
The basic mast was made from 12mm ally tube, boom from 10mm. Sail pattern was cut from art card to the plan. All laid out on the floor to get an idea of what it will look like.
PDF is the history of the Moth. There were a number of versions round the world as it went along,- scow, international moth (dinghy type) and todays high speed foiling moth.
Lots more to do yet
JB
2025 world champs, off the Whangaparaoa peninsula, just up from where I live.
https://www.youtube.com/watch?v=FuLhJ-yRLmc
https://australianclassicdinghynetwork.org/moth
https://www.youtube.com/watch?v=wWkd2e8apSI
https://www.moth.asn.au/
https://www.youtube.com/watch?v=gAifFN0RJ0M
๐ณ๐ฟ jbkiwi
8 hours ago
3 Posts
4 Followers
9 Likes
Krick Paula | Work / Crane Boat
Kit Build bought from Krick. Formerly a Robbe Kit but now known as Romarin by Krick.
72cm length with a 600 motor ( eventually!)
๐ฌ๐ง Heners2332
1 day ago
2 Posts
2 Followers
14 Likes
LISA M Motor Yacht
I've bought the above kit to keep me busy during these dark dank winter months. Originally I had planned to build a 880mm (34.6") Bluebird of Chelsea plank on frame kit. It is a famous pleasure craft built for Sir Malcolm Campbell and took part in rescuing soldiers from the beaches of Dunkirk under 'Operation Dynamo' in 1940. Unfortunately much to my bitter disappointment only the larger 52" version now is available which is too big for myself.
I'm hoping some kit builder will make a kit of this craft at about 36" so in the meantime here goes with LISA M
The kit has an ABS hull (a bonus for my hands these days!) and laser cut plywood parts. The kit also comes with an electric motor so all you need is a servo and speed control plus the usual R/C gear and battery.
A set of English instructions were also provided which are a reasonable translation with the odd error here and there! I feel they could be a bit more specific in places so study the photos.
The ABS hull comes with about 1 1/4" (about 300mm) extra height above the deck level which needs cutting down to be about 2mm above the temporary fitted deck level. This wasn't that easy but in the end I used a pair of tin snips to cut it which proved to be better than using a Stanley Knife. I have drilled and filed the holes in the ABS hull for the prop shaft tube and rudder tube. I've now assembled the deck coaming, motor mount, battery box and supports for the rudder tube. Next job is to waterproof the deck on both sides, and all the other assembled plywood parts. Having seen another blog, I've decided to strengthen the wood around the rudder tube by using an offcut from the wood provided for the boat stand. I will smooth the edges when the glue has set!
๐ฌ๐ง DuncanP
2 days ago
12 Posts
7 Followers
77 Likes
Midwest/Model Expo Fireboat
Model Expo has confirmed that production will soon begin on a new Midwest kit: the Fireboat, presented at a scale of 1/2" = 1 foot.
To clarify, Model Expo has acquired the licensing rights from Midwest to produce all of their models. At the moment, they have 27 kits in production, with more on the way. I previously worked with Model Expo in customer service, answering model-building questions and handling replacement-part requests. Now, I am one of the model builders who assemble their prototypesโthe models they intend to release to the public.
With that being said, I invite all of you to follow along with this build. I introduced only a limited number of modificationsโmostly to make the vessel more suitable for radio-control operation and to enhance its realismโwhile preserving the essential character of the original design.
Many of you have probably built this classic kit before; however, this is my first time working with it. Please feel free to share your opinions and past experiences with this charming little model.
History of the Fireboats
This model represents a small fireboat equipped with twin monitors, a type of vessel historically stationed in nearly every major working harbor throughout the United States and abroad. Its configuration is based on a combination of plans and photographic references from several representative examples. Because of this, it serves as an accurate portrayal of the smaller fireboatsโmany of which are still in service in various ports today.
๐บ๐ธ chugalone100
3 days ago
2 Posts
5 Followers
12 Likes
Seaway tug boat
This boat was built in the 1990s from an unknown kit I know what it isn't it isn't a mount fleet models tug nor is mobile marine its a model of seaway a tug boat from the clyde its from a deceased friend on checking her out the old radio gear is us as is the speed controller lets hope this isn't a omen to the motor thats geared as I sort out ill post more on her
๐ฌ๐ง Stephen T
4 days ago
4 Posts
6 Followers
23 Likes
Converting a toy semi tractor trailer into a decent RC model Unit
Another RC hobby? I'm already into RC scale model boats (since the early 1970's) and RC armor (since 2015) I am branching out to RC scale vehicles (but not too many). Notice the word scale in each of these three segments of RC hobbies.
This topic is for a RC semi tractor and lowboy trailer being converted from an inexpensive toy. It is already in 1/16 scale and should be compatible with my Springer ("truckable") tugs and Armor (tanks, etc.). I plan to use it at both Model Boat and Armor meets.
This first segment involves the selections I have made and my plan to make the necessary modifications to the toy.
I bought two ERTL about three years ago with the intent to convert them into RC. I paid about $70 (US) for the pair of them on sale. They are currently in the $70-80 range (each). They look good enough to use although not to exact scale. The project goal is to keep the cost down and have a fun functional vehicle.
Why buy two units? When done, I will be using parts from the second vehicle for the first, like wheels for extra axles and other parts.
Right now I am working on the semi-tractor. The new unit will have another axle, this one to lift by RC. It will also have the extra sleeper cabin and other accessories. I am planning to make the "gooseneck" (the part that connects to the trailer) RC controlled. Unfortunately the model's lowboy trailer suffers problems like the real trailers do. Too close to the ground. I will need to elevate the trailer sufficiently so it will not get stuck. I do not have to contend with railroad tracks which makes the vehicles good targets for fast moving trains.
The latest:
This evening I am cementing the chassis frame together. I had to print it in five pieces due to the limitations of my 3D printer. There will be rectangular steel tubing epoxied inside the frame for extra strength.
Lew
๐บ๐ธ LewZ
6 days ago
1 Post
1 Follower
10 Likes
Palfinger PB-950A (kinda)
I saw this little jetboat on Aliexpress and wondered what it might take to get it properly running. After seeing some breakdown videos on jetboats and modifying my Proboat PBR, I decided to give it a try. It's a decent 1s powered brushless jetboat but it lacks a decent control system and reverse. I gutted the control system and added a small 1s brushless esc/receiver unit for a micro plane. The reverse is controlled by a 9g servo, and the bucket is scaled down from a file meant for the Proboat PBR. It's run off a logical switch within Edgetx. When reverse throttle is applied the motor runs forward and the bucket drops automatically. I might change it to a 2s system and it still needs detailing and lights. I'm thinking about repainting it in Canadian Coast Guard markings
๐จ๐ฆ JSS4
9 days ago