SlotForum banner
1 - 19 of 19 Posts

·
Registered
Joined
·
2,070 Posts
Discussion Starter · #1 ·


Well yes... it is an upside down rice pot
but on top of that is my "rough cut" balsa master for a Lotus 15 that I've been building.

After a little more work I decided to cast it in plaster on the theory that damp plaster would be easier to work with - that seems to have been a good idea...

Here is the female mold next to the balsa master...



and here is the plaster copy after a bit more sanding and scribing...



Not being a master model builder or anything close this project has been a steep learning curve but, I'm having fun, and if it works out I hope to have a nice'ish if not top notch model at the end of it all.

There are a few more details on my web site for anyone interested and there is also a nice SlotForum graphic kindly given to me by Swissracer
in the links section to return you here once you have had a look
 

·
Registered
Joined
·
168 Posts
That is looking really nice John! Carving bodies may not be for everyone, but the satisfaction you get from completing a car you have literally built yourself is really special -- esp. when it is a model of a unique car not offered by a manufacturer. Be sure to let s see it when you are done.

P.S. I've been toying with the idea of trying to carve the BRM turbine car raced by Graham Hill at LeMans in the early 1960s (the #00 roadster), but so far haven't managed to build up enough motivation or time to take it on. I haven't seen any plans or detailed fotos but looks similar to the Lotus 15.

mp
 

·
Registered
Joined
·
4,593 Posts
The Lotus body looks beautiful- one of my favourite cars, too. But one thing still puzzles me about resin casting... How are you going to make that lovely wrap-around curvy windscreen? Can you cast in clear resin? Or do you have to have vacforming facilities? I love whittling away to make body shells, but the clear parts still fox me. What do you do?
 

·
Registered
Joined
·
2,070 Posts
Discussion Starter · #10 ·
Hi howmet tx


Well like I said I'm no expert. But I do have a cunning plan:

1. make another female mold this time from the "final" master.
2. cast the shell in resin using the slushy method.
3. do a normal re-cast in plaster.

In theory the resin part will be drilled for the lights and detailed while the plaster copy will be converted to a vacuum mold, i.e. windscreen added using DAS air drying clay and the body undercurves straightened out. I do have a simple home made vac former and I should then be able to form a shell in clear plastic to cut up for the windshields and lights. Bingo!

Just need the wheels then, so...


Al, the 11 and 15 are very similar although when you start to look at these cars you realise that there are many individual variations. In general terms, visually the 15 has a lower frontal area (the engine was canted over for a lower c of g) and it has a curvier windscreen particularly at the trailing edge.
 

·
Registered
Joined
·
4,593 Posts
'Simple home-made vac former'???

You interest me strangely. Care to impart any details?
I'm fed up to the back teeth with trawling through old packaging materials to find bits of clear plastic with appropriate curves. Not to mention the scowls I get from the wife when I'm raiding the rubbish bins. 'Easter egg boxes!!! Don't throw those things away!' 'But it's November, love, you can't need them anymore!''Not if I can find out how to make...... A SIMPLE HOME-MADE VAC FORMER!'
 

·
Registered
Joined
·
2,070 Posts
Hi John

I'm not really worried about how fast it goes (at least not yet anyway!) so probably a small Pink-Kar/Ninco Go-Kart type motor in a simple brass surround frame.

I'm not sure about the wheels. I've got a small lathe so I might try and turn some, otherwise I thought I might try some old Airfix/MRRC Lotus 24 types.

Any suggestions welcome...
 

·
Registered
Joined
·
4,593 Posts
With the greatest respect....

I got some nice 'wobbly web' inserts from Pattos. They're vacformed, and a bit tricky to turn down evenly (unless any one has any tricks for this), but they look OK on my Lotus 19. I also saw some very good Lotus wheels on the BWA site.
By the way, you can get some incredibly hot HO motors, like the diddy Pink Kar ones but plenty fast, from the US.

Strangely strange but oddly normal.
 
1 - 19 of 19 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top