1/12 Ferrari 312 B3 1974 MG Model Plus

Models in progress... including non-F1 models.
Post Reply
User avatar

Topic author
ferrarissimus
World Champion
World Champion
Posts: 637
Joined: Tue Aug 06, 2013 2:46 pm
Favorite F1 Team or Driver: Ferrari
Status: Offline
Germany

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by ferrarissimus »

Before I go go on working at the motor, I will construct the exhaust system.
The exhausts in the kit are a fantasy product and do not represent the 312 B3 system. The Tamiya 312 T's are different and not usable.That forces to a scratch build system.
I used this technique years before when I build the 312 B2 71and 72.
I didn't find a really soft wire that's easy to bend in narrow radius without leaving kinking or imprints. Electric cable from 3,2 mm diameter represents the the diameter in 1/12, but the copper wire (1,7 mm) is not enough flexible. So I pulled the wire out of the insulation and put a smaller 1,4 mm wire from a thinner cable in. Now it is enough flexible to bend it by my fingers or pliers and it keeps the shape making the silicon form.
above 3,2 mm cable, underneath 2,5 mm cable and the 1,7 mm and 1,4 mm copper wire
above 3,2 mm cable, underneath 2,5 mm cable and the 1,7 mm and 1,4 mm copper wire
bending the cable by pliers
bending the cable by pliers
the motor was fixed on a rack with each 3 holes on each site to fix the rear exhausts.Sorry for the small photos, my camera had a incorrect setting and I had to reduce the files. Was a little bit too much.
2021_01300014.JPG
2021_01300014.JPG (47.81 KiB) Viewed 333 times
2021_01300015.JPG
2021_01300015.JPG (57.86 KiB) Viewed 333 times
2021_01300025.JPG
2021_01300025.JPG (56.15 KiB) Viewed 333 times
2021_01300027.JPG
2021_01300027.JPG (56.88 KiB) Viewed 333 times
Exhausts are now embed in plasticine to make the silicon moulds.
DSCN5433.JPG
User avatar

Topic author
ferrarissimus
World Champion
World Champion
Posts: 637
Joined: Tue Aug 06, 2013 2:46 pm
Favorite F1 Team or Driver: Ferrari
Status: Offline
Germany

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by ferrarissimus »

Here are the new resin cast exhausts:
Silicon halves with resin cast
Silicon halves with resin cast
DSCN5443.JPG
DSCN5446.JPG
You can adjust the resin exhaust a little bit by warming in hot water for the final shape.
User avatar

gp-models
FOTA Chairman
FOTA Chairman
Posts: 3448
Joined: Sun Oct 07, 2012 2:17 pm
Status: Offline

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by gp-models »

Looks like your using a pro casting machine which also can cast white metal depending on the picture from the outer Mold casting ring with it`s pins.
Also the inner casting ring looks like a center casting machine, right?
BTT A fiddly job those exaust pipes! Looking good!
Take a stand!
User avatar

Topic author
ferrarissimus
World Champion
World Champion
Posts: 637
Joined: Tue Aug 06, 2013 2:46 pm
Favorite F1 Team or Driver: Ferrari
Status: Offline
Germany

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by ferrarissimus »

Resin cast exhausts are cleaned and got their final shape by heating and carefully bending. I'm happy with the result so far comparing it with the terrible kit exhausts.
DSCN5454.JPG
DSCN5457.JPG
DSCN5458.JPG
DSCN5459.JPG
User avatar

Joaquin
Midfield
Midfield
Posts: 456
Joined: Mon Jun 02, 2003 3:50 pm
Your Name: Joaquin
Favorite F1 Team or Driver: Chapman's Lotus
Status: Offline
Spain

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by Joaquin »

ferrarissimus, you have a private message

cevert
F2 Champion
F2 Champion
Posts: 140
Joined: Sun Aug 17, 2008 2:24 am
Status: Offline

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by cevert »

Hi. Ferrarissimus. It's a really big job you do. I also intend to cover my models with a thin sheet, what do you think is the most suitable glue? Thank you and I watch with great interest.
cevert
User avatar

steveracer
F2 Champion
F2 Champion
Posts: 177
Joined: Sun Feb 15, 2015 8:55 am
Favorite F1 Team or Driver: Shadow
Location: West Bloomfield, Michigan
Status: Offline
Jamaica

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by steveracer »

Keep going! I love your work. The production of the exhaust looks real consuming and the results are worth it.

I am not fully familiar with the casting process using plasticine (is this plaster?). is this just a base to start from, then make first one silicone on top of it, flip it and make the second silicone mold to "replace" the plasticine?
User avatar

gp-models
FOTA Chairman
FOTA Chairman
Posts: 3448
Joined: Sun Oct 07, 2012 2:17 pm
Status: Offline

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by gp-models »

steveracer wrote: Mon Feb 08, 2021 9:37 am Keep going! I love your work. The production of the exhaust looks real consuming and the results are worth it.

I am not fully familiar with the casting process using plasticine (is this plaster?). is this just a base to start from, then make first one silicone on top of it, flip it and make the second silicone mold to "replace" the plasticine?
That`s how it works. ;)
Take a stand!
User avatar

Topic author
ferrarissimus
World Champion
World Champion
Posts: 637
Joined: Tue Aug 06, 2013 2:46 pm
Favorite F1 Team or Driver: Ferrari
Status: Offline
Germany

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by ferrarissimus »

Cevert wrote:
Hi. Ferrarissimus. It's a really big job you do. I also intend to cover my models with a thin sheet, what do you think is the most suitable glue? Thank you and I watch with great interest.
cevert

I use CA glue for the smaller sheets and 2 components epoxy glue 2minutes from UHU.

Steveracer wrote:
I am not fully familiar with the casting process using plasticine (is this plaster?). is this just a base to start from, then make first one silicone on top of it, flip it and make the second silicone mold to "replace" the plasticine?

You are right another word for plasticine in english is molding clay.

regards ferrarissimus

cevert
F2 Champion
F2 Champion
Posts: 140
Joined: Sun Aug 17, 2008 2:24 am
Status: Offline

Re: 1/12 Ferrari 312 B3 1974 MG Model Plus

Post by cevert »

UHU glue is a great idea. Well thank you
Post Reply
  • Similar Topics
    Replies
    Views
    Last post