GT40s.com
MK-I  MK-II  MK-III  MK-IV  GULF  MIRAGE  J-CAR  LOLA
GT40s.com
Home Forum Gallery Support GT40s.com  
Register FAQ Advertisers Search Today's Posts Mark Forums Read

Go Back   GT40s.com > >

Notices

Lola T70 Lounge Spider and coupe talk, replicas and real.

Reply
 
Thread Tools Display Modes
Old 23rd October 2006, 08:05 AM   #1
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
CANAMSA - SA stratch build

Hi All
Seeing as Ron has started a Lola T70 section, let me be first in. I have been lurking on this site for a while, and have found a lot of extremely useful and interesting info here.
I am a 43 year old mechanical engineer and motor sport enthusiast in Port Elizabeth, South Africa and am building up a self designed space frame two seater mid engine sports car from scratch, that I want to look like a late 60's CANAM style car. I will use it on the road for fun and possibly do some track racing, in our "classic" class out here.
So far I have a prototype chassis complete, all the running gear figured out, and the engine running in the proto chassis.
With regard to body work, I have decided to make my own buck, moulds and bodywork and am inspired by the Lola T70 sypder. To me, this is one of the prettiest cars ever build.
I will try to attach some pictures to illustrate where I am now on the body work.
I had purchased a 1:18 scale model of a Lola T70 Spyder and made up a 3 axis measuring jig in order to measure it, on a 5 mm x 5 mm grid. This data and some reference photo's were then used to draw the body surface in Inventor. That data was then used to produce many flat body sections and some longitudinal stringers on a CNC router from 8 mm plywood sheet. I now have all 67 wooden parts in hand, and can start to put the buck together. The parts were drawn with slots so that they will clip together and self align. The rib I show in the picture is a test piece. The real ones have additional alignment holes. I have also had 350 polyurethane foam blocks cut, to glue into the spaces to form the surface. The foam will be sanded to shape and then covered with a layer of chopped strand mat and resin, to give a solid base. This will then be sanded to fair it, then coated with polyester auto body filler, and sanded again. Then the whole lot will be sprayed with surfacing compound and finally finished to give a suitable surface for moulds. Sounds easy when you say it like that, but I am sure it will take ages.
It seems that people who build car body bucks often end up designing and redesigning the car as they go, which takes up a lot of time. I am hoping that going to all this trouble to produce a good framework with profiles that are exactly what I want will reduce the surfacing pain somewhat.
Originally, I did not plan to attempt to create an exact replica, but now that I am going to all this trouble, it seems a pity not to get it as right as I can.
I will update when I make some more progress.
Regards
Fred W B












Last edited by Fred W B; 23rd October 2006 at 10:43 AM.
Fred W B is offline   Reply With Quote
Old 23rd October 2006, 09:53 AM   #2
REVILO's Avatar
REVILO
CURRENTLY BANNED
United States
 
Join Date: Oct 2006
Location: timbuck2
GT40: Mark I
Posts: 14
Re: CANAMSA - SA stratch build

Your off to a great start! Keep the pictures comming.

?

Last edited by REVILO; 23rd October 2006 at 10:54 AM.
REVILO is offline   Reply With Quote
Old 24th October 2006, 12:00 AM   #3
ckouba's Avatar
ckouba
Bronze Supporter
United States
 
Join Date: Feb 2004
Location: Oregon, USA
GT40: RCR40-31
Posts: 988
Re: CANAMSA - SA stratch build

Fred-

That's a fantastic way to get yourself a body! I really look forward to more updates from your project. Best of luck.

Chris
__________________
Chris K
RCR40 #31
ckouba is offline   Reply With Quote
Old 24th October 2006, 10:42 AM   #4
roclery's Avatar
roclery
3 Tenths
Australia
 
Join Date: Jan 2005
Location: Perth, Western
Posts: 384
Re: CANAMSA - SA stratch build

Hi Fred

I've peeked at your Lola from time to time on one of the UK forums (fora?). Great to see you here, and I look forward to seeing more of your progress.

I intend to build a T70MkIII (not B) coupe once certain other projects are out of the way. I had idly fantasized about digitising my Tamiya 1:12 Lola, so it's great to see it done successfully.
__________________
Regards
Richard
roclery is offline   Reply With Quote
Old 24th October 2006, 12:51 PM   #5
REVILO's Avatar
REVILO
CURRENTLY BANNED
United States
 
Join Date: Oct 2006
Location: timbuck2
GT40: Mark I
Posts: 14
Re: CANAMSA - SA stratch build

I'm not tech. savy with computer scale process. How do you determine the 1/18 size to to full scale without exact calculations of the origianal car?

Revilo
REVILO is offline   Reply With Quote
Old 24th October 2006, 05:29 PM   #6
roclery's Avatar
roclery
3 Tenths
Australia
 
Join Date: Jan 2005
Location: Perth, Western
Posts: 384
Re: CANAMSA - SA stratch build

If the model is 1/18 scale, it is one eighteenth of the size of the original car. Ie any measurement taken from the model will need to be multiplied 18 times and you have the size of the original - in theory. Any errors in the scale model will be multiplied 18 times too. If you have some known dimensions of the original car (ie wheelbase, track etc) you can help remove some dimensional errors from the scale model, but it will be hard to remove errors from the actual shape of the body. That said, scale models made from the blueprints of the original car maker can be pretty accurate.

When the computer draws the 3D image from the digitised model, you can tell it to multiply all dimensions by 18.

Does this answer your question?
__________________
Regards
Richard
roclery is offline   Reply With Quote
Old 24th October 2006, 06:02 PM   #7
REVILO's Avatar
REVILO
CURRENTLY BANNED
United States
 
Join Date: Oct 2006
Location: timbuck2
GT40: Mark I
Posts: 14
Re: CANAMSA - SA stratch build

I understand 1/18 is 18th of the original size in theory. I have seen a rear clip Gt40 Mark II molded with the same process. The Final product looked close but was off the mark IMHO. I also considered your process but went in another direction due to measurment issues. I would hate to see you go through all the work and not satified with the final result.
Good luck and keep us updated. Your build will be very interesting to watch.

Regards

Revilo
REVILO is offline   Reply With Quote
Old 24th October 2006, 06:22 PM   #8
p thompson's Avatar
p thompson
Administrator
United Kingdom
 
Join Date: Aug 2002
Location: Guildford
GT40: None
Posts: 2,753
Re: CANAMSA - SA stratch build

Neat idea Fred - will be great to see it's progress in due course.

Canam cars are way cool!

Also - 'SIR REVILO' - curious choice of member name, could almost be an alias for something else...
__________________
regards
Paul Thompson
-----------------------------------------
Too Many Hobbies
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
- Too Little Time
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
p thompson is offline   Reply With Quote
Old 25th October 2006, 02:09 AM   #9
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
Re: CANAMSA - SA stratch build

Hiy guys, thanks for warm welcome and positive responses.

Regarding the possible errors in scaling up, you do have to hope that the master pattern maker for the model got it right.

That said, we do have the benefit of technology. We actually approached this from two directions. The guy who did the Inventor work for me (I learnt to draw when we still used pencils, ink and razor blades) first tried to develop the body by overlaying computer generated splines and curves on a 3D model devleoped from scanned in 2D plan and side views. You quickly see that the body curves and blends follow natural lines. When this exercize was partially complete we measured the model, and than added in the plotted points. We were pleased to see that they fell almost exactly onto the developed predicted lines. So we combined these techniques to get it looking right. By now we had looked at hundreds or photo's of original T70's and even those seem to vary from car to car.

They also say that if it looks right, it is right, so I am hoping that it will work out well. I am not going to pretend that the panels I make will fit a real T70, but that is not the intention. When I started my project I did not have a particular body in mind, I just wanted to build a car. But you see some home built unique body cars that just don't look great, and I didn't want to do all this work (building a car) and not have it look good. So I decided to follow a car that is accepted as looking good to everyone.

So we will see what happens once the buck starts to come together. I have been help up by some domestic projects but these will be finished soon. I can't wait to get into clipping the parts together!

Cheers

Fred W B

Last edited by Fred W B; 25th October 2006 at 02:14 AM.
Fred W B is offline   Reply With Quote
Old 25th October 2006, 02:22 AM   #10
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
Re: CANAMSA - SA stratch build

This is what the (very rough) mock up chassis looks like at the moment. Rover engine, Audi AAZ 016 trans. I designed and made the exhausts, adaptor/mounting plate and flywheel, amongst other bits. The riveted on 1.6 mm ally side boxes more than doubled the chassis torsional rigidity.
I tested and was very pleased to record the following:
Torsional rigidity without side boxes = 2700 ftlb/Deg
Torsional rigidity with side boxes = 5700 ftlb/Deg
The chassis mass is 96 kg.


Reagrds

Fred W B



Fred W B is offline   Reply With Quote
Old 25th October 2006, 04:07 AM   #11
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
Re: CANAMSA - SA stratch build

Fred W B is offline   Reply With Quote
Old 25th October 2006, 04:08 AM   #12
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
Re: CANAMSA - SA stratch build

Fred W B is offline   Reply With Quote
Old 25th October 2006, 04:11 AM   #13
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
Re: CANAMSA - SA stratch build

Fred W B is offline   Reply With Quote
Old 25th October 2006, 04:12 AM   #14
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
Re: CANAMSA - SA stratch build

and this is me. The cheesy grin is because I had just started the motor for the first time.

Cheers

Fred W B
Fred W B is offline   Reply With Quote
Old 25th October 2006, 07:46 PM   #15
godfather's Avatar
godfather
Australia
 
Join Date: Oct 2006
Location: melbourne australia
Posts: 6
Re: CANAMSA - SA stratch build

good one mate have you still got the patterns for the mould because i cannot draw if so please let me know
godfather is offline   Reply With Quote
Old 2nd November 2006, 11:43 PM   #16
Mark Worthington's Avatar
Mark Worthington
10 tenths
United States
 
Join Date: Dec 2001
Location: Massachusetts
GT40: RF No. 36
Posts: 1,930
Re: CANAMSA - SA stratch build

That's a really cool project, and I'm impressed.

How accurate are the scale models? Are they really derived from original blueprints? Maybe our friend Paolo can answer this question.

BTW - welcome to the forum.
__________________
Regards,
Mark

RF Chassis No. 36 still under construction
347, MoTeC EFI, pin drives, leather, etc.
Mark Worthington is offline   Reply With Quote
Old 3rd November 2006, 08:17 AM   #17
Mark IV
I Have No Life
United States
 
Join Date: Sep 2001
Location: W. New York
GT40: Superformance
Posts: 3,496
Exclamation Re: CANAMSA - SA stratch build

Mark,
Most all scale models are accurate to dimensions BUT have some "poetic license" taken with shapes. If you scale a models body line perfectly, it will not "look" like the prototype. Most have some changes and curves modified to give the "look".

Example: most models have less ground clearance than the 1:1 subject as they tend to look like "4X4s" when set at correct ride height in scale.

Still a good place to start.
Rick
__________________
The GT 40 reunion at the Glen in 1989 was as close to Heaven as I'll get...
Mark IV is offline   Reply With Quote
Old 8th February 2007, 07:36 AM   #18
roclery's Avatar
roclery
3 Tenths
Australia
 
Join Date: Jan 2005
Location: Perth, Western
Posts: 384
Re: CANAMSA - SA stratch build

How's your project going, Fred? It'd be great to see your progress.
__________________
Regards
Richard
roclery is offline   Reply With Quote
Old 8th February 2007, 11:00 AM   #19
Fred W B's Avatar
Fred W B
6 Tenths
South Africa
 
Join Date: Jul 2006
Location: Port Elizabeth
Posts: 676
Re: CANAMSA - SA stratch build

HI Richard

Well, it turned out to be early January 2007 before I got started on putting the framework of the body plug together. I reorganized the workshop in order to do that.

With any luck I should have some better progress photos after the weekend. The latest ones are not downloaded yet.

BTW Ron, if you are reading, love the upgrade.

Cheers

Fred W B





Last edited by Fred W B; 8th February 2007 at 11:13 AM.
Fred W B is offline   Reply With Quote
Old 9th February 2007, 12:02 AM   #20
Phil's Avatar
Phil
9 Tenths
United States
 
Join Date: Feb 2004
Location: New Jersey
GT40: Mk1B
Posts: 983
Re: CANAMSA - SA stratch build

Fred
Great looking work...I am wondering how you are swapping the motor/gearbox in and out...or do I see a removable section behind the rollbar? Great use of triangulation everywhere, and a nice landscaping job to boot!
Cheers
Phil
Phil is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Car building is a complex business Andre40 All GT40 27 2nd January 2008 08:50 AM
New build added to build site Mick GT40 Build Logs 0 13th May 2006 10:21 PM
Help for those RF40 owners at the build stage Chris Liokos GT40 Tech - Exterior, Interior, AC, & Trim 56 12th April 2006 07:06 AM
MDA GT40 MKI Build Packages & Pricing ChrisMartino Vendor and Manufacturer Announcements 1 19th February 2005 11:13 PM
Build update DENIS All GT40 1 25th May 2004 10:56 AM


All times are GMT -4. The time now is 03:54 PM.