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Another Super 7

True Scratch-building Brass & Aluminum Machining Casting

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#241 Scale-Master

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Posted 08 March 2013 - 06:01 AM

And by the way, what's the correct color for the Prisoner car?

 

I think is just BRG overall.  I thought the nose was yellow, (I would use Testors Dark Yellow). But a good friend of mine seems confident the nose is bright orange.  Could be the difference in T.V. and computer monitors...?



#242 GeeBee

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Posted 08 March 2013 - 06:18 AM

 

I believe the Prisoner car has Lotus Elan wheels, correct? (I think you may have told me that yourself, Mark). I've wanted to do a Prisoner Lotus forever - I've got the Tamiya 1/24 kit and recently picked up a Gunze Elan for the wheels. I'm going to end up casting at least one wheel (for the spare) - or maybe five if I don't want to end up with a wheel-less Elan kit.

 

And by the way, what's the correct color for the Prisoner car?

 

The original Prisoner car was black with a yellow nose, the wheels are correct out of the Gunze Elan, but use the hubcaps from the Tamiya version, 



#243 sjordan2

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Posted 08 March 2013 - 06:19 AM

The color scheme is typical Lotus -- yellow nose, dark green overall (tends to look black), with a red interior, which you can see in post #232.

 

Some more pictures and background:

 

http://www.theunmutu...o.uk/lotus7.htm

 

According to one source, "The real KAR 120C had been Cosworth 1500 powered." Is that the engine in the Tamiya kit? If not, where would you find one?

 

EDIT:

I answered my own question. "The Lotus Super Seven, modelled here by Tamiya was powered by a Ford Cosworth 4 cylinder 1.3 liter engine using two dual throated Weber carburetors, which produced 83 BHP at 6000 RPM."

 

Nice build journal describing the Tamiya kit:

http://www.modelersi.../Lotus7_eng.htm

 

Sorry to hijack. Now, back to this scratch-built masterpiece.


Edited by sjordan2, 08 March 2013 - 06:52 AM.


#244 Scale-Master

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Posted 08 March 2013 - 06:31 AM

Well, there you go Skip.  You can use the Tamiya 1/12 Caterham to build a copy of the limited edition Prisoner car.  It would pretty much just be a paint job and some license plates.

 

But to me it does not capture the svelte or vintage look of the T.V show car.

 

The 1/24th kit has the 1300 engine.  I am not familiar enough with those particular engines to know if it looks the same as the 1500, (like a smalll block Chevy can be a 302, 327, 350... in scale without changing the parts).


Edited by Scale-Master, 08 March 2013 - 06:34 AM.


#245 Ace-Garageguy

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Posted 08 March 2013 - 06:52 AM

I had an S2 with a 1340 Cosworth (Ford 109E) pushrod engine, which is not a crossflow. From the pix I've seen, the 1500 Cos is plenty close enough to pass.



#246 sjordan2

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Posted 08 March 2013 - 06:56 AM

Here's the Tamiya engine.

 

lotus_03_zpsd044e93b.jpg



#247 Ace-Garageguy

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Posted 08 March 2013 - 07:07 AM

Cosworth 1500 pushrod

 

cosworth_1500_engine_from_left_front.jpg



#248 Scale-Master

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Posted 08 March 2013 - 07:07 AM

Anyone have a shot of the 1500 engine handy that they can post ?  It would be nice to do a "head to head" comparison.



#249 GeeBee

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Posted 08 March 2013 - 07:11 AM

Well, there you go Skip.  You can use the Tamiya 1/12 Caterham to build a copy of the limited edition Prisoner car.  It would pretty much just be a paint job and some license plates.

 

But to me it does not capture the svelte or vintage look of the T.V show car.

 

The 1/24th kit has the 1300 engine.  I am not familiar enough with those particular engines to know if it looks the same as the 1500, (like a smalll block Chevy can be a 302, 327, 350... in scale without changing the parts).

 The 1500 had a slightly taller block, but in 1/24th scale your not going to notice the difference, the Cosworth 1340 was a short sroke version of the Ford 997 c.c engine



#250 Scale-Master

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Posted 08 March 2013 - 07:56 AM

Steve, looks to me the needed parts to make an accurate (to the eye) Prisoner car in 1/24 are all there.  You'll still have to make license plates.  Thanks for playing along guys!



#251 Deano

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Posted 10 March 2013 - 02:21 AM

Mark, I'm going into withdrawal here!  Need ... update ... now.  Your Sevens are astounding!



#252 Scale-Master

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Posted 11 March 2013 - 05:34 AM

Thanks Dean!

 

Here’s the set of five tires and outer rims I have made for it.  I’m ready to get back to part and pattern making.  Prototype work is more rewarding than “production” work.

DSC01938_zps13bdedfc.jpg



#253 Mooneyzs

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Posted 11 March 2013 - 06:19 AM

Those tires and outer rings look great. Nice work

#254 Scale-Master

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Posted 15 March 2013 - 10:39 AM

Thanks Chris, time to move on to another medium...

Time to start building the frame.  I am going to make it slightly beefier than a standard Caterham or Lotus, I went with 1.5 inch square (scale size) tube for the main sections.

In this picture are the top section from the nose to about the cowl, the lower perimeter box for the passenger compartment, and two lower front frame rails, (partially bent).

DSC01946_zps214a2f41.jpg



#255 NormL

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Posted 15 March 2013 - 01:25 PM

Your work is awesome, I am curious where you get the dimensions from?  Being a Land Surveyor and a 3D guy I can't help but wonder.



#256 Pete J.

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Posted 15 March 2013 - 06:53 PM

Thanks Chris, time to move on to another medium...

Time to start building the frame.  I am going to make it slightly beefier than a standard Caterham or Lotus, I went with 1.5 inch square (scale size) tube for the main sections.

In this picture are the top section from the nose to about the cowl, the lower perimeter box for the passenger compartment, and two lower front frame rails, (partially bent).

Mark- From the lack of discoloration I suspect you are using an American Beauty.  Just one bit from my experience.  If you used simple butt or mitered joints, a gusset would add a lot to the strength of the frame.  With resistance soldering they are very easy to add without destroying the joint.  Just keep the tweezers on the gusset.

 

The pieces look nice and symmetric.  In my world that is always the toughest part.


Edited by Pete J., 16 March 2013 - 10:07 AM.


#257 Scale-Master

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Posted 18 March 2013 - 06:49 AM

Everything is pinned together, with brass rod inside the square tubing, no butt joints.  For every piece you see, there is another you can’t.  I’m using the American Beauty to assemble it, and a torch to finish the joints before filing them. 

The symmetry is fun, especially since the frame has multiple angles.  Lots of measuring, checking, checking, checking, measuring... And I build both sides at the same time.

 

I have reference books to get the dimensions from.  Also, I have built several of the Tamiya kits and played with a real Caterham, so I’m a little familiar with the subject matter.

 

Main lower frame perimeter is soldered together…

DSC01947_zpsbfa76f54.jpg

Some bracing added…  Still need to clean up the solder joints on them, after I add more pieces…

DSC01968_zpsc8d42e67.jpg



#258 Scale-Master

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Posted 18 March 2013 - 01:26 PM

More pieces added…

DSC01969_zps37dec8fe.jpg



#259 martinfan5

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Posted 18 March 2013 - 01:32 PM

The frame is coming a long nice ,  I may have over looked this if you did mention it, where did the tires come from?



#260 Scale-Master

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Posted 18 March 2013 - 01:41 PM

Thanks!

I made the tires from scratch, like all the other parts on this one.


Edited by Scale-Master, 18 March 2013 - 01:41 PM.