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Post by grandsport3 on Feb 7, 2021 6:22:37 GMT -8
Great Nassau shots, Thanx. You can see two different bolt up wheels: slotted and solid. I'm wondering if Chevy designed and provided them? Similar to Hall's Spiderwebs. They look the same as CERV and GS II. And, wondering why Jim didn't run the CERV sidedraught injectors?
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Post by 65slotcar on Feb 7, 2021 9:17:50 GMT -8
JC, great pictures. still not sure about rear wheel and does it have the 4 oval rings, but a perfect picture of the front. you can really see the detail. so what started as a Cox slot car re-pop is getting close to the Gold Star Chaparral body. now with the front of the LS 2C with fins cut off and headlight openings filled in for smaller head lights. will be using chassis from mini exotics kit for a better interior and an engine.
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darylh
Full Time Ride
Posts: 126
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Post by darylh on Feb 7, 2021 9:26:41 GMT -8
Penske looks intense in the 6 car. He 's always been a strong competitor. Those pics of the disc wheels are clearest I've seen and will be a big help to scratch build.
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Post by grandsport3 on Feb 7, 2021 10:29:29 GMT -8
Great photos! Question on the Chap 68 photo: Where location? Looks like Road America, never seen a #68 run. Also looks like double trailing arms running thru metal edged openings, most edges on the Chap chassis had metal edges.
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Post by afx on Feb 7, 2021 12:39:24 GMT -8
Jim Hall, 1964 Road America
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Post by afx on Feb 7, 2021 12:41:21 GMT -8
1963 GM Corvette GS II concept car
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Post by arcticwolf on Feb 7, 2021 13:57:50 GMT -8
Great photos! Question on the Chap 68 photo: Where location? Looks like Road America, never seen a #68 run. Also looks like double trailing arms running thru metal edged openings, most edges on the Chap chassis had metal edges. Does this help (Mosport):
Mosport '64:
Note the exhausts and the spoiler cutouts for this race.
Paul
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tiptoe
Qualifier
Race/wreck/repair/repeat
Posts: 51
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Post by tiptoe on Feb 7, 2021 15:16:43 GMT -8
Also a HUGE Chaparral fan! My eyes are glued to this thread and I'll have to share my own down the line!
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darylh
Full Time Ride
Posts: 126
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Post by darylh on Feb 7, 2021 18:25:23 GMT -8
More great pictures posted. The cars were painted Chevrolet Ermine White at the race shop. I bought some from MCW I just need to get my hands on a 2A kit. Transparent stacks on that Corvette GS II a pretty cool.
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Post by Joel_W on Feb 8, 2021 6:29:38 GMT -8
Just an outstanding thread both in build and discussion. Will be following along in the background for sure.
joel
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Post by Chris K. Hale on Feb 8, 2021 7:03:59 GMT -8
Yesterday someone hit a major transmission source for phones, wi-fi, internet and a ton of related stuff and severed all communications in Mohave county Arizona, so no anything for about 24 hours. Today everything works! Yeaaaaaay! In my research on the 2A in late 64 and early 65 for a race in Europe, seems Hall was testing the waters, but here is the deal.. the car was called "The Wobbly Wheel Car !" so here are few pics. I havent been able to research it more but the wheels are different , note the #967 on the 2a , that was Europe. And a race or 2 here, Here are the pics.. another interesting item I noticed was 3 different exhaust set ups and possibly 2 different engines, looks like the bottom is a small block and the others big block? I am going to find my photos of the GS-II (Grandsport) Corvette CERV car that was in presumption the fore runner to the Chaparral 2a as seen above ( Silver Blue #2 car) .. Glad we are discussing the 2a due to its historic value.. Chris Ps. I wonder what manufacturer made the "Wobbly Wheels" ?
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Post by starfighterace on Feb 8, 2021 8:05:59 GMT -8
Just a few notes to share....
Ermine is the shade of white used on the Chaparrals. It was their "Fleet" white, like Wimbilton White was for Ford. It was used from the 50's into the early '90. Side note, Group 44 used the same color with their Brit cars (MG, Triumph, and Jags) Source: from the guy who bought the paint, who was a regular customer and I built their 1/43 kits for years for team members.
Wobbly wheels are from an old AMT Falcon kit. Some guys cast them for friends. I was fortunate to been given a set.
The GS-II is a Chaparral 2B. Ever wonder why it went from 2, 2A, 2C, 2D, etc...? Now you know
The brown fiberglass looks a bit translucent. Use a medium to dark brown with a clear orange over it. It looks amazingly realistic
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Post by afx on Feb 8, 2021 9:20:05 GMT -8
en.wikipedia.org/wiki/Wobbly-web_wheelLotus racing carsThe best-known example of the wobbly-web wheel was that used by Lotus for their racing cars of the late 1950s and early 1960s. These wheels first appeared on the Formula 2 Lotus Twelve of 1957. A similar wheel was used by Vanwall from 1958. The wheel's design was, in typical Lotus fashion, intended to achieve the lightest possible weight. This is particularly important for wheels, as they are unsprung weight and the cars intended to carry them were extremely lightweight. Their designer was Lotus's Gilbert 'Mac' McIntosh, although again, in a typically Lotus fashion, they were often credited to Colin Chapman. Unlike earlier 'waved' wheels, the Lotus design and its distinctive 'wobbles' was a deliberate feature, even down to the way that the wobbles are deeply indented near the hub and soften outwards to the rim. For ease of manufacture by casting, the wheels were designed with a constant wall thickness. Their stiffness (force/area) was required to be highest around the hub, so here the wheels were deeply and steeply folded. Towards the rim, distribution of this same force over a greater circumference and metal cross-section thus required less folding and their profile became a gentle wave. As for many other Lotus components, the wheels were cast from Elektron magnesium-aluminium alloy. They were cast by Stone Foundries of Charlton. Cooper were already using magnesium wheels and apart from their technical advantages, Charles Cooper had found it highly profitable to sell drivers the many spare wheels required for racing, rather than having an external supplier take the business, something that Chapman was keen to emulate. McIntosh and Chapman also obtained foundry scrap, failed wheels from Coopers, and studied these failures to understand the failure modes of a magnesium racing wheel. Lotus team's racing colours at this time were green and yellow, often small patches of each with the bodywork substantially of bare polished aluminum sheet. With the advent of the wobbly web wheel, rather than the previous wire wheels, the wheels were painted yellow and the car bodies green. This glossy bright yellow colour could be applied easily over the greenish-yellow zinc chromate primer used on the wheels to prevent corrosion. 4 stud wheel controversy at Le MansLotus's main design principle at this time was Chapman's famous maxim, 'Simplicate and add more lightness'. The Formula Junior Lotus 20 and Lotus 22 extended this to their front wheels, which used a 4-stud fastening, compared to the previous 6-stud that was still used on their rear, driven, wheels. At the 1963 Le Mans, Lotus entered the new, and somewhat unfinished, Lotus 23, a widened version of the Lotus 22 two-seater. It was disqualified from competition before the race and did not take part. This was on the basis of its wheels, although not specifically due to the wobbly-web design. The car, as designed, used Lotus's typical 6-stud wheel at the rear but a 4-stud mounting at the front. The wheel rims were also wider at the rear, 6" vs. 5", with wider tyres of 5.50×13 rather than 4.50×13. As the rules for Le Man were still framed as a "sports car" endurance race, they required the carrying of a spare wheel. The 23 had such a spare, but obviously it could not be fitted to both ends of the car. The scrutineers rejected this and barred the car from competition. Matching 4-stud rear hubs were flown hurriedly from England, avoiding the incompatibility problem, but the scrutineers now objected that if 6 studs had been required before, 4 must be inadequately strong and still refused to allow the cars to compete. After this, Chapman replied "We shall never again race at Le Mans.", a promise that Lotus kept until 1997, long after Chapman's death in 1982. The following year's Can Am sports car, the Lotus 30, switched from wheel studs to centre-lock wheels. This was mostly due to the far greater torque of its large V8 engine, but it also avoided this situation re-occurring, as the 30 also carried a single spare wheel. Spoked wheelsA drawback to the use of a disc wheel, particularly for front wheels, is the lack of airflow through the wheels, which is important for cooling the brake discs. The rear wheels of single-seat racing cars are driven by driveshafts from the transaxle and the brakes are usually mounted inboard in any case, away from the wheels. Later Lotus designs, from the 26 onwards, used spoked wheels, although this was more about the shrinking diameter of racing tyres, especially fronts, rather than brake cooling. With an open-wheel racing car, any shrouding from the wheels was never a serious limitation. Alloy problems
As for many articles made from Elektron alloy, corrosion of the magnesium was a problem for long-term service. Even though Lotus only used these wheels on its racing cars, not its road cars, they had a limited service lifetime. Lotus cars of the 1960s are still popular for historic racing, but these wheels are now no longer acceptable for competition scrutineering, no matter what their apparent condition. As the wheels are such a distinctive part of the car's appearance though, there are modern reproductions available.
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Post by grandsport3 on Feb 8, 2021 11:01:46 GMT -8
WOW, Lots of good info. It seems the early 2As ran ROUND headlights (smaller covers) thru 1964 and Jim's had the rectangular lights with wider covers, his also had a chrome rollbar and blue dash and door inner covers, Hap's had Black but there was a Blue rollbar also (Penske's?). BUT: Jim and Hap Sharp did switch cars and renumbered so you can't take either for either (If that makes sense). I did like the Mosport body off photo, looks like the aircraft battery Jim liked to use (lighter) but it did bite him at 1966 LeMans when the 2D did not finish due to a dead battery and our French friends(?) did not allow a recharge or replacement battery. Jim was like Colin Chapman "The Lighter the Better!" So, It seems there THREE 2A chassis? I was fortunate enough to visit Midland twice and Jim let me photograph anything I wanted, Troy Rogers (GREAT Guy) showed me around, the 2E was in full restoration as was the 2F. I have lots of photos I need to download to Photobucket including Famous "Automatic" by itself on a transmission stand and the 2Es alloy engine on an engine stand. I will look for them now and post soon,This is FUN.
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Post by Joel_W on Feb 8, 2021 11:33:21 GMT -8
All this historical information just proves what a wealth of information the members have and are willing to share.
And JC, thanks for the Lotus wheel history as I knew very little of it.
Joel
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