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Post by Jawfish on Mar 15, 2005 15:37:20 GMT -5
Well I should have posted this before... I've started my frame this weekend for my mini powered Terrapin. Going for a retro build, front radiator, curved aluminium side panels, diaphram bulkheads. Here some details shoot of the bulkhead's being built. It's a work in progress so I'll upload new pictures and comments as things move on. ( probably pointing my mistakes or frustrations  ) I have a new web provider for my site so pictures are not a problem. Bulkhead#4 www.jawfishracing.com/bk4.htmlBulkhead#2 www.jawfishracing.com/bk2.html |
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Post by exst165 on Jun 26, 2005 22:04:01 GMT -5
Fred,
nice website, the pictures of the A-Mods at the US Nationals are great! Off topic but is the yellow one Joe Cheng's Phantom?
I'm in Ontario, Toronto area so I'm interested in some of the Canadian specific details of your build, like if a Terrapin will pass CASC General Competition Rules? I'm new to the sport but my read of the roll bar and roll cage sections (which are written for production cars not open wheel race cars, but are a start) specifically say only MIG or TIG welds 'of the highest quality' are permitted, so I don't know if a braised frame would be allowed. I'm making the assumption that these rules are like taxes - they don't have to make sense, you just have to follow them! Anyway, I would hate to spend tons of time building a car that wouldn't get through tech.
Are you planning to run your Terrapin in solo I events and lapping days?
Thanks in advance,
Thomas
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Post by Jawfish on Jun 27, 2005 21:48:59 GMT -5
Hi Thomas
Thanks for the kind words...
Yup the Yellow one is Joe Cheng Phantom, now owned by Dan Wasdahl....
As for a Terrapin built exactly to the plans passing CASC General Competition Rules I'm not sure, since they don't cover open wheel, but I have some serious doubts.
The ASN is supposed to come up with a National Solosprint rules set, but until then it's a question of who your running with, here in Montreal not much open wheel are being runned. When they are, tech consist of making sure everything is there and safe, not much time is spent checking the rollbar or Frame, things are about to get more serious with the ASN issuing National Rules soon. But I know some lapping clubs will not even permit open wheels.
As the Canadian nationals rules are still far away ( most likely 6 months), I'm basing myself on the SCCA Formula Rollcage specs. I would refer you to the SCCA rules i.e. CGR section 18... And Yes brazing is allowed, heck some formula ford are still built this way today.
I'm currently reviewing the rules as well as my build since I do want to have the opportunity to run some solo 1 events without trouble... That means I will have a main hoop as well as the front hoop. i.e. no curved diaphragm bulhead... but I'm still keeping the back one...
But I'm debating between 1.375 *0.095 or 1.5*120 (the accepted size for cars under 2000LBS by the ASN)for both hoops, and all the bracing with 1.0*0.080... But I have not fully decided yet. Since I still have a few things to sort out and trying to get some feedback from the rulemakers here in Canada.
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Post by exst165 on Jun 27, 2005 22:50:06 GMT -5
Fred,
thanks for your reply. While it is my dream to one day build a 'real' race car, right now my driving skills are almost as non-existent as my fabrication skills. So my two biggest concerns with building a Terrapin revolve around not having anywhere to enjoy it for whatever reason(the local Solo II club does not allow any cars that were not at one time street registered effectively banning open wheel race cars) and not having the skills necessary to enjoy it.
That said the Solo I school & event that I attended a few years back had the briefest of tech inspections and I saw no tech inspection of any kind in the two Solo II events and one lapping day that I've attended. However showing up with an open-wheel race car might attract a bit more attention.
I would greatly appreciate it if you could post any updates here or on your build diary describing necessary modifications to meet ASN/CASC/SCCA specifications.
Thomas
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Post by Jawfish on Nov 6, 2005 10:10:05 GMT -5
Well I'm back at it.
After waiting to see what the Canadian National Solosprint rules would be like, seems to me that It's still confusing and the safe bet will be SCCA norms for single seaters as they were used at the 2005 National Championship. I know that in Quebec this is what we are going to be using for 2006, I'm translating the rules to French as we speak for 2006. This calls for a Main hoop of at least 2 inches above the drivers head and a Front hoop which is at least above the steering wheel. An imaginary line between the top of both hoops must clear the Driver's helmet. Both hoops must be made of 1.375 by 0.095 tubes. Well I'm sure the Terrapin will not weight more than 1500lbs and that is the Standard for all Formula cars below that weight limit.
Also two forward brace of 1 inch diameter of 0.080 thicknesses must be for the main hoop. I will connect them to the Front hoop. The brace must not be below 6 inches from the top of the main hoop.
Another two forward brace are required from the front hoop, near its top. The tubes are again 1 inch by 0.080. from the SCCA roll cage rules "it is recommended that the bracing extends to the bulkhead in front of the drivers feet, but it must be incorporated into the chassis to provide substantial support to the front hoop"
So the plan is to replace Bulkhead #3 with the main hoop. Replace Bulkhead #2 with the Front hoop. Weld the forward bracing for the main hoop to the top of the front hoop. Then replace the diagonal tube from Bulkhead #2 to bulkhead # 1 with the forward brace for the front hoop. I'm still going to used the curved aluminum side panels so I'll weld some curved tubing to the hoops to achieve this. Now it's time to measure a few things and make some basic drawings of the modifications.
Fred
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Post by MiNiTiCi on Nov 6, 2005 11:23:17 GMT -5
Nice to have you back Fred! Rules, rules and yet more rules...AAARRRRGGG!  Luckily, as my Hawke was built in 1976, the latest UK specifications have not been required. However when I build the Terrapin Mk5 I will have to comply with the MSA "Blue Book" regs for roll hoop dimensions and materials. Like you I will have to design in these features for best structural effect. No point in just adding ornament! A few years ago regs were introduced to make sure that the roll hoops were high enough to protect the driver's head - overnight cars were sprouting extensions to their roll hoops - all looked ridiculous and some looked downright dangerous. Doug. |
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Post by Jawfish on Nov 13, 2005 8:10:28 GMT -5
You're right about adding them as ornaments, but I have to admit that I'm not too upset about the requirements. I do have to go back to work, on monday's  Well I'm not complaining too much about our rules. The safety stuff is somewhat constricting, but I guess required. But on the technical side our A-mod Rulles are pretty liberal. Measurments have been taken, and I have started drawing my frame up. Just need to order the steel for my hoop's. It snowed here this week, so it's time to hibernate in the Garage ;D |
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Post by Jawfish on Sept 24, 2007 21:30:24 GMT -5
Hi Guys, Wow 2 years since I posteed in this tread... pffew how time flies... Well the my Locost race car is getting there so that means I'll be getting back to the Terrapin soon. Last week I built a piece for locost and I decided to take some pics to show how the holes are formed on the bulkheads First: You drill the holes with a holesaw. Once your holes are done, you need to clean them up with a files.  Here are the flaring dies that am going to use.   You insert the male part of the die in the hole, the small lip is the exact size of your hole, it will rest in it.  On the other side of the sheetmetal, you then screw the female part of the die  You tighten everything together, once there's no more resitance the hole is formed  You then unscrew the die to discover that your hole has been formed.  You then start over and over again  Until done  Fred |
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Post by Jawfish on Sept 9, 2008 11:21:29 GMT -5
ok not much here to report, On the Locost front, the 1st one just needs to have it's aluminium finished and painted, the 2nd one is getting there...  When that one is finished I'll be jumping right back at the Terrapin...  |
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Post by Jawfish on Jan 28, 2009 12:46:05 GMT -5
Well the locost is being disassembled for cleaning , final welding and reassembly... Time to start thinking about the Terrapin. OK I'm going to build it for our Formula 4 class here in Canada so it's means motorcycle engine and Chain Differential. The plan is to modify the chassis a bit. I will lengthen the engine bay, plus also the mid section for taller Drivers, I'm OK with it, but My Solo 2 co driver wants to drive it and he's a bit longer than me I'll add about 2-4 inches I haven't decided yet... I've reviewed the CASC rules and the Roll bar doesn't have to go all the way to the floor... That's good news since that means that mounting the front hoop will not be complicated. Here the plan for the coming months. • Rebuild the mini hubs • Convert the tapered pin for Rose joint as here jawfish.proboards43.com/index.cgi?board=tech&action=display&thread=76• Build the Front bulkhead • Build the Rear bulkhead • Modify mini drive shaft for front hubs • Build suspension arms Front and Rear • Modify Porsche 914-911 steering rack. • Build a pedal box • Build a chain differential differential I'm keeping the chassis for later, since right now most of the space will be taken for the Locost, in the fall it will go in storage so then I will build my chassis during winter. I will keep you guys up to date on progress... Fred |
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Post by Jawfish on Aug 27, 2009 11:52:32 GMT -5
Work and the locost have kept me from the Terrapin, but this are settling down a bit now and I'm on verge of finally finishing the Locost.
I should restart my build soon,
I'll start tackling some of the task from the list in the comming weeks.
Cheers
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Post by Jawfish on Feb 10, 2014 9:45:29 GMT -5
OK I'm ashamed... I haven't touch this for 5 years. I've got tons of parts for it. I'm going to start taking a full inventory of what I've got. But I'm going to start building the suspensions arms for it, then I'll rebuild the mini uprights. In a way i'd like to have everything on hand before building the chassis.
Cheers.
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Post by golfpin on Jan 20, 2015 23:00:39 GMT -5
Morning Fred,
Keep at it I have just got back onto the forum was looking at those great pics of all the projects. You only have two hands and where you live not really 365 working days unlike me where we have too much sun and too little water! The quality of your work looks outstanding keep it up. Am hoping to post progress on the Golf Donor project [hence the Golfpin ] soon. You might recall I E mailed you a little while back re the sale of the project and subsequently the new owner has contracted me to finish the project.
All the best for the new year.
Golfpin RSA
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) I have a new web provider for my site so pictures are not a problem.
