fredswain wrote:You can see in the third picture that I posted that it is a separate piece.
thanks. i was trying to figure out its purpose. to further brace the shock tower? looks like their arms were binding with the front bulkhead too. they took away some material from the arms.
With front bulkhead, not so much... but with steering bellcranks, yes. With full steering and suspension compressed place you pointed out drags heavily on bellcrank... without that cut obviously.
Niki wrote:With front bulkhead, not so much... but with steering bellcranks, yes. With full steering and suspension compressed place you pointed out drags heavily on bellcrank... without that cut obviously. You can imagine I have stared and tested these details with my CAD model for quite some time
-Niki-
looking at these new pictures of the 91 stealth car, are you planning any changes to the parts?
Fred and I have talked about that front bulkhead from the beginning of our project and we always discussed modifying it and the top deck. I plan to cut a chassis with a 1.5mm top deck (accurate replica) and another with 3mm for racing. If you are going to race I think the 3mm makes the most sense; especially if you are ever on a track during practice with SC trucks. One pop from those suckers and the deck could be snapped!
Among other reasons this is probably why the car never made it to production. If the best driver in the world cracked it could you imagine what would have happened in the hands of the avg. joe
Every time I look at the picture I believe looking at the top deck where it goes into the bulkhead, the
bulkhead has been made at the wrong angle, this puts the top deck under tension, so with use it will
crack.
If the top plate met the bulkhead squarely under race conditions and it cracked it should not have
displaced but should still line up.
Cheers, Dave.
It does look like once it broke it "sprung" up. The Nix91 should fix this problem
It's time to stand up to the bully. Support the companies that support the industry, not the ones that tear it down. Say no to Traxxas Factory Works website
That brings up an interesting question. It looks like it sprung up about 5°. Did the car have a 20° kick in some iteration and then go to 25° for the race but retain the same bulkhead?
fredswain wrote:That brings up an interesting question. It looks like it sprung up about 5°. Did the car have a 20° kick in some iteration and then go to 25° for the race but retain the same bulkhead?
i don't know how far curtis went on hand cutting most parts for that buggy, but it could also be a possibility that the top portion of the bulkhead wasn't cut at an angle? with a right hit it was probably what caused the upper deck to break.
fredswain wrote:That brings up an interesting question. It looks like it sprung up about 5°. Did the car have a 20° kick in some iteration and then go to 25° for the race but retain the same bulkhead?
If the bulkhead was cut for a 20 degree kick-up but the angle ended up being 25 then the broken piece of carbon fiber would be pointing downward. Increasing the angle of the kick-up would've sloped the top of the bulkhead down. For something like what you are suggesting to have happened the bulkhead would've had to been cut for a 30 degree kick-up.
it was made for either 30 or 25 and the chassis was fabbed 5 degrees less, 25 or 20. Kind of falls in line with the questioning of the kickup angle earlier. Only the guys that have physical samples of the genuine article now would be able to tell for sure. It's all conjecture otherwise.
Curtis will be resolving this issue for us once the car gets back from Japan. I was about to have a 20 degree mold fabricated but with his willingness to help us I decided to wait
Pretty awesome when the original designers/builders are willing to take time to help on a project like this.
fredswain wrote:That brings up an interesting question. It looks like it sprung up about 5°. Did the car have a 20° kick in some iteration and then go to 25° for the race but retain the same bulkhead?
If the bulkhead was cut for a 20 degree kick-up but the angle ended up being 25 then the broken piece of carbon fiber would be pointing downward. Increasing the angle of the kick-up would've sloped the top of the bulkhead down. For something like what you are suggesting to have happened the bulkhead would've had to been cut for a 30 degree kick-up.
Good point. I was thinking backwards. The question still remains whether they tried a different front kick after that bulkhead was made.
I found this interview with Masami Hirosaka and his protege Naoto Matsukura on YouTube. Masami gives a nice recollection of his experience, specifically the 2WD portion of the 1991 IFMAR World Championships held in Detroit. Some interesting tidbits...
My plan is to take this RPM worlds conversion, clean it up and combine it with a 91 Detroit Worlds chassis to create a 2121 UK Revival entry. I think they should combine pretty seamlessly, am I right?
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Nix91 is very different from the rpm worlds. You are better off getting the factory works chassis set. All your stuff will fit on it nicely.
This started as a project for a friend, but in the process of drawing it up and getting parts together I decided that I needed one too. The suspension arms, bellcranks, shock towers, battery cups, chassis, top plate, etc. were all designed by...
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New Dynotech outdrives installed and gearbox whitened.
Nice to have this one done again.
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Well, this is my first post to RC10 talk. I just found this forum, and I'm still soaking it all in. Really great stuff here!
After cleaning the basement, my kids found my old RC stuff. It's been collecting dust for 25+ years. ( I'll have to post...
Okay, I haven’t released too many projects lately, but… there is a good reason! 😅
As we all love old RC racers, and a benchmark of vintage racing was the Detroit Worlds 91’… we all know who won it, for 2WD. 😉...
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DJerk
I am the one who posted a pic of the C2 Team battery plate on the FB group, but that thread is locked to me now. I have no idea why, but it happens to random threads on that group.
If you can send (email?) me a UPS label, I will send you...
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Yeah in canberra, just moved up from Melbourne. Racing on road tc at kambah and epic at the moment. Just acquired a yz10 that's a bit sad. Missing complete right front suspension, body, wing, wheels/tyres and top plate. A member has already offered...