My bold of Brian's comment. I don't see how you would possibly fit with the bracing as shown.Quote:
Originally Posted by Hardingfv32
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My bold of Brian's comment. I don't see how you would possibly fit with the bracing as shown.Quote:
Originally Posted by Hardingfv32
All the FIA roll bar padding I've seen is 3/4"-1" thick.Quote:
Originally Posted by Hardingfv32
There's alot to consider while you're in pre-design...glad you're taking time to plan for safety as well as anxious to get out for the fun.
Glenn
SFI I see is also 3/4 minimum (I didn't look up the rule itself).Quote:
Originally Posted by pacratt
http://www.rollbarpadding.com
I admit I haven't read all the posts, but did scan most of them, and something I haven't seen suggested is to move your headrest back, behind the main hoop; how far will be limited by the carb - I think.... This will give some additional room, though maybe not enough to solve your helmet clearance problem. The comment(s) about adding a higher front roll hoop are good suggestions especially since it will give your legs more room and will improve the ease with which you can extract yourself from the car, though it will likely also require a change to the body work. Lowering the floorpan is a bad idea in my opinion unless you have a steel frame to support it, because when, not if, you go off-track, the lowest part of the car is what will contact the track, rocks, etc. Also, I have successfully used 1/2" thick ethafoam for my seat pad and have not had any soreness issues; certainly thicker would be better, so perhaps you can get by with less.
Something else worth mentioning - not shown in the photos you posted, is pedal position and pedal travel - both need to be taken into consideration for you feet placement which then directly relate to seating position and then helmet height. The suggestion(s) about checking out other cars is excellent so you can what others have done to deal with these challenges.
Good luck.
-Jim
Really enjoying all the bike-shedding discussion and contributions about the best way to go about this. I showed the plans to Ron Chuck and he suggested moving the lateral support bar up and adding more gussets and was generally supportive of the changes.
Here is a modification in line with the suggestions of taller front roll bar. Only problem is it makes the bodywork completely unworkable - no way to pass that bar through the top. At a guess I would I have to chop it in half and have more fasteners in the middle? Would end up looking a bit "complicated".
https://www.apexspeed.com/forums/att...d=115043&stc=1https://www.apexspeed.com/forums/att...d=115044&stc=1https://www.apexspeed.com/forums/att...d=115045&stc=1
If you think the comments being provided for YOUR benefit are "bike-shedding", then perhaps you really aren't interested in the input from existing racers of the car/class you are interested in joining. From what I have read, most of the comments are valid and useful and take time to type, which you apparently don't seem to appreciate.
-Jim
Perhaps I misspoke - usage of the term bike shedding used to denote the back-and-forth over details, no discounting of information implied.Quote:
Originally Posted by sabre1fv
Very much appreciative of everyone's contributions, interest in my project and experience. Can't think of a more positive/supportive group to converse with.
Just a thought, regarding fitment of the cowl...
Perhaps sliding it forward until the front hoop & braces are inside...trimming the front until it fits to the nose...then extending the rear with new glass to meet the tail.
Of course I'm simplifying and going on ALOT of assumptions based on the little I see here.
I had to do what I just described on a vee of my own for the very same reasons - fitting around a taller front hoop.
Glenn
Your images of potential changes are very nice, however they may not represent how you will really fit . Consider removing the steering support area, main hoop forward bracing while temporarily leaving the hoop. Work out changes with some cheap tubing (emt conduit) until you are most comfortable. Reconsider bends in the main bracing and low rearward bracing to the removable element.
Have fun and go racing
Ooh yea, I get it. Definitely a better idea than chopping it in half, thanks.Quote:
Originally Posted by pacratt
Yes! Another great idea. A trip to the homeless despot is in my near future...Quote:
Originally Posted by jrh3
Bike shedding is an interesting term. Is this something you learn in engineering school?
I learned something today!
Brian
Don’t forget some pre made bends if you don’t have a benderQuote:
Originally Posted by CharlesVsWorld
Yes we tend to throw it around at work (software engineering) at times of collaborative brainstorming. I hadn't considered the diminutive nature of the term until I read @sabre1fv 's post so fair play to him, I'll suck it back up.Quote:
Originally Posted by Hardingfv32
Ok this mock up with insulation tubing is looking like a viable concept, gives much more knee room and will work with minimal modifications to the bodywork:
https://www.apexspeed.com/forums/att...d=115227&stc=1 https://www.apexspeed.com/forums/att...d=115228&stc=1 https://www.apexspeed.com/forums/att...d=115229&stc=1
Support tubes will fit underneath as well. Will mock those up next. Also got the motor assembled and ready to test minus the rocker assemblies
https://www.apexspeed.com/forums/att...d=115230&stc=1
With much machination and conversion from metric to king appendages I present a close to final design:
https://www.apexspeed.com/forums/att...d=115336&stc=1
Arranged in the following manner:
https://www.apexspeed.com/forums/att...d=115337&stc=1
Should produce the desired clearances and free up room inside the cockpit while fitting mostly under the bodywork. Comments/suggestions/improvements?
Threads not dead! Just been waiting on an order of DOM tube which happily arrived today - got plenty of welding to do on the weekend:
https://www.apexspeed.com/forums/att...d=115658&stc=1
Also designed an enclosure for the fuel cell area and finalized the safety cage structure, went up to 1" front support tubes:
https://www.apexspeed.com/forums/att...d=115659&stc=1 https://www.apexspeed.com/forums/att...d=115660&stc=1