Losi 8ight Carbon Fiber Chassis
09-19-2007, 10:35 AM
#61
Hi, im doing mechanical engineering at uni and we're covering composites at the moment so I have a couple of questions:
1. Are you using pre-impregnated sheets or is the entire moulding done with fibres and resin by hand?
2. Are you using a woven sheet or unidirectional fibres? If so, have you experimented with the opposite?
3. Once they are available to the public, have you considered offering chassis with varying degrees of flex? Ie. a stiff chassis for smooth, hard packed tracks and a more forgiving chassis for rougher tracks?
4. How many layers are you using?
Thanks.
1. Are you using pre-impregnated sheets or is the entire moulding done with fibres and resin by hand?
2. Are you using a woven sheet or unidirectional fibres? If so, have you experimented with the opposite?
3. Once they are available to the public, have you considered offering chassis with varying degrees of flex? Ie. a stiff chassis for smooth, hard packed tracks and a more forgiving chassis for rougher tracks?
4. How many layers are you using?
Thanks.
09-19-2007, 04:26 PM
#62
Carbon Chassis
Turbine_au- thanks for the reply. We are using all prepreg, and both uni and woven. yes we have talked about the possibilty of different chassis but that isn't in the plans at this time. On the question of how many layers are we using lets just say the chassis is 4mm.
Thanks again for the reply.
Thanks again for the reply.
09-19-2007, 06:33 PM
#63
Tech Apprentice
Looks good, but I got 3 words for you.
Air cooled engine
Air cooled engine
09-19-2007, 10:04 PM
#64
09-19-2007, 10:29 PM
#65
Huh?
I hope your only point isn't that the stock chassis helps to dissapate heat better. If you feel the bottom of the chassis after a 15 minute race, it's only warm around the engine. That's about the same size as the aluminum insert on this chassis. There may be a minimal difference in heat retention, but nothing that will affect performance.
I'm willing to do some product testing to prove that !
I hope your only point isn't that the stock chassis helps to dissapate heat better. If you feel the bottom of the chassis after a 15 minute race, it's only warm around the engine. That's about the same size as the aluminum insert on this chassis. There may be a minimal difference in heat retention, but nothing that will affect performance.
I'm willing to do some product testing to prove that !
09-20-2007, 08:17 AM
#67
Tech Apprentice
xlgraphicspro-
I think you are a little off, the chassis gets hot under the engine and warm throughout the rest of the plate. If the rest of the plate were not there, the area directly under the engine would be that much hotter. Just thermodynamics. Don't be narrowminded enough to think that it will not affect things such as long run tune and so on... for a 5 minute race...maybe not..for a 30 min race...of course it will come into play...start lean and you're done, start a little on the rich side, prolly not a big deal. Just something to think about.
peakman, thats good news.
I think you are a little off, the chassis gets hot under the engine and warm throughout the rest of the plate. If the rest of the plate were not there, the area directly under the engine would be that much hotter. Just thermodynamics. Don't be narrowminded enough to think that it will not affect things such as long run tune and so on... for a 5 minute race...maybe not..for a 30 min race...of course it will come into play...start lean and you're done, start a little on the rich side, prolly not a big deal. Just something to think about.
peakman, thats good news.
09-20-2007, 02:33 PM
#72
Thanks peakman. The chassis looks like it's held up well overall, just the longitudinal extremities that take the brunt of the hits with the rear in particular. Steel skidplates front and rear should cure that, especially if they cover right up to the edges of the chassis
I realise that this might be asking a bit much, but I think it would probably put many peoples' minds at ease if you could describe the type of circuit you're doing the testing on (or better yet--pics!) Also, how many hours do you reckon that you've logged with the carbon chassis to date?
Ultimately, it would be interesting if a local 8ight owner/racer could do some side-by-side comparisons with a conventional kit to see how one performs versus the other... Maybe even enter it in a race to see how it flies
I realise that this might be asking a bit much, but I think it would probably put many peoples' minds at ease if you could describe the type of circuit you're doing the testing on (or better yet--pics!) Also, how many hours do you reckon that you've logged with the carbon chassis to date?
Ultimately, it would be interesting if a local 8ight owner/racer could do some side-by-side comparisons with a conventional kit to see how one performs versus the other... Maybe even enter it in a race to see how it flies
09-20-2007, 03:15 PM
#73
Carbon Chassis
Captain America- here are a few pics of the 1st prototype to compare to Peakmans.
The tracks we have been running on are here in So Cal. The Palomar track is super rough, Thunder Alley, Sun Valley Motorsports in Los Angeles, Full Throttle Hobbies in Bakersfield, last weekend at Revelation Raceway in Ontario, and of course our private test track where we come up with these parts and test them.
This chassis has 5 rounds of the JBRL series on it and about 8 gallons of fuel through it so far.
We will be looking to do a comparrison in the near future.
Hope this helps
The tracks we have been running on are here in So Cal. The Palomar track is super rough, Thunder Alley, Sun Valley Motorsports in Los Angeles, Full Throttle Hobbies in Bakersfield, last weekend at Revelation Raceway in Ontario, and of course our private test track where we come up with these parts and test them.
This chassis has 5 rounds of the JBRL series on it and about 8 gallons of fuel through it so far.
We will be looking to do a comparrison in the near future.
Hope this helps