STIFFY chassis assembly... final cut!

[zeropointbug]

thanks 'RC'

Yah sure! NiMH have no future anyways... the slots are not intended for NiMH cells, they are merely coring to reduce weight, and that's the size of LiPo's. I am using A123 M1 cells however. Hopefully soon to get some Altair Nanosafe Lithium Nano Titanate cells.

The smooth transition from teh cell slots to the servo mounts is just for a smooth profile, and it looks pretty 'kickass' too. :017:

zeropointbug

what program did you use to design the chassis?

[zeropointbug]

Who wants to know? :017:

I used Alibre Design Pro, and did some simulation testing with ALGOR designcheck, VERY handy!

Zero

[BP-Revo]

I think the average yeild strength for 6061 was about 50000 psi while 7075 had something like 90,000. It is pretty close to being twice as strong.

True, that a 7075 wil bend less before it snaps, but if it bends at all you end up with a broken part way.

[zeropointbug]

BPRevo, I think those are maximum 'Ultimate' strength, which is an almost useless number, as it means the max stress at which it can withstand before breaking/failing. Yield strength is what matters, it's the max stress before deformation.

Zero

I am interested in the possibility of a custom chassis. But first I would like to see a solid battery mount (not crazy about straps), and a servo mount. Also interested in how the transmission is going to work. thanks again.

[Serum]

Before you start trying to sell your chassis, i suggest you to contact Mike about it. This is his business you are interfering with.

[Dafni]

As Serum said, this is forum is not meant as a platform for everybody to sell custom work. This is Mike's place, and if you want to offer something, you'll have to contact him first.

We can live with the occasional attempt to sell/buy something used, but offering new products (especially when they directly compete with what Mike does) is definitely out of question without the okay from The Monster.

Thank you!

[zeropointbug]

Hi,

ya i know your right. I did email him with all the specs and a 3D 3DF file to view it.

I also asked if he was interested in selling them for me, if the demand we right, of course.

Zero

[Serum]

You are on the good way then. Only need to wait for a reply..

[zeropointbug]

Thanks for that Serum;

KK, I got a quote for machining these things, and it looks like one will be expensive, and over, say, a few reproductions, the cost would come way down to very affordable. I don't want to state the price on the forum here though, for obvious reasons.

But if I hear enough serious interest in one, I would like to go back and do a little more refining of the design, as people have said they would like 'upper servo mounts', and longer battery tray. I could also loose more weight if i had the time too.

Also, it will cost no more to make the bottom chassis plate from 7075 alloy than 6061. However, the cost is quite a bit higher for 6.25mm 7075 (chassis braces). I'll see what i can do though, and maybe i'll try testing 4.7mm (.1875") 7075?

Cheers

Zero

[zeropointbug]

What do you guys think if I used .1875" (4.7mm) for the chassis braces of 7075 alloy, instead of 6.25mm 6061 alloy. The weight went down to 68 grams versus 93 grams. I also went back to 2.25mm for the chassis plate, weight went from 140 grams, to 100 grams. So far, that shaved off 90 grams from the entire chassis, not bad. If i go back and make the profile of the braces bigger, then do some coring, it would prob be stronger, and lighter.

We'll see

Cheers

Zero

[Mr.lst]

what is this chassis for? revo? let me know

[zeropointbug]

This chassis is for the B-Maxx.

Zero

[zeropointbug]

hey guys

i just did some quick calcs. and what i got was roughly 3.95kg (8.7 lbs) total vehicle weight, not bad at all, considering stock E-Maxx weight is 4.4kg (9.7 lbs).
That's without a body shell.