What alluminium for the chassis??  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Giant Scale Cars >> What alluminium for the chassis??
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What alluminium for the chassis?? - 7/7/2008 12:52:35 PM   
Giorgos_cupra


 

Posts: 44
Joined: 6/30/2008
From: , GREECE
Status: offline 		Well guys,i'm in the process of ordering the alluminium for my chassis.What aluminium should i use?6061 T6 is out of the question...Anything else strong enough?I don't want it to break on me
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RE: What alluminium for the chassis?? - 7/7/2008 2:45:54 PM   
fourwheeler



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Status: offline 		Why is 6061 out of the question??


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RE: What alluminium for the chassis?? - 7/7/2008 4:21:35 PM   
wan6176


 

Posts: 522
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Status: online 		aircraft using 6061.isnt it not strong enuff?

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RE: What alluminium for the chassis?? - 7/7/2008 4:48:10 PM   
Foxy



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Status: offline 		Probably too expensive. Things are different here in greece, there's not much call for the average metalworker to bring 6061, so it will be very expensive, as it's not bought in bulk. What he means Wan, is if there is anything WEAKER than 6061, that will still be strong ENOUGH.

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RE: What alluminium for the chassis?? - 7/7/2008 4:54:40 PM   
wan6176


 

Posts: 522
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From: singapore, SINGAPORE
Status: online 		i seee ok here in spore im using 6061 some piece not using from aircraft i juz cut off abit lolx

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RE: What alluminium for the chassis?? - 7/7/2008 6:53:14 PM   
vertigo performance



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From: Campbell River, BC, CANADA
Status: offline 		5052 is marine grade, still strong but softer. It will bend easier, at the same time it will bend back more often without fracturing.

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RE: What alluminium for the chassis?? - 7/7/2008 7:20:26 PM   
Lunar Wolf


 

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From: Wirral, UNITED KINGDOM
Status: offline 		use wood.

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RE: What alluminium for the chassis?? - 7/7/2008 9:44:02 PM   
kidd


 

Posts: 415
Joined: 11/16/2004
From: , MO, USA
Status: offline 		7075 t6 would be best ,but doesn't like to be bent for front kickup or if the sides are bent to add stiffness.

i wouldn't make a chassis with anything softer than 6061. sherlly, you could find an internet store with international shipping

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RE: What alluminium for the chassis?? - 7/7/2008 10:53:08 PM   
Foxy



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quote:

ORIGINAL: kidd

7075 t6 would be best ,but doesn't like to be bent for front kickup or if the sides are bent to add stiffness.

i wouldn't make a chassis with anything softer than 6061. sherlly, you could find an internet store with international shipping


If he can't get 6061 at a reasonable price, I doubt he's gonna even ask about 7075. Besides, even the FGs and MCDs aren't 7075. On-road cars don't have kick ups, and he is already bending the sides for rigidity, no matter what grade he goes for.

I do agree though, I wouldn't use any grade lower than 6061 myself. That's what I told him at the start. Giorgo, where are you??

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RE: What alluminium for the chassis?? - 7/7/2008 11:04:43 PM   
brice_arnold


 

Posts: 385
Joined: 1/11/2004
From: Los Altos Hills, CA, USA
Status: offline 		It looks like everyone has assumed that this is going to be a pan chassis


Can you clarify what style of chassis you are doing (rail, pan, tubular)? This will help in deciding material

Also why is 6061 out of the question?

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RE: What alluminium for the chassis?? - 7/7/2008 11:19:07 PM   
Foxy



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Status: offline 		I know what it is cos I'm helping him design it. It's a flat chassis with the rough dimensions of an FG sportline. He'll be curling the edges for rigidity, and using a chain and sprocket drive system. This is not going to be an engineering feat Brice, nothing even approaching your level, it's just an experiment right now. It won't even have suspension. Just something that runs, that is home made.

I ASSume 6061 is out of the question due to cost, this is being built on a real shoestring budget, I'm lending him an engine, wheels and tires and a body, just so he/we can try some stuff. I hope he doesn't mind me speaking for him, I kinda got involved and we've been talking about it every day since he started the original thread (it's somewhere on the first or second page, and has more info).

Your input will be highly appreciated Brice, thanks for taking an interest.

< Message edited by Foxy -- 7/7/2008 11:20:21 PM >

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RE: What alluminium for the chassis?? - 7/7/2008 11:21:26 PM   
brice_arnold


 

Posts: 385
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From: Los Altos Hills, CA, USA
Status: offline 		Lets assume you are wanting to do a pan chassis. This is probably the easiest to make.

Here are three specs of materials. Cost, Strength, and Relative Stiffness. Strength and stiffness are different. Simply put the strength is how stress/force the material will hold up to before bending or yielding. The stifness is how stiff the part is or how much it's going to flop around or deflect with a given geometry and force/stress.

These are the most readily available aluminum materials 2024-T3, 5052-H32, 6061-T6, and 7075-T6

Cost (12"x12"x.125" plate in the US) gives you an idea of relative costs

2024- 27.93
5052- 11.85
6061- 15.91
7075- 30.19

Strength (yield)

2024- 50 ksi
5052- 28 ksi
6061- 40 ksi
7075- 73 ksi

Stiffness (Elasticity)

2024- 106000 ksi
5052- 28000 ksi
6061- 100000 ksi
7075- 104000 ksi

As far as more bang for your buck 6061 is the clear choice. There are other things that you may want to consider such as formability (cold working), machinability, weldability, and corrosion resistance. 6061 has good welding and machining characteristics but not so much on the formability. 5052 and 2024 is good for forming but 2024 has poor corrosion resistance. 7075 has great strength but can not be welded and is cost prohibitive along with 2024.

< Message edited by brice_arnold -- 7/7/2008 11:22:59 PM >

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RE: What alluminium for the chassis?? - 7/7/2008 11:25:28 PM   
brice_arnold


 

Posts: 385
Joined: 1/11/2004
From: Los Altos Hills, CA, USA
Status: offline
quote:

ORIGINAL: Foxy

I know what it is cos I'm helping him design it. It's a flat chassis with the rough dimensions of an FG sportline. He'll be curling the edges for rigidity, and using a chain and sprocket drive system. This is not going to be an engineering feat Brice, nothing even approaching your level, it's just an experiment right now. It won't even have suspension. Just something that runs, that is home made.

I ASSume 6061 is out of the question due to cost, this is being built on a real shoestring budget, I'm lending him an engine, wheels and tires and a body, just so he/we can try some stuff. I hope he doesn't mind me speaking for him, I kinda got involved and we've been talking about it every day since he started the original thread (it's somewhere on the first or second page, and has more info).

Your input will be highly appreciated Brice, thanks for taking an interest.


Thanks for clearing that up. I am glad to help if I can.

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RE: What alluminium for the chassis?? - 7/7/2008 11:26:49 PM   
clubin



Posts: 739
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From: North of Wpg., MB, CANADA
Status: offline 		Check on 6065, I made front and rear bumbers/skid plates for my MCD out of it.
Front.

Rear.


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RE: What alluminium for the chassis?? - 7/7/2008 11:28:24 PM