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Discussion in 'Kraton' started by maxbraketorque, Oct 28, 2017.
Adding even a minute profile stiffens sheet metal considerably.
This is good Skidplates! also gives a strength to weakest spot off the chassis.... to the rear (Aft. Deck)
45 Euros. I recomend.
But...I still think they still need to put the chassis plate to 4 mm Thickness.... Definitely!!!!
3mm milled chassis is stronger than a 4mm flat chassis.
I've seen that skid plate/reinforcement, and I like it for what it is. Definitely better than nothing.
How is that even possible?! the 3mm chassis is More flexible....For sure.... weaker!
But definitely... And i think.... the 4mm is be stronger and stiffer... For sure...and i already see in this tread that people also think like that!
I think he's suggesting that for a milled chassis, its possible to include stiffening ribs or possibly other stiffening features. These could make a 3 mm thick chassis stiffer and lighter than a 4 mm thick chassis. I'm not sure that I fully agree with this idea though. A key shortcoming is that any stiffening ribs would have to stop short of the gearbox cases thereby making that transitional area subject to greater flex. Would be interesting to finite element model it. Its amazingly easy to do that kind of thing these days.
Most milled aluminum parts are made from 7k-series aluminum alloys. Most stamped aluminum parts are made from 6k-series aluminum alloys. The 7k alloys are much stiffer, and therefore can be milled for weight savings and still be very strong. if you mill a 6k chassis, you will get a wet noodle.
What he probably meant -
But also worth point out - a 4mm 6k stamped flat chassis would be much cheaper then a milled 3mm 7k chassis.
Where is @gregmbrandt, or the @Voltage Hobbies? They could shed some light on this.
Let's try this extensions hubs.... ))
Voltage just responded to a question I had last night about a possible.full length skip plate they had mentioned. They said they decided against that and will be doing a upgraded cnc aluminum chassis in 2018. unfortunately no mention of 3mm or 4mm..
All of Voltages's stuff is 7k alloy, so I would expect the chassis to be the same. 3mm milled 7k would be a big improvement over the stock chassis. Going to 4mm would require a new screw kit for everything that bolts the chassis.
Probably worth noting that those folks that bash that ThomasP or Rich Superdash will still need tower to tower braces - those 20' high 50' jumps are just plain brutal.
From the man himself -
Front and rear skid plates from Voltage Hobbies
I don't know what Al alloy people use for stamped products, but the comment about milled parts being mostly made from 7-series Al is not correct. 6061 and 7075 are both extremely common for making machined Al components across various industries. Its more a question of strength and cost requirements. And the difference between the two materials is not stiffness but strength. The modulus of elasticity of both materials is only very slightly different. However, when put into deformation, 6061-T6 will take a permanent set at a lower applied load than 7075-T6.
An interesting question is whether ARRMA aluminum parts are made from 6061-T6. My guess is that they are not.
I probably should let Rich speak for himself, but in a recent conversation with him, he mentioned that he's trying to move away from T-to-T braces and instead rely on uprated factory braces.
Point taken. My Milled vs stamped was talking about RC parts, I should have noted that. Most all racing kits use milled 7k alloys, most RTR's use stamped parts that are 6k alloy. I don't know what Hot Racing and GKA mills, but most of the Voltage parts I have looked at are 7k.
This is the best news i'v heard all day ! CANNOT wait for a VH chassis for the Kraton.
We basically need this https://www.ebay.com/itm/Team-Losi-8IGHT-4-0-Buggy-1-8-Aluminum-Chassis-Pre-Drilled-Ready-For-Use-/152211964742?_trksid=p5731.m3795
It was the very first thing that caught my eyes opening the talion v2 and giving it a look.. It's realy thin. 4mm would be good, My previous RTR truggy had 4mm chassie, Some 8 years ago, and that thing never budged... I fear for the one i have atm, Maybe an hop up option with the few screws for the bottom and 4mm chassie would be awsome to have. But then again there is probably a reason for arrma to choose alu type and thickness?
Wonder how much it'd cost to get some 7k series aluminum @6mm thick and have someone Mill out 2mm deep channels in it spaced a quarter inch apart then drill some counter sunk holes on that plate to line up with the stock chassis.
6mm? Dang bro how high you planning on launching that thing?
At some point the weight factor, begins to over shadow the toughness factor. I'm not sure what you guys are doing to your cars, but my chassis is still straight, and they are only like $15 from and Ebay chop shop. Now that I said that I may as well order one, because my bent chassis is right around the corner.
Now they are almost $30.
The whole thing doesn't need to be 6mm even with a few raised channels above the 4mm deck could do it too. Not really adding too too much weight