SRB Chassis

[TWINSET]

Given the choice, what would be the ideal place for a 7.2v stick pack (standard 3x2, no radio box)

Along the chassis, or across?

Explain your reasons, show workings in margin[]

[DJTheo]

Since its not located in the middle of the chassis, put longitudially would give smaller moment of inertia around the yaw axis of the car, making it easier to change its direction, more nervous and direct, if put lattitudially it would make it more stable at straights, so it depends what you want from it.

Cheers

[TWINSET]

What about general off-road usage - which would be preferable?

[miramar]

In my SRB runners, I've replaced the radioboxes with F103 chassises with front suspensions and everything from the T-plate and backwards removed, ending up with a doubledeck radioplate on top of the original SRB-chassisplate with the battery mounted transversely in the original F103 battery mount. Overall weight is reduced and CoG lowered. Also front chassisflex and its impact on the steering is massively improved. Of course, durability is improved as well, and replacing the battery is a snap.

I thought about mounting the battery longitudinally instead to improve handling and weight distribution (SRB's are tail-heavy) as the omission of the radiobox gave me that option. However, I don't run my SRB's as racers and with the SRB's, off-road capability and traction is much more important to me than highspeed handling. Compared to an original SRB, without the radiobox even a larger percentage of the weight is located towards the rear axle and traction is further improved, which I consider beneficial for my use.

If I was aiming for topspeed handling and better cornering, I would mount the battery longitudinally. It's definitely not a coincidence that Tamiya did exactly that on the Super Champ.

As Theo puts it, it depends on what you want to achieve!

[TWINSET]

quote:

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Originally posted by miramar

As Theo puts it, it depends on what you want to achieve!

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Can't tell you yet, but quotes so far look promising[]

[Nostromo]

Hi Miramar

can you put some pic´s in your showroom from this SRB with 103 chassis??

I need to see it... [8)]

Regards

Gonzalo

[TWINSET]

I was thinking the exact same thing!

quote:

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My current collection starts with a MIB 58003 and ends with 58288 (at the moment), making for a collection of about 320 Tamiya RC-models, of which about 30 are used, 80 MIB and the rest built but unused

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At least one more would be nice[]

If you haven't got the time, I have a passport and camera, just need the expenses paying[8D]

[Scorchio]

I had a ford f150 with no radio box and just strapped everything along the chassis

Theos right about the yaw axis I found its cornering much improved both on and off road, which is probably why the super champ ended up with battery along chassis.

Workings:

7.2v @ 30mph + specific heat capcity of chassis x % coeficient drag @ max vel= time space vortex&/ a x AO (666) %/$4 stress factor =[8D]

[Cavscout]

Hey Miramar,

How about a couple shots of that SRB with the hunk of chassis from another car used to house the radio stuff. Honestly, I dont think you have or ever had any type of contraption such as what you described, but then again, a picture would prove or disprove your claim. []

Just kidding around of course!

Scott

[TWINSET]

Scott

We got a pic;

http://www.tamiyaclub.com/forum/topic.asp?TOPIC_ID=6031

He speaks both wisdom and truth[]

[miramar]

quote:Originally posted by TWINSET

Scott

We got a pic;

http://www.tamiyaclub.com/forum/topic.asp?TOPIC_ID=6031

He speaks both wisdom and truth[]

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Oh, I'm free at last! [] Oh well, it's only one case closed. Gotta start working on the remaining 319....or so [] Anybody know a good lawyer with a weak heart for a poor Tamiya-infected Norwegian lost in Germany? []