1/4 Dune Buggy in the works
05-31-2004, 10:12 PM
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RE: 1/4 Dune Buggy in the works
Well, with out spending any cash I use what I had in scrap and some new metal that I had and did a little work. I have completed the rear and front suspensions and part of the cage.
05-31-2004, 10:22 PM
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RE: 1/4 Dune Buggy in the works
Wow! great recovery after the news in your 5/20 post.
Looks very bump compliant! Should be great fun on dirt...or across the front lawn!
Looks very bump compliant! Should be great fun on dirt...or across the front lawn!
06-02-2004, 10:47 PM
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RE: 1/4 Dune Buggy in the works
Eureka!! I found springs to work as coil-overs! This makes finishing the suspension a piece of cake. Now what I need is suggestions on high torque servos. Any help would be appreciated.
06-03-2004, 12:52 PM
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RE: 1/4 Dune Buggy in the works
Looking forward to seeing your coil-overs!
Here's the link to the best high-torque servos for 1/4 scale: http://www.vantec.com/ssps050.htm
Not cheap, but you can spend the rest of your time maintaining your chassis, rather than the steering servo!
Here's the link to the best high-torque servos for 1/4 scale: http://www.vantec.com/ssps050.htm
Not cheap, but you can spend the rest of your time maintaining your chassis, rather than the steering servo!
06-04-2004, 09:11 PM
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RE: 1/4 Dune Buggy in the works
I got the springs today and I now have the full suspension set-up. Here are some pics, one is a close-up of my custom coil-over shocks.
06-04-2004, 10:50 PM
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RE: 1/4 Dune Buggy in the works
THe chassis is 48" long, wheel base is 35", the front track width is 30", the rear track width is 29". I have 7" of wheel travel 4"up and 3" down... hows that for a buggy!?!?! The ground clearance is at about 5.5" but will be around 4" once all the power and controls are installed. So far I am weighing in at 35-40lbs, my final goal weight is not to exceed 65lbs and at the moment it looks as though I'll make it.
06-05-2004, 12:48 PM
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RE: 1/4 Dune Buggy in the works
I found some spring at a local hardware store that were 10"over long with different spring inside sizes . I saw one with a .750 Id size. The problem with the cylinders is they are not to scale. I can make a shock any size I want to. I have no restrictions with the right tools. How much does you buggy weigh now??
06-06-2004, 01:02 AM
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RE: 1/4 Dune Buggy in the works
Not all of us are so fortunate to have a full metal shop.... They are close enough to scale and give me the wheel travel I wanted. So far I am at around 37 lbs.
06-06-2004, 10:13 AM
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RE: 1/4 Dune Buggy in the works
I tried the same shock you did and had some sucess but they kept sticking after too long. So I made my own wich are much smoother. Your buggy should have tipped the scale at 35# with the motor and radio gear. figure another 7-10# more weight. I hope you have a 2 + hp motor to get good preformance any less you will know it.
06-06-2004, 08:56 PM
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RE: 1/4 Dune Buggy in the works
Mbbaj2001-- The shocks should do fine with silicone shock oil in them... a 30cc chainsaw motor with 2.2 hp is more than enough to start with. 35# would be a little conservative of a weight even if I used aluminum. Trust me, I may be new to custom large scale, but I have experience with everything from go-karts to sprint cars and stock cars (the real ones). If I feel the need for more power I can upgrade later. I have done the math and should have a top speed around 38mph (I even used friction co-efficients for the drive train) which is more than fast enough for a large RC car.
06-08-2004, 05:26 PM
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RE: 1/4 Dune Buggy in the works
why limit yourself to 2.2hp. get a sk27cc 3.5hp like mine for $170. as a rear axel chain tensioner maybe adopt one fron like a 10 speed bike. your setup is vera impressive
.
.
06-08-2004, 05:37 PM
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RE: 1/4 Dune Buggy in the works
I already had the chain saw with a 30cc and I can use it to atleast tweak the chassis before getting a bigger one... I know I'll want more power eventually. THanks for the compliament.
06-15-2004, 11:51 PM
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RE: 1/4 Dune Buggy in the works
How does this steering setup look? The only problem I think I might have is clearance when the suspension drops. Any other ideas from anyone?
06-16-2004, 10:34 AM
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RE: 1/4 Dune Buggy in the works
I would turn the ankerman arm around and put the two hole end on the servo side and center the ankerarm between the suspension (up and down) pivots to ensure proper suspension geometry. this way you can add a servo saver and a extra servo. I think you will see you need them.
06-16-2004, 11:14 AM
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RE: 1/4 Dune Buggy in the works
If I reverse the arm I will not have an ackerman set-up.... THis is what allows the inner wheel in the turn to turn a little sharper than the outer wheel giving a tighter steering radius. That is what makes it an ackerman set-up. If reversed it would just be a simple tiller type set up where there is no difference in the rate of turn between the wheels. I want the effect of the ackerman. THe only other setup with this effect that I know of is a bell-crank type like most 1/10 scale cars have, but I think that it has more parts to break and would be too bulky.
06-17-2004, 01:09 AM
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RE: 1/4 Dune Buggy in the works
why don't you just bolt a seat and steering wheel in that thing and use your arms for servos? 48 inches long? sounds like it is big enough to ride in. how long did it take you to manufacture this thing?