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RE: 1/4 scale custom sandrail
Did some more tinkering on the rail today, it looks like I'm going back to the knuckle rear suspension design. I didn't like the clearance I get between the knuckle and the ground, so I figure I will just use bigger wheels. the knuckle is really the most reliable design I can ink of. It looks like I will have to revisit the trailing arm suspension on a future project. So here it is! [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-31191400.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-31191337.jpg[/IMG]
Posted on: 8/31/2012 10:28 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11213072
RE: Need a volunteer to maintain the homebuilds sticky pls...
Hey, I have been meaning to ask to have my build added to the sticky! 1/4 scale custom sandrail!
Posted on: 8/28/2012 9:02 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11209857
RE: 1/4 scale custom sandrail
Diff mounts, and driveshaft mockup [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-17145127.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-17145140.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-17151126.jpg[/IMG]
Posted on: 8/17/2012 3:17 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11197192
RE: 1/4 scale custom sandrail
[IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-11172108.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-11154143.jpg[/IMG]
Posted on: 8/13/2012 7:26 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11192397
RE: 1/4 scale custom sandrail
Another small update, did some more work on designing the suspension. I have one rear trailing arm started, just have to build a shock absorber, and fabricate the alignment links from the frame to the hub. [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-08-11172108.jpg[/IMG]
Posted on: 8/11/2012 8:44 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11189944
RE: 1/4 scale custom sandrail
The reason I want to use this design is the two rods match the travel of the driveshaft. I won't have to make the driveshaft telescope. [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2d9829f1.jpg[/IMG]
Posted on: 7/8/2012 9:43 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11148259
RE: 1/4 scale custom sandrail
So I've been thinking about the rear suspension and driveline, I don't like the clearance I get with the lower a arm I designed.... I still like the trailing arm idea. So I found the polaris ranger rzr has a 3 link trailing arm setup... [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/Polaris-RZR-XP-3Link-1.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/Polaris-RZR-XP-TrailingArm-1.jpg[/IMG]
Posted on: 7/8/2012 1:17 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11147726
RE: 1/4 scale custom sandrail
Did some more work on the rail, got part of the right hand side rear swing arm done. [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-06-15150919.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-06-15150910.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-06-15160933.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-06-15160946.jpg[/IMG]
Posted on: 6/15/2012 3:41 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11119576
RE: British sports car, project.
I'm reading this thread almost disgusted. That is such a high quality, well designed, well thought out, labor of love, it's just not even fair. I won't come close to matching the genius of vass for years and years.... If at all!
Posted on: 6/11/2012 7:58 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11115110
RE: Homemade monster servos
Hey guys, I have been working on a servo for months now, and I present to you my findings and design for a cheap wiper motor servo! I spent probably..... 30 or so dollars on components and motor. I made some vids explaining the build. http://www.youtube.com/watch?v=FEoeRnrFd2M&feature=youtube_gdata_player http://www.youtube.com/watch?v=G5AhYFPnfrM&feature=youtube_gdata_player http://www.youtube.com/watch?v=SvE0QmBSPKM&feature=youtube_gdata_player
Posted on: 6/10/2012 11:14 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11114016
RE: 1/4 scale custom sandrail
Hey guys! I'm back with an update and breakthrough on the project! I had been working this whole time on figuring out a steering setup, I planned on using a windshield wiper motor for a steering servo, but I couldn't find an h bridge that worked or a straightforward explanation on how to build one. After some research on mosfets, motors, etc. I found a circuit that works great for driving a wiper motor, and I modified it a little so that any servo can be used to drive it. I made a few videos on how to build a servo, here is the link. There are three videos because I explain in detail how to build a servo! Enjoy! http://www.youtube.com/watch?v=FEoeRnrFd2M&feature=youtube_gdata_player
Posted on: 6/9/2012 12:39 AM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11112038
RE: 1/4 scale custom sandrail
More rear knuckle pics [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-04-17152156.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-04-17152211.jpg[/IMG]
Posted on: 4/17/2012 9:00 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11046656
RE: 1/4 scale custom sandrail
Thanks guys, it meAns a lot! I'm changing the suspension design a little bit, if I use a trailing arm I would need a driveshaft that telescopes due to the misaligned travel of the swing arm. So I'm going to build a standard suspension setup, here are some pics of my rear knuckle and u joint. [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-03-28151503.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2012-03-28151451.jpg[/IMG]
Posted on: 4/10/2012 6:07 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11036866
RE: 1/4 scale custom sandrail
Im still working on some things. Alot has been going on lately, my dad took his life a week before Christmas so I've been focusing on other things lately. I had to redesign the suspension and drive shafts, I will have some good stuff soon!
Posted on: 4/8/2012 10:02 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=11033952
RE: 1/4 scale custom sandrail
K update on the build, first I have a new video not much progres, but the frame looks more sandrail-y. Link here. https://www.youtube.com/watch?v=thC6IxQN2i8&feature=youtube_gdata_player For the differential, I know I said in the video I was going to make the differential tubes out of metal tube, and I have half done but the tube isn't perfectly round inside so I'm worried about the bearing fitting right. So as I was making it I realized the finished product would look a lot like a stock scooter wheel. So I'm going to try modifying a wheel to make a diff. [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/20111210161504.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/20111210161527.jpg[/IMG]
Posted on: 12/11/2011 5:47 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10854869
RE: 1/4 scale custom sandrail
The suspense-ion is killing me! [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2011-10-22163555.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2011-10-22163605.jpg[/IMG]
Posted on: 10/22/2011 5:03 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10777950
RE: 1/4 scale custom sandrail
[IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2011-10-15133543.jpg[/IMG] As you can see the sprocket is very small! Im hoping that will give me good torque and decent speed...
Posted on: 10/16/2011 5:24 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10768559
RE: 1/4 scale custom sandrail
[IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2011-10-15151053.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2011-10-15133001.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2011-10-15133041.jpg[/IMG] Here is the frame with the suspension layout, I have a few tabs for the rear swingarm welded up, I just have to bend and weld the arm together. also the motor is now sitting sideways, I think I will bag the angle grinder and mount a very small pinion gear straight off the clutch shaft. Hopefully that gives me a good gear ratio. I have the diff figured out, I have those two tubes cut straight and trued up the ends. I will weld a big fender washer to each tube with the middle cut out to match the size of the pipe, then I will bolt those together with another washer in the middle with holes drilled around the center to act as the ball cage. Then the axles will be spring loaded and press against eachother with the balls inbetween!
Posted on: 10/16/2011 8:58 AM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10767851
RE: 1/4 scale custom sandrail
Update time! Sorry its been so long, ive been busy getting my wedding ready! I made a working h bridge, tested and finished the high torque drill motor, I just need to solder it up. Im bagging the angle grinder. I just cant figure it out with my limited tools. I will just run a small spur gear straight from the clutch.
Posted on: 10/15/2011 7:14 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10767217
RE: 1/4 scale custom sandrail
Its not necsesarily a bridge rectifier, its the motor directional relay controller that links the smaller voltage servo to the larger voltage steering motor. It uses transisters or mosfets to to act as a relay that tells the large motor to move in sync with the servo's puny motor. Its giving me problems, I dont think I wired the circuit right because its restricting the power from the battery to drill motor.
Posted on: 8/11/2011 9:11 AM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10665807
RE: 1/4 scale custom sandrail
Not yet actually... Im still in the progress if figuring it out. Plus my steering h bridge needs to be redesigned... I guess it wouldnt handle the current of the motor. It got real hot and started smoking!
Posted on: 8/9/2011 7:19 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10663509
RE: 1/4 scale custom sandrail
[IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/S7300192-1.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/2011-07-29193840.jpg[/IMG]
Posted on: 8/7/2011 1:52 AM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10659126
RE: 1/4 scale custom sandrail
This is my updated steering motor, I found a better drill with all metal gears, and a better way to mount the pinion gear. It has a overtorque safety clutch thingy, so that will be my steering saver once I modify it a little bit. [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/S7300191-1.jpg[/IMG]
Posted on: 8/6/2011 1:34 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10658489
RE: 1/4 scale custom sandrail
Ive actually done that alot before! The gear isnt tapered, or chamfered but I still need to get it deadly accurate. Maybe if I tilt thedrill press base, and secure the dremel to the base.....
Posted on: 8/1/2011 6:11 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10650260
RE: 1/4 scale custom sandrail
Nice! Thats a pretty cool web page! Very interesting! Also it gave me some ideas, namely that a drill press is not as stable and accurate as a lathe, so if I did cut my own tool blade, it would jump and chatter alot. What if I ground 3 tool blades, and arranged them around the workpeice, so it cuts smoothly?
Posted on: 7/31/2011 4:55 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10648299
RE: 1/4 scale custom sandrail
Okay im kinda stuck with the clutch/ grinder setup... I was going to try to find a new shoulder screw to fit the bearing and clutch bell, and then a set screw collar and make some kind of coupling, but the clutch bearing wants an odd size. I think its a 9 millimeter, but I cant find any 9 mm stuff anywhere. Also no ase sizes are even close either. My only option looks like having it lathed down to size, or finding a lathe cutting tip and rigging up something on my drill press to cut it down.
Posted on: 7/30/2011 8:18 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10647208
RE: 1/4 scale custom sandrail
Hmm.. Thats true,maybe I could weld two set screw collars.together to couple the shafts together... This is the shaft and gear. [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/photo-2.jpg[/IMG]
Posted on: 7/28/2011 5:47 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10643937
RE: 1/4 scale custom sandrail
The idea I have could possibly work, its just that I need to shave off sme of the clutch shaft to accept a smaller bearing, and the angle grinder gear. I cant hope to get that accurate with a drill press. I wonder what it would cost me to have a machine shop do it.....
Posted on: 7/27/2011 1:19 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10641764
RE: 1/4 scale custom sandrail
[IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/photo.jpg[/IMG] [IMG]http://i270.photobucket.com/albums/jj94/GoMeR20/photo-3.jpg[/IMG] Steering motor.... CHECK! Scooter tranny cut down.... CHECK! Clutch shaft accurately cut down to accept bearing and gear, and grinder head bolted to said clutch housing..... son of a b........
Posted on: 7/26/2011 10:09 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10640764
RE: the BIG one
Nice! That's it the u bolts look like just the thing! I'm really wishing I had a lathe about now because I need to build the sandrail some sprocket and wheel mounts like that.
Posted on: 7/26/2011 7:14 PM by Author "GoMeR23"
in the forum "RC Giant Scale Cars"
http://www.rcuniverse.com/forum/fb.asp?m=10640552
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