Looking for a Rear Wheel Drive OnRoad Car
03-23-2013, 02:46 PM
#201
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RE: Looking for a Rear Wheel Drive OnRoad Car
What you are asking for, really doesn't exist....
The IFMAR GT class offers a few, very competitive RWD cars: Team CRC/Calandra,Tamiya, andSerpent are all kits you have to build (gasp)!
Also, GT cars, or any pan cars for that matter, are absolutely NOT for beginners. The suspension and drivetrains, on these cars are -in no way -forgiving.
HPI Racing is supposed to release an RTR car, which does fit your description: http://www.bigsquidrc.com/hpi-tc10-2wd-on-road-rtr/
No news on the HPI website: http://www.hpiracing.com/
The other option, as mentioned before, is a Tamiya RWD M-chassis. But, most Tamiya cars are kits.
Good luck....
The IFMAR GT class offers a few, very competitive RWD cars: Team CRC/Calandra,Tamiya, andSerpent are all kits you have to build (gasp)!
Also, GT cars, or any pan cars for that matter, are absolutely NOT for beginners. The suspension and drivetrains, on these cars are -in no way -forgiving.
HPI Racing is supposed to release an RTR car, which does fit your description: http://www.bigsquidrc.com/hpi-tc10-2wd-on-road-rtr/
No news on the HPI website: http://www.hpiracing.com/
The other option, as mentioned before, is a Tamiya RWD M-chassis. But, most Tamiya cars are kits.
Good luck....
ORIGINAL: -JBLKING-
Im interested in recreating a RWD model (Will look at AWD/4WD later) and am wondering about what platforms out there offer that. I am a novice in the RC hobby so i havent looked into on road cars yet. My requirements are that the model be RTR, RWD, Electric. All opinions and advice welcome. Thank you!
Im interested in recreating a RWD model (Will look at AWD/4WD later) and am wondering about what platforms out there offer that. I am a novice in the RC hobby so i havent looked into on road cars yet. My requirements are that the model be RTR, RWD, Electric. All opinions and advice welcome. Thank you!
03-27-2013, 07:05 PM
#202
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RE: Looking for a Rear Wheel Drive OnRoad Car
Finally got some more done...! Made magnetic mounts for attaching the body to the chassis...magnets encased in styrene attached to the body as well as corresponding magnets mounted to the chassis...
Also got the wiring sorted out, plumbed through the rocker panels to the trunk....did a test drive in the living room, brakes worked out pretty good..will test outside tomorrow in the day light and get some vids. Then it's strip everything out and prep for painting!
More to come soon!
03-28-2013, 04:08 PM
#204
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RE: Looking for a Rear Wheel Drive OnRoad Car
Some test vid...! Nothing spectacular though......
Raw video as I still need to figure out how to edit video on the iPAD!
http://youtu.be/Be7EmTvUPVw
Raw video as I still need to figure out how to edit video on the iPAD!
http://youtu.be/Be7EmTvUPVw
03-29-2013, 07:32 AM
#205
RE: Looking for a Rear Wheel Drive OnRoad Car
Wow hahaha that's cool as hell it is popping wheelies hahaha! I bet you had a large grin on your face the first time it did. How does it do under sustained cornering ? It looks like it is fun to drive.
Would you say it handles more like a good on-roader, or would it be more comfortable in rougher and a tad slippery terrain ? I'd like to see it in slippery conditions like dirt, but I can understand you would not want to put this piece of art in the mud.
I'd like to see a video of the suspension working, I mean you pushing the car's suspension manually and see how it operates (with and without body), like how the solid axle tucks in when you compress only one side, or both sides, push the rear only, front only etc.
Thanks for posting the vid!
03-29-2013, 08:40 AM
#206
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RE: Looking for a Rear Wheel Drive OnRoad Car
ORIGINAL: Frederik_b
Wow hahaha that's cool as hell it is popping wheelies hahaha! I bet you had a large grin on your face the first time it did. How does it do under sustained cornering ? It looks like it is fun to drive.
Would you say it handles more like a good on-roader, or would it be more comfortable in rougher and a tad slippery terrain ? I'd like to see it in slippery conditions like dirt, but I can understand you would not want to put this piece of art in the mud.
I'd like to see a video of the suspension working, I mean you pushing the car's suspension manually and see how it operates (with and without body), like how the solid axle tucks in when you compress only one side, or both sides, push the rear only, front only etc.
Thanks for posting the vid!
Yep ... Had a big ole grin plastered from ear to ear! Boy was I surprised when it did that! My first thought was ' no way ! Can I do that again?' !! Lol!
That was basically all the testing I did. Just wanted to make sure that all the basic functions were good and that there wasn't any binding up etc before I paint it. Don't wanna take it apart afterwards unless I really have to!
Don't worry.... It's a rally car! It's gonna see dirt and fine gravel at least! Not too sure how mud will affect the disc pads and rotors though! I just didn't want too much dirt and grime on the plastic before I paint it!
I will try to do some video of the suspension this weekend !
I built it with decent ground clearance so it should do well in the dirt bit we'll see for sure once its been painted! Lol!
03-29-2013, 08:48 AM
#207
RE: Looking for a Rear Wheel Drive OnRoad Car
Looking forward to it. How soft is the rear suspension now ? Does it have some droop when you lift the car, or is there a lot weight needed to start flexing the leaf springs ?
It's funny it's pulling wheelies with all the weight of the motor, steering servo and tranny up front. But there is the battery in the back behind the axle too so that is probably more than offsetting all this.
03-29-2013, 09:29 AM
#208
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RE: Looking for a Rear Wheel Drive OnRoad Car
Without the battery, if you push on the rear suspension, it moves maybe 5-6 mms. With the battery it moves maybe 3mms.
Without the battery almost no droop, with the battery about 3mms of droop!
From a dead stop, it won't pull wheelies, but it does it if the car is rolling backwards so its the weight of the battery as well as the location ( behind the rear axle) that's causing it to pivot and wheelie!
I'm a bit concerned about the rear leaf springs, I'm wondering whether they may get out of shape because of the weight etc. I do have some spring filled dampers that I was considering using, but because the diff is somewhat off center on the axle getting them placed evenly on either side is an issue. After looking at the vid I'm considering using some coils springs that I have left over from my crawler that I can possibly mount evenly on either side of the axle. However the 1:1 car does not carry these but dampers instead!
Without the battery almost no droop, with the battery about 3mms of droop!
From a dead stop, it won't pull wheelies, but it does it if the car is rolling backwards so its the weight of the battery as well as the location ( behind the rear axle) that's causing it to pivot and wheelie!
I'm a bit concerned about the rear leaf springs, I'm wondering whether they may get out of shape because of the weight etc. I do have some spring filled dampers that I was considering using, but because the diff is somewhat off center on the axle getting them placed evenly on either side is an issue. After looking at the vid I'm considering using some coils springs that I have left over from my crawler that I can possibly mount evenly on either side of the axle. However the 1:1 car does not carry these but dampers instead!
03-29-2013, 10:30 AM
#209
RE: Looking for a Rear Wheel Drive OnRoad Car
I would think the leaf springs are made of some kind of spring steel which is made to handle flex without bending out of shape permanently.
But if looking to another somewhat realistic suspension for an MK2, look for four link setups, they are used in rallying. That is what I am doing with mine, see pictures below. Not sure yet how the shocks will attach, probably another set of custom brackets 
or attach to the lower linkages. Also I am insure if the lateral location of the axle will be made by a simple panhard rod ormwith a more complex watts linkage. Watts is the one with the two arms attaching to the diff housing center. It is better because the axle does not move laterally as you compress the suspension, while a panhard rod does shift a bit to one side.
or attach to the lower linkages. Also I am insure if the lateral location of the axle will be made by a simple panhard rod ormwith a more complex watts linkage. Watts is the one with the two arms attaching to the diff housing center. It is better because the axle does not move laterally as you compress the suspension, while a panhard rod does shift a bit to one side.See this page it shows the four link system, it happens to be in french but you'll figure out the pics
http://rcma.free.fr/escort/4link.htm
And here is where I am at with mine, integrating it to the CC01 axle:
03-29-2013, 10:54 AM
#210
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RE: Looking for a Rear Wheel Drive OnRoad Car
That 4 link looks pretty good! I will probably go this route if the leaf setup does not last. Will definitely consider the 4 link for the next build!
Good job on those brackets!
Good job on those brackets!
03-29-2013, 05:11 PM
#211
RE: Looking for a Rear Wheel Drive OnRoad Car
Thanks! I am trying to find a gearbox right now for mine, what is a good overall ratio for this type of car ? Does your gearbox gives a satisfactory result as far as ratio goes?
I guess I'll calculate my tamiya tb-01 ratio and start from there.
03-30-2013, 05:22 AM
#212
RE: Looking for a Rear Wheel Drive OnRoad Car
Looking again at your video, regarding your rear suspension,I think it would be just perfect if you add the shocks only, without the springs. I think it will be too hard with additional springs, and having it slightly soft is nice for more realism!
If you need just a tad more firmness I would try and find a way to mod the leaf springs. Shortening the leaf springs with a kind of adjustable attachment point (maybe at the read) would increase the leaf spring stiffness, having it adjustable would be neat.
The other day I was looking at a pickup rear end at a red light and noticed how they have brackets on the axle to attach the shocks lower than the axle (the shocks poke down a little from the axle) leaving more room between top of the axle and chassis.
Also having the shocks at an angle (like on the actual escort, the pic you posted I believe) will help making it fit. And it also make it possible to use shorter shocks because having them at an angle increases the suspension trave to shock movement ratio. You just use thicker oil to compensate for this ratio if you need more dampening.
In the vid you can see the live axle action whennit pops a wheelie from one side only because of the axle rotational torque. Very cool!!
have you got any pictures of the underside of the car?
have you got any pictures of the underside of the car?
03-30-2013, 05:47 AM
#213
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RE: Looking for a Rear Wheel Drive OnRoad Car
Haven't actually taken pics of the underside yet but have been meaning to do so. If you notice the 'U bolts' that hold the axle to the leaf spring, you may notice that one side of the u-bolt on the inside of the leaf is a bit longer than the others. I had initially done it this way with the intention of adding shocks like the 1:1 car! But because of the off center diff on the axle, I couldn't find shocks short enough/scale looking enough to fit evenly on both sides. However I will revisit this idea this weekend when I take it apart to start the paint prep!
I also have been considering adding another leaf. The leaf spring was initially a 3 piece assembly from the Tamiya Trailer. It felt to stiff like that so I cut the rivet off that held them together and used the main leaf only. So I may try adding one of the other pieces to see which one will strengthen the suspension without making it to stiff.
I also have been considering adding another leaf. The leaf spring was initially a 3 piece assembly from the Tamiya Trailer. It felt to stiff like that so I cut the rivet off that held them together and used the main leaf only. So I may try adding one of the other pieces to see which one will strengthen the suspension without making it to stiff.
03-30-2013, 06:56 AM
#215
RE: Looking for a Rear Wheel Drive OnRoad Car
I see there is not much space for shocks, tthe only space fully available is used by the leaf springs. Maybe youll get lucky and find a diagonal spot where smaller shocks might fit. For mine I have bought losi mini late model shocks for the front, they have a fairly narrow threaded body so I will be using them for front macpherson strut suspension. But there are shorter versions of the same shocks too, given you dont need springs on the shocks that opens up a little bit more space.
03-30-2013, 07:29 AM
#216
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RE: Looking for a Rear Wheel Drive OnRoad Car
Hey thanks! Will definitely look into the shorter version of those shocks!
The initial thought was that this was going to be a budget build ! Ha! I guess this car had a mind of its own...! Lol!
The initial thought was that this was going to be a budget build ! Ha! I guess this car had a mind of its own...! Lol!
03-30-2013, 08:15 AM
#217
RE: Looking for a Rear Wheel Drive OnRoad Car
Tis is what I was talking about (shorter version)
http://www.cafr.ebay.ca/itm/TEAM-LOSI-SEDAN-RACING-THREADED-SHOCKS-RC-/360531336628
If you think its too short then there are the mini late model like I have bought.
sorry its in french.. Get the item number andopen it on your ebay.
you can remove the spring and collar and should be pretty small.
sorry its in french.. Get the item number andopen it on your ebay.
you can remove the spring and collar and should be pretty small.
03-30-2013, 08:45 AM
#218
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RE: Looking for a Rear Wheel Drive OnRoad Car
Hey that looks pretty good! Thanks Frederick! I found on the US eBay! I will verify the measurements on the car when I get home tonight and once it will work, I'll pick up a set !
03-30-2013, 05:38 PM
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RE: Looking for a Rear Wheel Drive OnRoad Car
The turn radius is ok. Needs some tweaking. The shoulder screws that I used on the bottom of the front shocks need to be changed as they are a bit too long, causing the inside of the wheel to bump on the bottonm of the shock .
Also the reason it looks that way in the video is that the steering and front brake is on the same stick. So left to right at center position the steering turns good. However , if you pull slightly on the stick the brake begins to engage.
So what was happening in the vid is that when turning I was also pulling slightly on the stick causing the wheels to start locking up. When driving forward and this happens the front wheels begging to drag instead of rolling smoothly with the turn.
Also the reason it looks that way in the video is that the steering and front brake is on the same stick. So left to right at center position the steering turns good. However , if you pull slightly on the stick the brake begins to engage.
So what was happening in the vid is that when turning I was also pulling slightly on the stick causing the wheels to start locking up. When driving forward and this happens the front wheels begging to drag instead of rolling smoothly with the turn.
04-01-2013, 09:00 AM
#221
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RE: Looking for a Rear Wheel Drive OnRoad Car
Prestonal, if you can help me out, I posted a question about plastruct on my prerunner thread. Thanks!
04-05-2013, 10:42 AM
#222
RE: Looking for a Rear Wheel Drive OnRoad Car
Just wanted to let you know the Mini Late Model shocks I ordered (LOSB1289) are NOT what I expected, they are much smaller than I thought.
I might try to make them work for my macpherson suspension but they are very small and I fear they will damage easily especially since with macpherson there is more side force on the shock because the wheel is basically attached to the shock body.
They are 9mm diameter shock body, 56.5mm eye to eye decompressed and 39.5mm compressed, 2mm shock shaft.
04-09-2013, 06:47 PM
#223
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RE: Looking for a Rear Wheel Drive OnRoad Car
ORIGINAL: prestonlal
I used styrene round rods to make the cage...1/4" I believe it was....
The rc motorbikes disc brakes are functional. Mechanically operated by a cable attached to a servo....!
I used styrene round rods to make the cage...1/4" I believe it was....
The rc motorbikes disc brakes are functional. Mechanically operated by a cable attached to a servo....!
04-21-2013, 04:46 AM
#224
RE: Looking for a Rear Wheel Drive OnRoad Car
I ordered the same gearbox for my project! It says it needs a reverse spinning motor, because the single stage gearing changes the rotation. Did you just switch the wires and run the motor backwards? I read motors run faster on their designed optimized direction because of the timing adjustment, but I dont think its a big difference for a fun car. I thought I would be dealing with at but I ended up using the axle upside down for brackets clearance issues with my frame, and running the axle upside down flips the rotation one more time sho it looks like I'll have the motor spinning the correct side !
I got a tamiya sport tuned motor (black can) too. And I found another set of losi shocks, the correct size this time lol and been thinking of an easy way to do the front macpherson knuckles and bearings holder, I think it will work nicely.
Also settled on the axle location mechanism: 4 link will hold fore-aft position, and watts link will hold the sideways location. Been doing some testing and I will use links from my traxxas nitro stampede, they have all the proper lenghhts!
04-21-2013, 05:29 AM
#225
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RE: Looking for a Rear Wheel Drive OnRoad Car
[quote]ORIGINAL: Frederik_b
I ordered the same gearbox for my project! It says it needs a reverse spinning motor, because the single stage gearing changes the rotation. Did you just switch the wires and run the motor backwards? I read motors run faster on their designed optimized direction because of the timing adjustment, but I dont think its a big difference for a fun car.
Hey that's cool! Yeah that gearbox runs pretty solid. I think that the reason they say it requires a reverse spinning motor is because as its an airplane gearbox, if you use a regular motor on the plane, the prop will spin in the wrong direction. If I remember correctly, when I set it up I had to reverse the throttle switch on the controller. So that when you pull the trigger on the transmitter it moves forward.
Hey that's cool! Yeah that gearbox runs pretty solid. I think that the reason they say it requires a reverse spinning motor is because as its an airplane gearbox, if you use a regular motor on the plane, the prop will spin in the wrong direction. If I remember correctly, when I set it up I had to reverse the throttle switch on the controller. So that when you pull the trigger on the transmitter it moves forward.
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