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Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 10:47
by marcush.
with the upright mandatory in aluminium ..and the hub either steel or ti the bearing preload /tolerance will not only be swiss watch ...but could vary quite a bit ......wouldn´t it be more useful to have one bearing carrier slotting in the upright and eliminate/avoid this tolerance/ alignment/calibration hassle? would be stiffer as well I guess.
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 11:02
by xpensive
marcush. wrote:with the upright mandatory in aluminium ..and the hub either steel or ti the bearing preload /tolerance will not only be swiss watch ...but could vary quite a bit ......wouldn´t it be more useful to have one bearing carrier slotting in the upright and eliminate/avoid this tolerance/ alignment/calibration hassle? would be stiffer as well I guess.
I guess you mean sliding, but the problem is that what you typically want is as a clearance-free operation as possible,
even when axial-load is shifting left to right, but perhaps that is not an issue in an F1-car upright though?
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 11:30
by marcush.
no ...I thought more about this concept have preloaded assembly bolted to the upright or alternatively make the assembly a pressfit into the upright:
http://www.schaeffler.com/remotemedien/ ... ung_dt.jpg
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 12:09
by xpensive
That is typically what the Automotive industry is doing these days in order to simlplify production, please not the outer-race is integrated with the housing and the inner-race on a pressfit on the hollow shaft-stub. Downside is that you need to change the enire assy in order to install new wheel-bearings, while you still need to decide on your clearance/preload somewhere, probably a light preload by the inner-race, calibrated at assembly.
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 12:35
by newyorkkopter
yea so I think I'll go with the drive cups.
I'm assuming that's what the 1/5 scale FG F1 uses as well judging from this
http://www.google.com/imgres?imgurl=htt ... s%3Disch:1
If you scroll you can see the differential for the FG F1, it has drive cups
Hopefully it'll work well!
Brings up another concern ...this thread on bearing carrier ..is this a good solution ? you will need to have some tolerance to be sure you can properly engage amnd tighten the carrier ,but then you will not be able to calibrate the bearings for the hub/stub shaft ,would you? the shaft will always see some misalignment so they need to go to a loose bearing tolerance to counter this? Is this something that is even practical for ceramic balls?
the needle /roller bearing thing i have seen on some BMW wheelbearing assemblies in series ,if i remember correctly...
marcush, was that meant for me?
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 14:03
by marcush.
not quite ..
but for sure friction and bind in your suspension and power transmission is something to look into ....I rmember all those RC cars having huge amounts of slack and give in their suspension...can this be a good thing for tyre wear and control?
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 18:53
by wrcsti
They make a part for RC cars that prevents the dogbones from coming out of place, maybe you can incorporate this to yours. Also HPI has started making the formula 10 as s supposed f1 rc car kit.
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 19:20
by mep
All the bones I have seen are to short for proper scale.
Just as the tires don't fit to any scale.
I wonder why they those companies can't do it right.
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 19:38
by 747heavy
because it´s not a proper scale model, they race these cars and optimize them for driving.
To make it perfect scale, you would also need to make a functional V8 engine.
It´s not impossible, but the costs would be astronomic height.
The "dog bone" drive shafts are easy to make in any length you want, so that should not be much of a problem. - IMHO
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 20:13
by mep
The "dog bone" drive shafts are easy to make in any length you want, so that should not be much of a problem. - IMHO
Exatly thats why I wonder why they do them to small.
As I remember is car width to narrow of the F1 cars they sell.
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 20:37
by marcush.
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 26 Aug 2010, 23:02
by 747heavy
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 27 Aug 2010, 01:41
by 747heavy
hi newyorkkopter
You can find many good detail photos from different older F1 cars/engines here:
Enjoy:
http://www.f1-forecast.com/index.php?op ... 40&lang=en
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 27 Aug 2010, 12:49
by newyorkkopter
you got me again with those pics
excellent finds, honestly
Thanks again!
btw thats a sick pic of the engine and transmission and driveshafts; look at those headers!
They make a part for RC cars that prevents the dogbones from coming out of place
Hey that could come into use. wrcsti, do you have more info about it?
Like what its called? I tried looking for it, but didn't find it
but for sure friction and bind in your suspension and power transmission is something to look into
Marcush, could you explain this more; like how exactly would I know whether or not the the friction, bind, and power transmission is decent or horrible?
Re: 1/4 Scale R/C F1 (Regarding Chassis and suspension)
Posted: 31 Aug 2010, 18:52
by 747heavy
Hi,
maybe you get some inspiration for your project from this guy.
http://www.youtube.com/watch?v=SeUMDY01 ... v-1r-10-HM
That´s absolute incredibale, well worth to look at it.
