Finntech

Eurobricks Vassals
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Posts posted by Finntech

  8. Posted · Edited by Finntech

    If somebody has bought instructions from mr. Kuipers, and parts for the car from somewhere and is now selling the car as second handed... Then I don't really see where's the problem. Would be different if he/she have taken lots of copies from instructions and selling them. Or is here something I don't understand?

    E: ok I see now she do not mention that it's NK:s design.. then it is a bit on the grey area.

  13. Posted

    My attept resulted in 3 workable gears (R,1 and 2 (very slow driving)) but the rest will not move the car

    See pics on http://www.mocpages.com/moc.php/290753.

    Bernhard

    Nice, I like it! It's cool to have remote controlled gears. I see you have used m-motor for drive, it is probably just not strong enough for rest of the gears. After I changed the motor to XL, it was slipping and crunching gears, but afer some tweaking (making connections stronger, finding correct gear setup between motor and axle) it worked fine with all gears.

  14. Posted

    You said your goal was to be able to actually drive the car in any gear. From that point of view, it will never work because the car isn't designed for that and the parts can't take it. You can drive very slowly by gearing everything down and probably be OK, but you can't drive fast in high gear no matter how big the motor is.

    Making this model run fast with RC was not my target, but able to drive it in any gear, just like you said. I have now added XL-motor, and it drives very well with gears 1-5 (and reverse). I didn't gear it down as far I have understood what gearing means, I have one 16 gear in motor and second 16 gear in axle what goes trought gearbox (center). That said I don't know these things too well, maybe I geared it down accidentally. :laugh:

    I'm running the motor with 7,2V, so it seems to be quite slow. The car is definitely not going fast even with 5th gear, but it is good speed for model that size. And like I said, my goal was not to make it actually fast. I'd say its top speed is quite perfect to drive inside.

    What pleases me most is the motorized gearbox, changing gear from 4th to 5th and back works very well while driving. It doesn't change speed much, but it works!

    I will try to take good pictures and better video later.

  15. Posted · Edited by Finntech

    Yes, the XL is powerful enough to twist axles even without any gearing. When you add the gear ratio on the 8448 between the motor and the wheels, I don't see any possibility of it not destroying parts. It will work fine on jacks just like the smaller motor, but it takes a lot of torque to actually propel a car that heavy at speed. The issue is not the power of the motor, it is the strength of the drive system.

    I see, you are saying that gears and axles should be stronger, not motor weaker. But still, what if I gear the motor up a bit for a little less torque? And maybe use lighter wheels instead of the originals, would that help? I'm also using 1,2v rechargeable batteries instead of 1,5v, so I assume that the motor provides less torque that way. I'm going to try it anyway, if I destroy gears and axles so be it... I want to see it myself. :laugh: And I have spares.

  16. Posted

    Well I hope that XL-motor won't destroy parts... is it really that powerful? I kind a believe that it will work fine, but let's see. Maybe some gearing is necessary, for build up more speed, since I heard that a XL-motor is much slower than m-motor.

    After I completed the 8448 I actually added jacks for lifting the rear wheels from the ground, just like Blackbird mentioned, and ran the model like that... But it's quite boring in a long run, it is much more fun to actually drive the car.

    I was surprised that only one m-motor was enough to move the car in a different speeds, I wasn't expecting that. I tried one m-motor setup with older 8880 also, but basically it didn't move at all. I guess it was because of 4WD, drivetrain on that model is not very smooth, even though it is very cool design. Maybe 4WD was really the problem, why Trekman's model didn't move well. My model is not crunching at all, of course that might be just because of less torque. Drivetrain keeps noise of course while driving, but it's not crunching, grinding, slipping etc.

  17. Posted · Edited by Finntech

    This is my RC MOD for 8448. It is not ready yet, but I like to start this topic anyway. Hope it don't mind.

    This is a great supercar, and I find out that it may not be too difficult to motorize it with PF-elements. So I want to give it a try.

    I have added

    Propulsion:

    1 m-motor, goes well with gears 1, 2, 3, R, but it's not strong enough for 4 and 5. XL-motor is already ordered.

    Steering:

    1 m-motor to steering, 24 teeth clutch gear + 8 teeth gear. Steering wheel in cabin works

    Gearbox

    2 m-motors for partially remote controlled gearbox, 1 motor in both side, remote: 1+R, 2+3 or 4+5 and free position with all pairs. So when changing e.g. from first to fifth gear, you need to move the gear shifter manually. Dead simple system, works very well. One can think that is useless with only 2 gear + free, but it's so cool to change gear to bigger or smaller while driving!

    Others:

    1 battery box, easily remove

    2 IR-receivers

    2 remote controller

    All the original functions are still working, suspension, convertible top, steering wheel, dummy engine, gearbox

    Here is just a quick video, showing how the PF-elements are added. I will try to take a video of functions if somebody is interested, after I have changed the XL-motor for driving.

    http://www.youtube.com/watch?v=igSChCkTA2k&feature=youtu.be

    Edit: new video of driving, still m-motor and batteries not 100 %. You can hear me changing gears between 2nd and 3rd, and if you look closely, you are able to see it goes faster (obviously) with 3rd gear. In 3rd gear propulsion is louder as you can hear, but it sounds must worse on the video than it actually is.

    http://www.youtube.com/watch?v=nPCWDZfivsQ&feature=youtu.be

    Wheelcaps btw. are from 8157 (system formula), it is matter of taste but I think they look cool. They are easy to take off anyway.

    Sorry I can't describe the functions very well, because of language. Continues, hope you liked this small sample. :classic:

    Udate, pics (sorry about the quality, camera not good):

    8448_1.jpg

    8448_4.jpg

    8448_9.jpg

    8448_3.jpg

    8448_side.jpg

    8448_rear.jpg

    Update edit: pictures seems to be quite large, sorry, I'm helpless with photobucket and can not resize them smaller. :sing:

  18. Posted · Edited by Finntech

    I had the same problem where one of the IR-receivers ports was not working.

    Kind a wrong topic, but right now I have the same problem. One of the ports is not working. The IR-receivers are not mounted to excavator at the moment, so it is not that "black brick" problem... I'm building other stuff and using recivers for that. There's m-motor attached to both ports, the green light is flashnig while using remote (from both ports) but second m-motor keeps quiet. Really annoying, I don't believe it's broken, since it worked on excavator just fine...

    EDIT: I changed the motors vice versa and now it works, both ports... Interesting!