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Sariel's Scania Racing Truck


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#1 Ayumi

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Posted 07 July 2010 - 12:52 PM

Here is a new work of my friend from Poland.
Posted Image
movie!
Topic on polish forum

Edited by Ayumi, 07 July 2010 - 12:53 PM.


#2 Sariel

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Posted 07 July 2010 - 01:10 PM

And the description in English: http://sariel.pl/201...a-racing-truck/
Damn, someone beat me to posting my own creation  :blush:
With great power comes great electricity bill.

My hamster-powered creations at: Sariel.pl | Brickshelf | YouTube | Facebook

#3 Jurgen Krooshoop

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Posted 07 July 2010 - 06:35 PM

This is one truly magnificent creation. Its looks are fantastic and its performance (driving almost 8 km/h) impressive. I guess that RC-motor is very suitable for making fast Lego-vehicules. I've noticed that while making small racecars, one using an XL-motor, the other one an RC-motor. The latter one performs noticably better in accelleration and max-speed (and will be published ASAP including instructions).

Edited by Jurgen Krooshoop, 07 July 2010 - 06:36 PM.


#4 Marckeyh

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Posted 07 July 2010 - 10:18 PM

That's pretty amazing! Makes me want to build one myself.  :thumbup:

#5 Paul B

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Posted 07 July 2010 - 11:08 PM

That looks very cool, well done.

Paul

#6 Zblj

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Posted 08 July 2010 - 06:40 AM

One question. How do IR receivers take the massive current, the RC motors use up. Because when i tryed connecting aan RC motor to PF receiver, the reciver would crash when motor was soo loaded (like by accelerating). I really like how you combined the studdeed cab with studless chassis.

#7 Ayumi

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Posted 08 July 2010 - 08:13 AM

Zblj,
One IR receiver can not cope with two RC engines.
One battery (no battery box) can not cope with two RC engines.
Two batteries and 2 IR receivers on the same channel.
Look here!

Edited by Ayumi, 08 July 2010 - 08:15 AM.


#8 Zblj

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Posted 08 July 2010 - 08:33 AM

View PostAyumi, on 08 July 2010 - 08:13 AM, said:

Zblj,
One IR receiver can not cope with two RC engines.
One battery (no battery box) can not cope with two RC engines.
Two batteries and 2 IR receivers on the same channel.
Look here!

I know, but my receiver crashed by one RC motor... Anyway its smarter to use 2 battery boxes and receivers, because it drives longer  :classic:

#9 KielDaMan

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Posted 08 July 2010 - 08:50 AM

Great truck Sariel! Posted Image I love everything about it.

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#10 Jurgen Krooshoop

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Posted 08 July 2010 - 08:58 AM

View PostZblj, on 08 July 2010 - 06:40 AM, said:

One question. How do IR receivers take the massive current, the RC motors use up. Because when i tryed connecting aan RC motor to PF receiver, the reciver would crash when motor was soo loaded (like by accelerating). I really like how you combined the studdeed cab with studless chassis.
I've noticed something similar with my racecar using an RC-motor. Sometimes, it takes about a 2 seconds for the receiver to respond, while my previous car (using an XL-motor) never had that problem. Maybe the receiver doesn't get enough power sometimes.

#11 Sariel

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Posted 08 July 2010 - 09:20 AM

View PostJurgen Krooshoop, on 08 July 2010 - 08:58 AM, said:

Sometimes, it takes about a 2 seconds for the receiver to respond

Oh, you're referring to the common occurrence of the RC motors overheating. It happens under load, when they require a current so high that the safety measures built into IR receivers cut the energy off for a few seconds. It happens with this truck too sometimes, usually when I continuously use motors for braking at high speed.

Edited by Sariel, 08 July 2010 - 09:20 AM.

With great power comes great electricity bill.

My hamster-powered creations at: Sariel.pl | Brickshelf | YouTube | Facebook

#12 Jurgen Krooshoop

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Posted 08 July 2010 - 10:09 AM

View PostSariel, on 08 July 2010 - 09:20 AM, said:

Oh, you're referring to the common occurrence of the RC motors overheating. It happens under load, when they require a current so high that the safety measures built into IR receivers cut the energy off for a few seconds. It happens with this truck too sometimes, usually when I continuously use motors for braking at high speed.
Yes, that's propably what's happening, thanx. It usually occurs after a bit of racing.

#13 Sariel

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Posted 08 July 2010 - 12:49 PM

View PostJurgen Krooshoop, on 08 July 2010 - 10:09 AM, said:

Yes, that's propably what's happening, thanx. It usually occurs after a bit of racing.

Try adding some slight gear reduction between the motors and wheels if you can. It protects motors from being forced to rotate when they are stopped, which is the basic reason for overheating.
With great power comes great electricity bill.

My hamster-powered creations at: Sariel.pl | Brickshelf | YouTube | Facebook

#14 Jurgen Krooshoop

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Posted 08 July 2010 - 09:01 PM

View PostSariel, on 08 July 2010 - 12:49 PM, said:

Try adding some slight gear reduction between the motors and wheels if you can. It protects motors from being forced to rotate when they are stopped, which is the basic reason for overheating.
It already has 2:1 gear reduction applied to the outer (slower) axlehole. And I actually don't want to add more gear-reduction, to keep the car fast and the drivetrain simple.



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