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MetalMan
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Too Fast - 12.10.2007, 04:37 PM

Yes, there is such a thing. A RC car/truck is too fast when it creates more lift than it has downforce.

For the MT2, that point seems to be reached at ~65mph (guess). I was doing 10s1p runs with the body on, and the warmer weather/hotter asphault compared to last night helped a lot with keeping the truck more stable. Fewer cars on my street also helped.

I was increasing speed with each pass, to get the feel of how the throttle should be worked. Then one pass, the truck lifted off! And it wasn't due to a blip of the throttle, or an imperfection of the pavement, because the back end lifted off. I'd say the truck got a good two feet into the air before coming back down to the ground, and tumbling. The only noticeable damage was a broken rear ball end and a ripped from bumper. And of course both the 10s pack and the receiver pack were ejectected, despite the good strength of the industrial strength Velcro.

Now I need to work on downforce...


SH Z-Car, Custom Crawler, 8s Savage, 12s XTM XLB 1/7 buggy, 4wd 4-link rear/IFS Pro4 truck, Custom Hyper 10 Short Course, Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz
   
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lincpimp
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12.10.2007, 04:53 PM

If you want a really high down force body, try out the lola style bodies from proline. The 1/8 scale size would most likely work on your truck, and cover up the wheels for better aerodynamics.
   
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sikeston34m
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12.10.2007, 07:17 PM

Quote:
Originally Posted by MetalMan View Post
Yes, there is such a thing. A RC car/truck is too fast when it creates more lift than it has downforce.

For the MT2, that point seems to be reached at ~65mph (guess). I was doing 10s1p runs with the body on, and the warmer weather/hotter asphault compared to last night helped a lot with keeping the truck more stable. Fewer cars on my street also helped.

I was increasing speed with each pass, to get the feel of how the throttle should be worked. Then one pass, the truck lifted off! And it wasn't due to a blip of the throttle, or an imperfection of the pavement, because the back end lifted off. I'd say the truck got a good two feet into the air before coming back down to the ground, and tumbling. The only noticeable damage was a broken rear ball end and a ripped from bumper. And of course both the 10s pack and the receiver pack were ejectected, despite the good strength of the industrial strength Velcro.

Now I need to work on downforce...


Better tell that Motor it's in a truck, Not an Airplane!
   
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