Approximate speed of my trucks?

[RCDad]

I have pictures of my pede and mayhem in my office at work. I'd like to display the specs next to them. Anyone know what a good approximate speed would be for my pede with the SS5800 BL system and my Mayhem with the .26 engine?

[DAVEC-NITRO-RS4]

Stop-watch them across a measured distance, like 100' marked off in the street or lot, and then do the math to convert feet/sec into miles/hour.

[Mr. Tune]

Which .26 motor is in the mayhem? What spur gear/clutch bell combo does it have?

[RCDad]

I have no idea on the Mayhem. Others with a similar pede have said 35+ which sounds about right. On the Mayhem it's probably 40-45.

[thenewguy821]

I believe the gearing is 13/42 with a Mach .26 on the Mayhem, but I may be off.

[RCDad]

I'm going to guess at 45 mph.

[ATA_Thrash]

I know my Mayhem came with a 15 tooth clutch bell.

[thenewguy821]

It may be a 15 on there then, it is the stock bell.

[DAVEC-NITRO-RS4]

RCdad,

Here are some quick charts laid out for stopwatch checking of trap speeds. You need a lot of room to get up to speed and then hit your marks, but if you are good on the watch buttons, you should come close enough. The longer you can make your trap, the more accurate your speeds will be.

dist time fps mph
90 1.00 90.00 61.36
90 1.20 75.00 51.14
90 1.30 69.23 47.20
90 1.40 64.29 43.83
90 1.50 60.00 40.91
90 1.60 56.25 38.35
90 1.70 52.94 36.10
90 1.80 50.00 34.09
90 1.90 47.37 32.30
90 2.00 45.00 30.68

dist time fps mph
130 1.50 86.67 59.09
130 1.60 81.25 55.40
130 1.70 76.47 52.14
130 1.80 72.22 49.24
130 1.90 68.42 46.65
130 2.00 65.00 44.32
130 2.10 61.90 42.21
130 2.20 59.09 40.29
130 2.30 56.52 38.54
130 2.40 54.17 36.93
130 2.50 52.00 35.45

Here's the Excel formula I used to figure this:

=1/((5280/fps)/3600)

[ATA_Thrash]

15 is stock on the mayhem.