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BrianG · 06.14.2012, 12:15 PM

1: Yes, ANY switching BEC can fail like you describe, although it happens more if you are pulling larger currents which stresses it more. A receiver pack is obviously better in this regard, but is just one more thing to charge up, and I would personally use a 2s LiFE pack instead for flatter discharge curve and higher capacity.

To use an external receiver power source, you'd simply remove the red wire from the ESC's throttle cable. This will keep the ESC's BEC from powering the servo/receiver.

2: No matter how you arrange it (1x6s, 2x3s, 3x2s, etc), a 6s pack will have the same amount of spark. And whatever connector type you use, the spark will happen on the last connection you make.

3: According to Patrick (Castle pres) the Traxxas 1717 has slight design changes for faster spool up and higher efficiency at higher currents. Kinda makes sense in an on-road vehicle that is geared stupid high.

4: By "extreme MMM", do you mean the MMM included with the Traxxas XO-1 or the one for 5th scale? The XO-1 ESC has two main differences: has the speed lock-out firmware which requires the iDevice to unlock and has an additional capacitor bank. Personally, I would just use a regular MMM and add some capacitors to the power leads.

5: Not sure really but the 1717 does have a slightly higher continuous power rating. Either motor would probably work well.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	06.14.2012, 12:15 PM 1: Yes, ANY switching BEC can fail like you describe, although it happens more if you are pulling larger currents which stresses it more. A receiver pack is obviously better in this regard, but is just one more thing to charge up, and I would personally use a 2s LiFE pack instead for flatter discharge curve and higher capacity. To use an external receiver power source, you'd simply remove the red wire from the ESC's throttle cable. This will keep the ESC's BEC from powering the servo/receiver. 2: No matter how you arrange it (1x6s, 2x3s, 3x2s, etc), a 6s pack will have the same amount of spark. And whatever connector type you use, the spark will happen on the last connection you make. 3: According to Patrick (Castle pres) the Traxxas 1717 has slight design changes for faster spool up and higher efficiency at higher currents. Kinda makes sense in an on-road vehicle that is geared stupid high. 4: By "extreme MMM", do you mean the MMM included with the Traxxas XO-1 or the one for 5th scale? The XO-1 ESC has two main differences: has the speed lock-out firmware which requires the iDevice to unlock and has an additional capacitor bank. Personally, I would just use a regular MMM and add some capacitors to the power leads. 5: Not sure really but the 1717 does have a slightly higher continuous power rating. Either motor would probably work well.