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Search: Posts Made By: howardcano
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09-10-2018, 01:41 PM
Replies: 46,835
Views: 4,710,171
Posted By howardcano

Yes, for a double-wishbone suspension, not a...

Yes, for a double-wishbone suspension, not a MacPherson strut.

Here's something to ponder in your diagram, if it applies to a MacPherson strut: Why did you draw the lower line horizontal?
09-10-2018, 01:06 PM
Replies: 46,835
Views: 4,710,171
Posted By howardcano

It's correct, except that the kingpin length can...

It's correct, except that the kingpin length can change by sliding through the lower pivot ball, and the location of the tire contact patch relative to the lower arm can change... which makes it...
09-10-2018, 10:36 AM
Replies: 46,835
Views: 4,710,171
Posted By howardcano

I enjoyed the extra details you included!

I enjoyed the extra details you included!
09-10-2018, 10:13 AM
Replies: 46,835
Views: 4,710,171
Posted By howardcano

Your diagram is correct for a suspension with...

Your diagram is correct for a suspension with pivoting upper and lower arms (the traditional "double wishbone" suspension). For an inverted MacPherson strut as used on most 12th scale cars, the...
09-08-2018, 04:22 PM
Replies: 58
Views: 2,860
Posted By howardcano

The Hello Kitty stickers are worth at least 0.2...

The Hello Kitty stickers are worth at least 0.2 seconds per lap. I never race without them!
09-08-2018, 09:06 AM
Replies: 58
Views: 2,860
Posted By howardcano

Go, Porsha, go!!!

Go, Porsha, go!!!
09-06-2018, 11:30 AM
Replies: 7,775
Views: 1,097,894
Posted By howardcano

I'm not seeing any resistance numbers on this...

I'm not seeing any resistance numbers on this list. There is, however, a column for inductance.
08-03-2018, 07:58 AM
Replies: 277
Views: 37,790
Posted By howardcano

This calculator is probably for a steady-state,...

This calculator is probably for a steady-state, sinusoidal signal. The drive from the microprocessor is neither-- it's a square wave with occasional swapped phase. You need to verify for transient...
06-27-2018, 09:27 AM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

Wow, that's quite a list! Unfortunately,...

Wow, that's quite a list!

Unfortunately, many beginners read about these things, or see them being used, and assume they are necessary. For 99.9% of us, they are not.

I have never used a setup...
06-21-2018, 04:21 AM
Replies: 277
Views: 37,790
Posted By howardcano

Fewer turns (or a smaller size with the same...

Fewer turns (or a smaller size with the same number of turns) on the inductor requires more current to generate the same signal level. (It also reduces the Q of the tank.) The devices driving the...
06-15-2018, 12:52 PM
Replies: 481
Views: 34,768
Posted By howardcano

Here's one method: All chargers and batteries...

Here's one method: All chargers and batteries being used for an upcoming race go on a table (or tables) in the tech area. One or more tech inspectors verify that the maximum charge rate is observed....
06-12-2018, 04:13 AM
Replies: 277
Views: 37,790
Posted By howardcano

The jumper positions for the loop amplifier are...

The jumper positions for the loop amplifier are listed here:
https://www.rctech.net/forum/showpost.php?p=12222187&postcount=251
Ceramic capacitors will work fine.
06-11-2018, 02:17 PM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

We've done both on asphalt. The rolling...

We've done both on asphalt.

The rolling starts (for a class using many of the USVTA rules, but with NASTruck bodies) were a kick, and helped prevent pile-ups in the first corner, since a bad start...
06-10-2018, 04:42 AM
Replies: 8
Views: 388
Posted By howardcano

They don't tire out. When they go bad, it's...

They don't tire out. When they go bad, it's nearly always catastrophic.

The problem is almost guaranteed to be something else, just as RC Guy originally said.

FETs don't get "tired".
06-04-2018, 05:22 AM
Replies: 166
Views: 21,749
Posted By howardcano

These lap counting systems use frequencies many...

These lap counting systems use frequencies many orders of magnitude lower than Bluetooth. That's because the reception of the transponder signal is intentionally done in the near field, via...
06-01-2018, 04:31 PM
Replies: 21
Views: 1,799
Posted By howardcano

For ESCs that can have their software changed-...

For ESCs that can have their software changed- which is almost all of them these days- ROAR approves a software version for the ESC. The video states at 1:56 that the version being described is...
06-01-2018, 09:58 AM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

They will rarely be equal, but within a few...

They will rarely be equal, but within a few degrees is good. 7 versus 23 is horrible.
05-30-2018, 09:31 AM
Replies: 119
Views: 24,021
Posted By howardcano

That would explain the two out-of-box failures I...

That would explain the two out-of-box failures I had. But then there's also the one I bought used, and it's on its third year of use.
05-23-2018, 12:31 PM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

Considering that ROAR rules specify a minimum...

Considering that ROAR rules specify a minimum terminal resistance of 101 milliohms at 25C for 25.5T motors, you have either a bunch of naughty motors, or your MMS is very inaccurate. I suspect the...
05-19-2018, 06:31 PM
Replies: 2
Views: 223
Posted By howardcano

That would require re-binding of the receiver to...

That would require re-binding of the receiver to the transmitter whenever the model was changed. It would be easier to just adjust the throttle travel.
05-15-2018, 12:03 PM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

It would be cool if the VXL version were belted!

It would be cool if the VXL version were belted!
05-14-2018, 05:15 PM
Replies: 34
Views: 1,847
Posted By howardcano

Will you need a heat sink, or is this just to...

Will you need a heat sink, or is this just to handle higher-current peaks?
05-14-2018, 05:07 PM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

Can you provide a part number or link?

Can you provide a part number or link?
05-10-2018, 05:16 AM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

Do what makes you happy. However, more of a...

Do what makes you happy. However, more of a quantity that is unknown is still unknown. Regardless of timing setting, current draw, and RPM, there is no way to know if the torque of one motor is...
05-09-2018, 03:55 PM
Replies: 12,455
Views: 1,319,900
Posted By howardcano

There is insufficient information to make that...

There is insufficient information to make that determination. Torque measurements are also required, just like Old Dude said.
Showing results 1 to 25 of 500
 


 
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