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Something old and new


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#1 havlicek

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Posted 16 November 2017 - 07:02 AM

     Recently I got contacted about building a drag motor just like my recent "Something Old" build.  Well, considering that motor has my last set of 36D Arcos and one of the very few Champion 36D end bells I've ever had, building something just like that wasn't going to be easy, make that...it would be all-but-impossible.  My solution was simple, just build and wind another arm for the motor.  The #28 I had originally wound for it will drop right into any FT36D and is much more appropriate for a typical hot FT36D rewind.  The arm requested for this motor is *strictly* drag motor..."just under 20T/#24awg".  :)  Sooo, to me, "just under 20T" means (scribble scribble, carry the 1, multiply times the square root of the sum of the distance to the moon, and add the Finklestein constant)...19 turns of #24awg.

IMG_2312.JPG

IMG_2311.JPG

Those drag guys are so much fun!


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John Havlicek




#2 Racer36

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Posted 16 November 2017 - 07:42 AM

19 turns of 24????? That should dim the lights!


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Dennis Dominey

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#3 Samiam

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Posted 16 November 2017 - 07:57 AM

              :bomb:

Monica would be proud. :D


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Sam Levitch
 
"If you have integrity, nothing else matters, and if you do not have integrity, nothing else matters."
     Robert Mueller, special counsel (2013)

#4 havlicek

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Posted 16 November 2017 - 08:19 AM

19 turns of 24????? That should dim the lights!

 

...and not just in Fresno Dennis!  He also is sending me a neo setup FT36D that he wants me to go really crazy with...like this one ain't crazy?

Anywho, I think I'll add shunts and some spring insulation to this thing because that split-second current draw when the trigger gets pulled is likely to be pretty epic.  I just hope the drivers are situated behind a blast shield at his drag strip.


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#5 Racer36

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Posted 16 November 2017 - 08:29 AM

Some cable sized shunts are a good idea. I can see brush springs glowing in the dark otherwise!


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Dennis Dominey

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#6 havlicek

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Posted 16 November 2017 - 08:33 AM

yeah Dennis.  Even for just the very short blip of a drag race, it's gonna need a buncha current.  Actually, that's when all motors need the most current!


John Havlicek

#7 Eddie Fleming

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Posted 16 November 2017 - 08:45 AM

I like your math. Most folks can't do that.


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Eddie Fleming

#8 havlicek

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Posted 16 November 2017 - 08:46 AM

I like your math. Most folks can't do that.

 

 

Well, in all honesty Eddie, ciphering wasn't my strong suit in school.  :D


John Havlicek

#9 havlicek

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Posted 01 December 2017 - 05:29 PM

Okey dokey.  I got back the arm from balancing (*razor blades weren't going to do for this ...er...thing), and did a careful assembly of this motor.  Shunt's, insulated springs and heavy lead wires were a no-brainer here.  Well, as I expected for NINETEEN TURNS OF #24awg, I could only fire-up this motor for around a second or so, and it would trip the circuit breaker on my power supply.  :D  For those short blasts at low voltage, it sounded positively frightening...DUH!  All I can say is, I hope the drag strip where this thing will be run has a lot of amps on hand, because this motor will definitely need all it can get.

IMG_2343.JPG IMG_2344.JPG


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John Havlicek

#10 SlotStox#53

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Posted 01 December 2017 - 11:18 PM

I know the strip runs 14.7 volts and I seem to remember 70-80amps mentioned. So "should be" ok for this one :D
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#11 Geary Carrier

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Posted 01 December 2017 - 11:41 PM

Hi John,

 

A mean machine, par excellence...

 

Do you typically run your 36D motors clockwise when viewed from the can side?

 

Did you add a bit of extra timing for the larger comm?

 

 

Thanks,

g


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Yes, to be sure, this is it...


#12 Tom Katsanis

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Posted 02 December 2017 - 03:03 AM

Thanks John the motor looks nice & scary like Paul said there should be enough amps on the track.
Tom
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#13 havlicek

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Posted 02 December 2017 - 05:57 AM

Hi John,

 

A mean machine, par excellence...

 

Do you typically run your 36D motors clockwise when viewed from the can side?

 

Did you add a bit of extra timing for the larger comm?

 

 

Thanks,

g

 

Hi Geary,

     99% of the motors I do are CCW timed (as viewed from the end bell).  Once in a while I get a request to do one CW for an older setup, but that's rare.  In an inline of course, it doesn't matter because you can always flip the crown gear.  The timing here is in the 15-20 degrees ballpark.

 

Thanks John the motor looks nice & scary like Paul said there should be enough amps on the track.
Tom

 

     I'll take your word for it Tom :)  To me, this motor is way-radical...even for a drag motor!


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John Havlicek

#14 Tom Katsanis

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Posted 02 December 2017 - 07:39 AM

Yes it is quite radical I look forward to seeing how crazy the neo one will be.
Tom
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#15 havlicek

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Posted 02 December 2017 - 08:24 AM

Yes it is quite radical I look forward to seeing how crazy the neo one will be.
Tom

 

Yikes!


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John Havlicek





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