Re: (ET) E20 info

[David C Robie <mycroftxx1 juno com>]

Jerry, you ought to leave that PTO and lift  in there.  U might want to
mow with her some day.  

You want the widest wheels and tires set inside out so they are wider
track.  You can't 'spin pull'  in a lawn tractor like the biggie hot
rodded up ones do, not enough power.  Also, you want a real decent low
internal resistance  battery pack and welding cable jumpers for highest E
and current available to the motor armature.   I'm partial to Trojan
105's and always wanted to see what one of mine would do with new ones in
it.

Check the class you will be running in as to their reqirements.  If you
strip her too much the may have you in a different class.

As to schematic, am not a 20 guy (just scrapped one) so can't help you
much.   BUT - leave that RTN relay ckt in as that is what makes her safe,
brake switch and everything run through it. 

Will you be pulling at Swamp Yankee?  If so, say Hi to Al Mitchell, a
puller down there from Dave the 'little steam'  guy in the Cranberry
Flywheelers.

Dave
Weymouth MA



On Wed, 26 Jul 2006 22:24:26 -0400 "Jerry Rhodes" <jerry38 alltel net>
writes:
> OK before I start this, I need to know if I'm reading the schematic 
> right. 1st I'm building a E20 puller, an I am stripping the control 
> circuit down to the bear bones, no PTO, no RTNs, no CC, etc... I'm 
> looking at a schematic for an E20 DA when I hit the foot feed the 
> start swt brings in 1F an 2F, I now have power to the motor a A1 an 
> S2 thru R1, R2, R3, wire #8(or #24) feeds a diode to wire #62 to 
> Field F1..F2 draws from R4, wire #37, FW2, wire #22 a complete 
> circuit ( so far so good?)...so I want the field strong? with only 
> one resistor in the line and as I go up in speed ( 1A, then 2A, then 
> 3A, I still only have R4 in line if I go on up in speed I add R 5, R 
> 6, R 7 for a weak field? 
> 
> All safeties will be in the line ...ie key swt, seat swt, brake swt, 
> CB 3 will be replaced by a deadman swt ( which will also be in wire 
> #15) ..diodes will be added for feedback control..
> 
> So am I way out in left field...it looks ok on paper...an it looks 
> to work with the testing I've done on a mockup board..
> I'm open to all input you got..thanks in  advance
> 
> it will only be running hard for about 90 sec
> 
> Jerry NW Ohio