Begin forwarded message: Date: December 21, 2009 7:02:25 PM EST Subject: Re: (ET) Snow's over, E20 is tired...
I use the dozer blade. For years I just put chains on the turf tires and my E12 moved snow with no complaint. Then I got a paver driveway and to be safe, ditched the chains but switched to Ag tires and added 160 lbs aft of the drive wheels (an old Marcy weight set) and swapped the E12 drive motor with an E20. Really no complaint but my drive is flat...if there was wheel spin I'd be looking for a 2317 limited slip trans.
Maybe the question is can our 2318 transaxles be upgraded to limited slip?
Jack On Dec 21, 2009, at 4:45 PM, g k wrote: i think the weightbox has a substantial influence. also if you could go up the hill in forward gear, you'd also gain some traction. good luck, jon k albany ny
On Mon, Dec 21, 2009 at 12:39 PM, Graham Allan <allan physics umn edu> wrote: So what would you say is the major factor in not getting stuck? Weight? I've tried either blowing or plowing my driveway with my E15 with dismal results. The driveway is probably around 30 degrees, downwards from the house, and when it comes time to reverse back up the hill one wheel will simply lose traction and spin. So I have given up for now (knowing mainly, I am missing something critical). I've had chains on the drive wheels but no extra weight, which is probably a big mis-step given the huge weight of blower or plow blade up front. But I was never convinced that weight alone would make the difference, given the open differential... hopefully I'm wrong on that?
How much do you have in the weight box (besides the additional 120 lbs of lead)?
Graham
On 12/20/2009 12:07 PM, Christopher Zach wrote:
Well, the snow is over. 20 inches, wet and heavy here in Relay.
Shoveling it would be very un-fun.
I'm glad I did some blowing yesterday during the storm, enough to make a
single-width path and turn-around up the driveway when it was about a
foot. Because blowing a full 20 inches of snow is tough. Easier to do
about 3/4 of a blower-width at a time when charging up the hill in L.
Putting the weight box plus 120 pounds of lead stops the wheel skipping
problem. The tractor can now blow up the 40 degree driveway in L and
keep it's chute full. Go too slow or too little snow and it can clog.
Today I widened the scope to the whole driveway. I also hooked up the
E-Meter to one half of one string to get it working again (since the
DC-DC exploded probably due to voltage spikes from the dead varistor).
When going full blast into a 20 inch pile of snow each string is pulling
200a. So the whole tractor+snowblower can pull a peak of 400 amps from
the pack.
I wonder at what point the wiring in the tractor will start to become a
factor.
This also explains why I need a >60ah pack. However the fact that these
30ah cells can put out 7C in 32 degree weather is pretty nice. I like them.
Right now the pack is on charge. When I looked a few minutes after
starting it was going at 10a per string (10.5/9.5) for a total charge
rate of 20a. So in 3 hours or so the pack should be full and I can
complete the top of the driveway (which includes the slush/snow from the
street plows). Then maybe I'll trundle over to the neighbors.
But overall I'd say tractor+blower+chains+weight box+120 pounds=will not
get stuck.
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