what do you think about the 42" standers?

Discussion in 'Lawn Mowing' started by TClawn, Nov 22, 2005.

  1. TClawn

    TClawn LawnSite Silver Member
    Messages: 2,036

    I am interested in a 42" stander,and have a couple questions:

    what do you think of it?

    is the blade speed too slow?

    does it bog easy?

    overall, has it been a good mower?

    is there a problem with the 2 21" blades?

    thanks. chris.
  2. Jpocket

    Jpocket LawnSite Silver Member
    Messages: 2,281

    I would like to have a 61" stander.
  3. TClawn

    TClawn LawnSite Silver Member
    Messages: 2,036

    really? that sounds a bit big for a fixed deck, I would consider the sentar, unless you want to go with JD.
  4. Envy Lawn Service

    Envy Lawn Service LawnSite Fanatic
    Messages: 11,087

    No, there wouldn't be a problem with blade tip speed due to it being a 2-blade 42" deck.

    Other factors would have to be present in deck gearing to slow the tip speed.
    It should have just as much tip speed as a 60" class mower.
    Same thing, one less blade.

    Now, with that said, no it should not bog easy with ample horsepower.

    To be honest with you, I have played with these theories a lot in the field.
    Turns out the decks with shorter blades seem actually tend to bog easier.
    This is because the shorter the blade, the higher required gearing to attain the same BTS.

    For instance, a 3 blade 48" deck seems to pull down much easier than a 2 blade 42"
  5. TClawn

    TClawn LawnSite Silver Member
    Messages: 2,036

    envy, I would say that you notice it does not bog as much, because there is a lot more leverage put out at the tip of the blade, and a lot more mass behind it.

    but, you get a lot more rpms, which is what really counts, not tip speed. afterall, you can have a 19,000fpm tip speed, but if the blade is so large that it only does 1 rpm, it is not going to cut very much grass.

    I have noticed with my quick 36, that if you have a very over grown patch, it will bog the blades down for about a second, then they will quickly regain their speed, due to the small length, which gives them faster acceleration. if I go through such growth with my exmark, it has two catagories, 1. it kills the engine. 2. the momentum carrys it through, but it comes back up to speed slower.

    overall, I would say that for mulching, a medium width blade is best. when the blade is too small, it gets so many rpms going that it makes the clippings dust, and then if it is wet, they make turds. but I think that the small blades are exellent for discharge and leaves. it really chops them up fine.
  6. Envy Lawn Service

    Envy Lawn Service LawnSite Fanatic
    Messages: 11,087


    Yeah, this can become a pretty deep subject matter. Probably deeper than I should attempt to discuss very much at this time of night.

    Anyways, it's a funny thing, which can also all be very relevant to setups, actuals and the relative actual equations that go along with them. But, just generally speaking, if for example you take the following in comparison...

    3-Blade 36"
    2-Blade 42"
    3-Blade 52"
    3-Blade 60"

    If all 4 start with the same size drive pulley and a similar HP to Deck Size ratio, here is what I believe you would find...

    To begin with I think you would find that what you find to be true about the Quick 36 is because it's cutting width, length of blade and spinning mass cause it to fall outside of the drag window you get into with a 3 blade 48"

    On the other hand, I believe you would find the other decks to be fairly comparable. This is because the spindle pulley size would be the same on the 42" and 60" and only slightly smaller on the 52" to attain the same tip speed.

    More could be said... but yippie... I'm sleepy~

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