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Blowers..what's more important?

Discussion in 'Lawn Mowing' started by GFTC, Nov 3, 2004.

  1. GFTC

    GFTC LawnSite Member
    Posts: 104

    What' s more important? Volume or air speed.
     
  2. impactlandscaping

    impactlandscaping LawnSite Silver Member
    Posts: 2,332

    Volume..if you are blowing at 200mph, but only 300 cfms, you'll get nowhere fast. Put some more volume behind it, and watch the leaves and bricks fly!!
     
  3. sniggly

    sniggly LawnSite Member
    Posts: 190

    ......and Lot's of it!!!!!!!!!....

    Redmax 8000.......I replaced a Tanaka with it......shouldadunitsooner!
     
  4. Sam-Ohio

    Sam-Ohio LawnSite Senior Member
    from Ohio
    Posts: 304

    Both factors are important. The best way to compare blowers is to multiply the air volume times the air speed. The number that you get represents the total energy out put of the machine. It also makes it very easy to understand the real difference between the machines.

    for example :

    Stihl BR 340 blows at 161 mph and 488 cfm = 78568

    Stihl BR 420 blows at 172 mph and 518 cfm = 89096

    Echo PB 751 blows at 205 mph and 620 cfm = 127,100

    It is very difficult to understand the difference in energy output between these blowers if you try to compare the separate numbers, but by turning it into one grand total number, the power output difference jumps right into focus.

    Also, when you look up the speed and volume rates, make sure they have been measured at the END of the blower tube. Some manufacturers have been known to rate their blowers at the fan HOUSING exit. This of course is a totally bogus figure since it would be impossible to use a blower with no tubes on it. It's just a way to make a false impression of power from their machines and is really a type of false advertising.
     
  5. Runner

    Runner LawnSite Fanatic
    Posts: 13,496

    Great post above. This is like the large push blowers...they don't blow NEARLY as fast as the backpacks do.
     
  6. impactlandscaping

    impactlandscaping LawnSite Silver Member
    Posts: 2,332

    I agree. Good post , Sam. Dealer??

    edit: Never mind, just looked at your profile!! Nice to get input from a servicing dealer!!
     

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