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  1. #1

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    Sig astro hog motor choice

    Hello,
    I am getting back into the hobby and I am looking to build a sig astro hog for the winter. I am looking at putting an Asp 4 stroke on it and I am not sure how they stack up against O.S. as far as power goes. I am looking at the .91 and the 1.20 I wan to have plenty of power when needed. I was looking at the kit and it is showing 7 to 7.5 lbs which is close to the 4 star 60 I had with an O.S. .91 on it and at times I wanted a little more power on it.

  2. #2

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    I had a K&B .65 in mine and always had plenty of power.


    carl

  3. #3
    mscic-RCU's Avatar
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    fly mine electric
    Takeoffs are optional, landings are mandatory
    Sig Brotherhood #131

  4. #4
    Zor's Avatar
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    Last edited by Zor; 10-16-2014 at 04:07 PM. Reason: Corrected hae to have

  5. #5

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    I have looked at electric, but the only experience I have with electric is a park zone t-28 (which has failed to impress me) I am building a sig 4 star 20 ep. I may wait and see how it does and look into making the hog electric also.

  6. #6

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    A 70 four stroke would be plenty of power. I flew this aircraft with that size/type engine and there is plenty of reserve power. A 91 or 120 would be much more engine power than needed.
    I know nothing about Asp engines, have always used OS engines.
    Jerry

  7. #7
    mscic-RCU's Avatar
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    Quote Originally Posted by Kraydune View Post
    I have looked at electric, but the only experience I have with electric is a park zone t-28 (which has failed to impress me) I am building a sig 4 star 20 ep. I may wait and see how it does and look into making the hog electric also.
    Powered with Tacon 60, 80 amp ESC, 6 cell pack
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    Takeoffs are optional, landings are mandatory
    Sig Brotherhood #131

  8. #8

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    I got an older Sig Astro Hog from a friend who moved to South Carolina a couple years ago. It had a KB .61 2 stroke in it. I converted to an O.S. 70 Surpass. If I were using a Magnum, or ASP in some places, 4 stroke, I would have no problem using their .70 4 stroke as it is basically identical to the O. S. engine. If you wanted a bit more power, then go with the .91 4 stroke but putting the 1.20 on a 7 - 8 pound plane with as much wing area as the Astro Hog has would be major over power.
    J F Sohm - AMA# 192350 - IMAA# 15145
    If you're not catching any flak, you're not over the target.

  9. #9

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    Thanks for all the replies, I will probably go with the asp .91 4 stroke as I like the sound of the four strokes.

  10. #10

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    Hay Kraydune,
    I installed a K&B .61 and it flew my model just fine. Lots of power for the airframe and a very reliable engine for me. I do fly at sea level and I do not over power my models...but fly them on a wing. Its a great flying model, relaxing and forgiving in the air.
    Soft Landings Always,
    Bobby of Maui
    AMA 15016
    Hellcat Brotherhood #21
    P-38 Brotherhood #51
    Say what you mean, mean what you say...and !#$& it if you can\'\'t take a joke.

  11. #11
    I have an astro hog for 20 years with a Saito 91. P
    save yourself some frustration and do not mount landing gear in wings. after too many nose overs, I mounted gear on fuse just in front of wings, problem solved.

  12. #12
    TomCrump's Avatar
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    Quote Originally Posted by Kraydune View Post
    Thanks for all the replies, I will probably go with the asp .91 4 stroke as I like the sound of the four strokes.
    I had one in my Kadet Sport, and really enjoyed it.

    The engine really started to come into it's own, after 1.5 gallons of fuel.

    The ASP/Magnum .91 four stroke would be my choice to power an Astro Hog.
    Tom C

    Sig Brotherhood # 120

  13. #13
    Zor's Avatar
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    In "The Good Old Times"

    Quote Originally Posted by TomCrump View Post

    I had one in my Kadet Sport, and really enjoyed it.

    The engine really started to come into it's own, after 1.5 gallons of fuel.

    The ASP/Magnum .91 four stroke would be my choice to power an Astro Hog.
    TomCrump,

    You may have noticed that I do not disagree with you.
    However you remind me of the early days when the Astro Hog was powered with a K&B 45 and the radios were using reed relays receivers with audio tones modulation.

    I do not know if you might remember that.

    Zor

  14. #14
    TomCrump's Avatar
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    That's right. You don't know what I remember.
    Tom C

    Sig Brotherhood # 120

  15. #15

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    Quote Originally Posted by mscic-RCU View Post
    Powered with Tacon 60, 80 amp ESC, 6 cell pack
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    I like that finish! Bet it shows up great. My first plane was an Andrews H-Ray that I finished like that but with the cocarde markings (blue circle, white star with red center circle) on the wing. Liked it so much, when I got back into it after time in the Air Force, I did that finish on my second plane, a Goldberg Falcon 56. Nice job.
    J F Sohm - AMA# 192350 - IMAA# 15145
    If you're not catching any flak, you're not over the target.


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