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Which size 80cc single or 100cc twin

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80cc class single cyl plane
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Which size 80cc single or 100cc twin

Old 11-26-2007, 11:18 PM
  #1  
sevans16
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Default Which size 80cc single or 100cc twin

I am tryng to decide if the extra money is worth spending on a twin. I am looking at most DA engines. I have been told that the 85 has more torque than the 100 twin. Planes seem to be pretty close in numbers. So what do experienced pilots have to sa?
Old 11-26-2007, 11:24 PM
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krayzc-RCU
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Default RE: Which size 80cc single or 100cc twin

jump on the flying g iants.com rctom from Wildhare Aircraft has did a comparison of the 100 and 85 both being DA. its in the engine section there

http://www.flyin ggian ts.com/forums/

my vote went to the DA-85 jams on a 26A at 6900 and 6600 on a 27A vess on a JTec muffler...
Old 11-26-2007, 11:29 PM
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smarks
 
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Default RE: Which size 80cc single or 100cc twin

So what was Tom's verdict? I'm too lazy to go look.
Old 11-26-2007, 11:43 PM
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Default RE: Which size 80cc single or 100cc twin

the 85 is about 100 rpm lower than the 100 and the 85 is about 1.5 lbs lighter.

there are many pages of info but here is a quote:

"I have pretty much decided that any plane will perform better with the 85 than with the 100 due to the almost identical power and the lighter weight of the 85.

TF"

http://www.flyin ggia nts.c om/forums/fg68/17798-da-85-actual-field-results-17.html

take out the spaces and cut and paste the above

by the way i have the DA-85 on a H-9 Cap at 21.5 lbs yes yes its sweet times are changing with technology
Old 11-27-2007, 12:08 AM
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Default RE: Which size 80cc single or 100cc twin

Yes, the 85 is a sweet motor. Although I thought it was reported that the 85 needs to be piped to keep up with the 100...
Old 11-27-2007, 11:41 AM
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Default RE: Which size 80cc single or 100cc twin

I think that there's a lot to be said about twins, even with the higher weight. The twins are much easier on the airframe for vibration. I spent some time thinking about this same question and decided on the DA100. Have one on the bench waiting for my Ultimate to be done!
Old 11-27-2007, 11:48 AM
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Default RE: Which size 80cc single or 100cc twin

Check out the 85 for vibration 1st to see for yourself prior to speaking on that deal remember technology is changing the same way oil, servos and such have evolved. The DA is very smooth...
Old 11-27-2007, 12:27 PM
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Default RE: Which size 80cc single or 100cc twin



You might want to hold a little longer until they figure out all the issues with the DA-85. I just saw they recalled for modification the first 340 engines.

I was looking for something in the same weight range and ended up with a BME Extreme 110. Same weight as the DA-85 and quite a lot more power. Likely a bit more complex to mount and operate, but swings a 28x10 very fast...
Old 11-27-2007, 06:33 PM
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yakman
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Default RE: Which size 80cc single or 100cc twin

The hub issue has been fixed.

I have gone the 85cc single route. If there is only 100rpm between the two motors I believe I made the right choice.
Old 11-27-2007, 06:54 PM
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Default RE: Which size 80cc single or 100cc twin

Seeing this 85 in action is an eye opener. I first saw it at Joe Nall and I did not have a need for that motor until I saw it take off and go straight up for a few footballs fields. I then said I need to find me a plane for this deal.....

power to weight ratio the DA-85 has me looking for 33-35% planes to run more in my future and do away with 50cc, 150cc/111cc birds....
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Old 11-28-2007, 11:45 PM
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h82crash
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Default RE: Which size 80cc single or 100cc twin

If money is no object the 100 is smooth. But, the engine costs more, the mufflers/canister sys is literally twice as much. I think the addition cost ($600) is only buying a little less vibration and a lot of cool factor.
Old 11-28-2007, 11:48 PM
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Default RE: Which size 80cc single or 100cc twin

h82crash
u can best belive most already know the route they are going to take and even if its not correct later on it life it may never be known hereits thier $$ all you or I (anyone) can do is tell what we know and the facts will help a person make the best informed move......

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