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DA100 or DA85 in Aviationmodels Yak 35%

Old 12-26-2008, 06:59 AM
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Default DA100 or DA85 in Aviationmodels Yak 35%

I have bougt a Aviation models Yak 35% and have not decide which engine!
Its the old version of DA100. I have both the engines so no other options then DA100 with canisters or DA85 with canister, what you think?

Happy new year!
Old 12-26-2008, 08:15 AM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

100 on cannisters,,, 85 would need a pipe. This is a BIG 35%er !!
Old 12-26-2008, 08:02 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

The 100 is one sweet engine. [8D]
Old 12-26-2008, 08:06 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I have a DA85 on a Lanier 94" Extra......The 85 is more than enough for the Extra
Old 12-26-2008, 08:08 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

i agree with the two guys above...in "this" aircraft , a DA-100 would be the better choice of the two. The 85cc motor is good i think for up to about 25-26lbs , but for really good 3D type flying 22-24 lbs. I know they say the 85 has dang near the same RPM's as the 100....but the 100 is going to produce a little more torque i believe , and this bird is supposed to come in around 28-30lbs.,......it IS a big 35% , At 107". If you we're to go with a smaller type bird like a 102'104" around the 23-24lbs , then i'd go with the 85 to keep the weight down even more.
Old 12-27-2008, 02:23 AM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I'm flying a SD-35% Yak with a DA-100 on cannisters and it's perfect. I have two buddies that were flying 33% planes, one Extra and one Sukoi, with the DA-85 and they both had problems with the 85 beating it's self to death. Several trips back to DA for repairs for each engine. Power was never the problem, that engine may have has much power as a 100, but from what I've seen they are hard on themselves. My DA-100 is the older heavier model.
Old 12-27-2008, 08:55 AM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I have heard that before from several other people having problems with the 85. I always get slammed when I tell people about the singles not being as good as the twins. I have a DA-100 and DA-150, and would never go with the single, unless the airframe is super light. But in doing so, be aware of some issues with the single. The twins are smooth, powerful, and reliable. Scott
Old 12-27-2008, 12:38 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I must have one of the good DA85's been flying it all season with no problems....as for power it is a brute on my Extra.
Old 12-27-2008, 12:53 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

me and u both Wizard, i did have to send mine in for the hub bearing replacement. Smooth and powerful on a H9 Cap 232.
Old 12-27-2008, 03:09 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I go with the 100 and use the 85 later on a wildhare edge or extra or qq pitts or something like that!
Thanks for your opinions!
Old 12-27-2008, 04:55 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

Here is the Pilot-RC 35% Yak with a DA-100. Makes a nice combo.

http://www.youtube.com/watch?v=E4eSjKB7H2w
Old 12-27-2008, 05:58 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I have the DA85 Vess 26a-b in a Lanier Edge 94" AUW is 21lbs.
The DA85 goes vertical at less than half stick. Just over 3.8 gallons thru now.
Have the DA100 mez 27x10 in a AW 36% Katana 28lbs AUW and it moves nicely.
Between the 100 and 85, the 100 is much smoother no doubt.
I would go with the DA100 stock cans and be happy. May help balance out weight wise also.
Just my two cents.
Old 12-28-2008, 12:25 AM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

My DA85 with NX26x10 prop will pull 35.5 lbs thrust.
My DA100 with the same prop will pull 38.5 lbs thrust. The 85 weighs about 2lbs less than the 100. My 85 runs very smooth, but so does my 100.
This gives you some facts to make your decision on.
Thanks
Barry
Old 12-28-2008, 05:20 AM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

No it doesn't Barry, because you're using an inappropriate prop on the 100.
Old 12-28-2008, 01:45 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

Your correct Ryan, the 100 has much more torque than the 85, and will happily swing larger prop than the 85. The 85 is nice if weight is someone's main concern as it is 1.5 pounds lighter. The 100 will have more power and torque, and be much smoother with the trade-off being slighty heavier. For me, the smooth operation of the twin, with less vibration on the airframe and equipment make it an easy choice for me. Scott
Old 01-03-2009, 12:53 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

The DA 100 is hard to beat its been time tested. Its smoother, quieter,and reliability is un equaled.
My buddies 85 on standard mufflers had ridiculous power, but man it was loud.
Old 01-03-2009, 01:23 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I think a lot of people confuse "RPM" for "power" or "Torque". I know the DA-85 is a strong pulling 85cc motor , and the RPM's might even be pretty close to a 100.....BUT you will not have the torque with the 85 that you would get with the 100. And you need that torque for good 3D performance. Look at it this way.....in the smaller glo models , a JETT 90 will get up to 14,500-15,500 rpms , versus something like a little saito 100 that will only put out about 11,000 ( i think that's right) but that saito will be way better for 3D type flying. What i'm saying is....RPM is NOT everything , it is also how "quick" the motor can get the prop to move and get it up to the upper RPM's. The DA-85 would fly the big 35% sd yak , but it wouldn't 3D worth a crap. The 100 would be a perfect match! A DA-85 is better suited for anything between 21-25lbs. 26lbs would probably be ok....but you would be pushing it.
Old 01-03-2009, 04:00 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

For 3D DA100 VESS 27A pulls like tractor and lightning fast throttle responce.
Old 03-14-2009, 07:05 PM
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Default RE: DA100 or DA85 in Aviationmodels Yak 35%

I gotta NIB DA85 I'd trade for a NIB DL111 for this bird

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