AeroWorks 85cc Yak Build w/pics

[Sevans16]

I am going to post some photos of my build. If nothing else it give me a reason to keep going on this project. It should be a pretty simple build so I am not sure how much technical info will be provided??

I will be using 8711's, DA-85, Greeve's pipe(since there is a full length tunnel),

[Sevans16]

Working on the engine. Here is a pic with cowl. It is right at 6" from the front of the motor box to the front of the cowl. The DA-85 has a mount flange to drive hub distance of 5 13/16' then there is the DA85 spacer that AeroWorks provides is 15/16" and it has a cut out for adjusting the carb needles.

[STLAV8R]

Subscribed!

[wingburner]

Nice, waiting for mine to arrive in Canada

[Sevans16]

I usually do the engine first for some reason. I spent a few hours going over the covering earlier. I pretty much just went over the edges with the iron and hit the rest with the air gun. It shrunk up very well. There were quite a few wrinkles in some areas. I did get the Rudder epoxied on last night. I just ironed what I needed to(hinge line).
So here is the engine mocked up. I used the provided wood template, drilled the 4 mounting holes., put on the spacer, lined spacer up with a couple of screw drivers. Then I drill out the other 2 with 1/4" drill bit(through spacer and fuse), put 1/4 bolts in the holes and drilled out other two.

[christopherj]

Nice!!!!

[Sevans16]

I will be using 4 swb 1.25" arms. I am not sure on the rudder. On my AW Extra 260(MTW 110 can), I used 1.25" half arm on the rudder(tail mounted). I am not sure where this plane will balance with the Greeve's pipe.

I got the AW dash panel and a 4" Tru-Turn P-51 spinner(lightened, drilled for DA-85 and relieved for a Menz prop).

****update Jan 09****
I checked elevator servo arms. With 1.25" arms and using the middle holes on the control horns I have full deflection with 140% end points.

Rudder: I used a 2.5" arm. 140% travel, outside holes on the horn gave me about 43 degrees. I moved the cables to the middle hole and have 48 degree of through. The 3" arm would be a great choice, I may swap it out later.

[Sevans16]

How about this Jazz?? I always wondered about the specs you read about on these planes!!
AW 75cc Extra 260= 1625 sq in; AW 85cc Yak= 1705 sq in; Dietrich 75cc Extra 260= 1700 sq in. Number from Manufactures websites.
Dietrich Extra(top), AW Extra(middle), AW Yak(bottom)

[Dave Levett]

Based on your pics, it would seem that the wing area spec is just about right.
I,ve got a AW 75cc Extra sitting waiting to be started. I was thinking about the new 85cc Yak but decided to go with the Extra as it was available when I placed the order.

Good Luck.
Dave

[DR10044]

Subscribed!

[swatman260]

Looks good so far. Lets see some more pictures.

[luv2flyguy]

You're going to love this plane, I have the 75cc AW Yak/ZDZ Super 80 combo that I flew all this year, the 85cc is just a bit larger, it should fly almost like a 100cc plane but the power to weight will be a lot better. Mine is a rocket, insane power, unlimited vertical. Keep the pics coming, looks great so far. BTW I used 1.25" arms on the ailerons and 1.5"" on the elevator, 5955's all the way.

[Sevans16]

Well not too much progress today. Spent the day out at the field(awesome weather here). But here is my throttle/choke servo install. It was lot easier on the Extra!! Not a lot of wiggle room on the Yak. I had to cut the servo mounts down flush with bottom of the servo. I think I am going to just mount the rudder servo up front for a pull-pull. At least half of the Greeve's will be behind the balance point. A lot different than the AW Extra 260 and MTW 110 can setup where the rear mounted servo balanced it perfect. Onto the the rear stab now I guess??

[Sevans16]

Had a little time after dinner, so I piddled with the ignition. I also worked on the rear stab, I shrunk the covering and mounted the servos. I need to check into whether or not I need to go with 1.5" arms now?? I have both here on the bench.
I got the ignition box, switch and Smart-Fly Opt-Ign Kill receiver installed tonight.

[sprice50]

Looking great.