RDJeff, Great build so far! Did you simply locate the gear for the retracts in the same location on the plans as for the stock fixed gear and cut holes for the wheels and air lines?

Also, how is that box fan with the furnace filter working for you? is it keeping the sanding dust to a minimum?
Lastly, can you comment on your magnetic building surface(how's it build? dimensions? source for the metal top? etc)? That's pretty slick. Would love to have something like that!

Thanks,
Mark

Thanks Mark! This is my first pattern ship, and although it is a simple, straightforward build, it has presented new challenges for me.

The box fan works very well, can't believe how long I went without it. My wife was pleased to see it too!

The magnetic building board is a great addition to the shop. I built the bench from scratch, and topped it with a solid core commercial door that I picked up at the local building supply salvage store called Re-Store. I later decided to go with the magnetic system, so I had a local sheet metal shop produce a sheet to fit the top of the bench. The magnet system came from www.airfieldmodels.com, and has been another huge help in building. With the magnets, you can do away with pins, and use them in many different ways to hold parts in alignment. I've also found that when joining balsa sheets, after truing and gluing the edges, some strategically placed magnets will hold the sheets down dead flat, a real time saver.

Hi Jeff, Thanks for replying to my questions. I'm definitely going to look into both the box fan dust filter and magnetic building board ideas for my shop!

Just starting mine. Have wings cut. Gathering up the wood now. Have a Saito 120 for it. Anyone else out there?????

Mike

I pop in here occasionally. Not building a lot these days so not much to contribute.

I received my wood from National Balsa. Nice stuff!!! Starting my build. Anyone like to commit on how much to expect in the weight and how did it fly??? I'm expecting the 120 to pull it straight up. It's my first foam wing. Which one would weight less, built up or foam??

Hello All, After an extended hiatus (about 20+ years) from building and flying airplanes, I have started to build the 90 size Kaos from the Eureka short kit. Fun to work from plans and make a lot of sawdust! It will be powered by an OS 95 AX and I plan to finish with fiberglass and epoxy. I've got the fuse pretty much done and will start in on my first foam wing. I'll post some photos when I get a chance. My goal was to be done by the time of the Toledo Show, but.....

Kaos coming along good, My first foam wing. Came out very nice. Will look into a hot wire wing cutting setup. Just ordered last of the Monokote. Mounting tank and throttle servo. Mounted servos in tail and that's all done. Will post pics soon.

Skyhawk940

Attachment 2226471Attachment 2226472
Mostly covered, nothing fancy. Soon to be airborne. Mounted servos in tail. Glad I did because the balance is coming out very good. Don't think I'll have to add very much weigh, if any!

Skyhawk940
Sandusky, OH

Kaos all covered. Ran up engine yesterday and it runs good. Hadn't been run for 3+ years. A little worried because the tank was quite lower than the carb, but started right up and idled well. I've learned to start my Satio by flipping backwards against compression and letting it fire and flip back. Works like a charm. Was getting tired of having sore fingers due the thing firing and kicking back. It doesn't like being flipped through compression!

Skyhawk940

Skyhawk, followed your build. Thanks for posting. Beautiful job. Kaos is one of my favorite planes. .90 sized means there's even more to love! Have a blast with it

mbaulfinger,
We lived in Dayton for 20 years. Raised our kids there. Was in the Wingmasters club. Miss that part of Ohio. I was very surprized how few flyers there are in this area.

Skyhawk940

Have you heard of the Works club in the Carlisle area? Am a member of the club. Be interested to hear how your Kaos 90 flies when you get a chance.

Am a member of RZRC in Vermilion, OH. We just got our field started this spring. Also have a pond to fly off of. We have about 30+ members.
LZRC HOME Check us out. I haven't flew much the last few years, because of lack of a club and close place to fly. Going to get my wings back with my Balsanova 46 first. Hope to get out this week.

Skyhawk

Got out the field this week and flew a few times. Was surprised how fast everything came back to me. Need more practice landing though. A few more Balsanova flights and the Kaos goes up! Cut my finger on the prop edge and got some fuel in it, so I had a great day! No electric starters for me, I'm old school. Note; put some bandaids in my flight box.

Skyhawk940

After nearly 5 years, I've picked back up on this project, and will post photos soon.

We love photos.

So here's a few photos of the progress so far. Everything mocked up, with the gear bolted in. I'm still adjusting the fit of the nose gear, but now have it just about right.

https://cimg6.ibsrv.net/gimg/www.rcu...bf8d544c85.jpg



https://cimg3.ibsrv.net/gimg/www.rcu...b48dc3e323.jpg

https://cimg7.ibsrv.net/gimg/www.rcu...9c45eb70db.jpg

I built one in this size as a tail dragger with a Saito 180 FS back in 2003.

Mine was very heavy, but still flew very well.

You will like this plane.

Best of luck.


Mark D

https://cimg6.ibsrv.net/gimg/www.rcu...c79704ec41.jpg

I remember seeing your plane i another thread, and found it inspiring! Do you recall what the weight was? It's looking like mine will come out on the light side, maybe because it has dried out from sitting for so many years!

Yesterday I put all of the pieces roughly in place so I could get a sense of the CG. I was pleasantly surprised to see that it needed some tail weight. This allowed me to move the elevator servos from the wing saddle area back to the tail, and do away with the solid wire pushrods and tubes that I had in there. I have the rear servo mounts in place now, waiting for the glue to dry.

https://cimg3.ibsrv.net/gimg/www.rcu...607f578d75.jpg

By memory it was something like 12.5 lbs.- that thing was a tank.
The Saito would hover it, but there wasn't enough extra power to try it at low level.

I set my radio up to use the flaperon function (including mixing in a touch of down elevator). Made landings
a joy. My main gears were set 1 rib bay outboard from the original plans. Best ground handling plane I ever had.

Getting the elevator servos back to the tail is a good thing, much more solid than with pushrods.

It flew like a regular Kaos, but was a bit smoother in wind. The throttle response of that old Saito was unbelievable.

I still have a copy of my drawings posted on the bulletin board in the office with notes on how get at least 2 lbs out of it.
Maybe someday I will redraw them. The prototype has been waiting for the rudder to be re-attached to the fin since 2005.
How time flies.


Enjoy!

MarkD

Thanks for the info Mark. At 12.5#, no wonder it handled the wind so well! I'm hoping for 9# for mine, the Super Tigre 90 should haul it around just fine.

So, I have a bit more progress to show. I built the fillets for the wing roots, and got them all smoothed up nicely. Next, I started the covering, just the tail feathers so far. I'm using orange Chinacote to match my two existing Kaos planes.

https://cimg2.ibsrv.net/gimg/www.rcu...37f9e8b421.jpg


https://cimg6.ibsrv.net/gimg/www.rcu...172d14857a.jpg

90 size Kaos
 

Did you know that Dr. Dewey Newbold in San Antonio, Texas is the designer of this airplane. Original article was in Model Airplane News many years ago.
Dwayne Brown