..Deleted, double post

Gpang788:
I had the 55AX on my previous pattern trainer, a TM Shadow. It was an inverted assembly with rubber engine mount, nose ring, Karl Müeller manifold and Asano pipe. Exellent running engine. Absolutely no problems running the engine inverted. I've heard the stock muffler is very noisy, but have not tried it myselff.
I used the standard Os#8 glow plug, 15/15 Aerosave fuel and a 12x6 APC prop. The planes' weight was ~2,4kg, and had unlimited vertical.

The attached photo shows the engine configuration.

As for the Osmose built, I have not had as much as a minute in the building room for a couple of weeks... (hence the heading "SLOW.."). I'm hoping to spend a couple of hours building in the end of the week or over the weekend.

Thinn
What ideas or considerations have you giving the cowling to cool off the YS .63 and exhaust system? Are you going to stay with the tiny forward slotting and really open up the bottom of the cowl, or are you going to open up the front of the cowl a little more?

I havn't started building mine yet. Still thinking about rebuilding the Oxalys 50.
Saito 82 will have more than enough power except the fuel tank location. I personally have not ran the Saito 82, but it does have more power.
You will have to install the battery behind the wing in the fuse at least a few inches back.
Since Saito 82 does not have pressurized fuel system, you may want to use a perry VP30 pump for CG located fuel tank.
The fuel tank may be a little small (not sure what size it is in the Osmose, but the Oxalys had 260 oz).
For a 10 minutes flying, it may be plenty with good throttle management.

IP

Patternflyer
Oh heck. I ordered a VP-20 Perry Pump. Should I reconsider and get the VP-30? Also the Osmose 70 comes with a 320 cc fuel tank. According to the Saito Engine Information web site, the .82 use approx. 30 cc per minute. that should give me 10 minutes of flight time, again with good fuel management.

Bob,

320cc is pretty darn good to have. I gotta check my kit since I only looked at the wing & fuse for damage check.
Never had experience with VP-20 which is for 4-cycle. It works with vibration, so not really sure how it will work. However, since it was designed for 4-cycle, try it and let us know. Reason that I mentioned VP-30 is because of the higher popularity on 2 & 4 cycle. I have several local friends using the VP-30 on Saito without any problems.

You probably won't need to go full throttle on Saito 82 even for a long vertical.
Good luck!!

IP

Brickhead,
I might just open the cowl just in front of the cylinder. As long as this hole is big enough to "cover" most of the cylinder I'm guessing it'll be OK. The opening in the back of the cowling (the pipe "tunnel" ) should be more than twice the size of the opening in front, so I don't think it will be an issue.
A rule of thumb to get the air flowing nicely through the cowling is that the outlet must be minimum twice the size of the intake. Also, the airflow must be directed through the cooling fins of the engine. If the inlet opening is too large, stators (or restrictors..) should be used to direct the airflow tightly around the engine.

What's the prop spinner diameter for the Osmose?

hello
it's 57 mm

Thanks. Looks like i need to order some new spinners.

I ordered an TruTurn FAI spinner (belive it was a 2 1/4") from central. You don't get a light backplate on these smaller spinners, so it becomes rather heavy with the nut and bolt in place. The nylon spinner purchased with the kit comes with a light alu backplate..

Thinn
Thanks for the 2:1 cowl cooling ratio. I did not know that one. I do not want to lose and engine and that shared information will go along way.

Hy guys,

I will start mine Osmose and i choose the new OS70FS Ultimate and Hitec high torque servos HS635-HB.

I will updating with some images.



RD

video please

No videos from me yet...
The build has had a rather long break due to other comitments [&o] - But I'll get right on it as soon as I can! I actually had a 10min trip to my "room of joy" yesturday, the first in weeks.. Spent it wisely just staring at my Osmose

My mate is about to start building his and is going to power it with a os 55ax

I'm back... -Time for an update.

I've spent a couple of nights building now, and I'm close to completion. All that's stopping me now is the lack of 2 ball-links for my ailerons! But I'm guessing I'll get hold of these in due time.

So far, the following has been done:
- Carbon pushrod for the elevators (never liked the heavy hardwood stuff..)
- MK control horns fitted on elevators and ailerons
- Re-arrangement of servo positions (thanks to earlier posts..)
- Wheel pants assembly
- Cowling adjustments, cutouts and assembly

No major concerns or mind blowing problems. Pretty straight forward actually! Way to go Kyosho...

I'll throw in some photos that tell the tale far better than I can describe.

Things to do..:
- Finish aileron controls
- Fit an external plug for the glow plug
- Re-think and fix a less hazzle way to mount the wing bolts (it's a real pain!!)
- Check if throttle servo mount is adequate
- Add battery and reciever
- Run in engine
- Maiden...

Some more photos (cowling prep).
Cannot upload more than 3 at the time due to "fast" internet connection....

Dorsal fin assembly. Thanks to tips earlier in this thread! I used the colors as guide instead of the canopy edge, but it worked uot quite neat in the end.

Finally, a test mock-up to get a perspective on what I'm working on!

looks sweet. Now lets see some flight video.

Here is some pics of my mates model, who is powering it with an os55AX, still in construction phase.

Thinn
My Osmose 70 arrived from Espirit Models of Florida. They went a little extra on the package as they packed the model with foam peanuts and covered the model box with a heavy cardboard. I am glad they did as the model is in great condition. Kyosho has put together a quality ARF as the glued joints are well done compared to other ARFs I have purchased. They even sealed areas exposed to possible fuel contamination. I have followed your build thread and enjoyed every bit of your efforts. I hope to see your models complition and that you have many enjoyable flights. The past two weekends here in Pittsburgh, Pa have been very high winds and today is snow. So I have to get busy on the Osmose 70 and be ready for that unexpected good weekend of flying. Again Good Luck.

Thank you!
My model is completed minus the battery and reciever.. I have not got around to test it yet, as both the weather and other comitments has "killed" all weekends... The sun sets at appeox.16:00 now, so flying during the weekdays is a no-go..
I'll drag myself out in my hobby room one day and take some pics of the final build. I have done some smaller alterations since my last post.
I did find that the throttle servo installation was a bit too wobbely, and I would not have gotten a smooth throttle responce.
Also, the external glow-plug assy is in place. I used the KISS principle, so it is now an easy and light solution.

Finally, I completely finished the model.... (Maybe mayden this weekend??)
I made a new battery pack (4cell Sanyo NiCd1100mAh), put in the reciever and set up all servos etc. I just copied the program from my Oxalys, so setup should be a bit quicker than normal (hopefully...).

Here are som engine pictures. Note the simple, light plug connection... Fuel tubing is an undervalued tool!
And the elongation of the needle....well.. amazing what you can use those T-end building pins for!