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Old Oct 18, 2015, 05:52 PM
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Will fly for food
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Bellevue WA,
Joined Dec 2003
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Last weekend at the Last Chance Aerotow I had my Blanik, which has telemetry, and it reported I detached from tow at near 1800' and within a few minutes I got into a hat sucker and went to 2606' AGL. It was a tiny speck and I bailed out of the thermal. Great flying glider.
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Old Oct 28, 2015, 02:16 PM
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Quote:
Originally Posted by pmccleave View Post
Guys,

I am getting ready to re-maiden my Blanik and was wondering after these have been flying for awhile what everybody has settled in on for CG. I have gone through the posts in this thread and have found everything from the original 20mm to 80mm. My first day of flying the plane originally only lasted two flights so I was not able to sort it out to know if I had right. I have it set right now at 75mm. Any feedback will be greatly appreciated.

Thanks,

Pat
In testing I went as far back as 90mm, aircraft flew ok however would not recover from a spin. C of G at 20-30mm from the LE the aircraft recovered instantly from a spin.

I know you have to ad more nose weight (4lbs approx) to reach the recommended C of G however it's is there for a reason, plus teh extra pound you save doesn't really add much to the models performance, it actually likes the weight.

You can run further back that recommended if you don't plan on doing aerobatics howevr personally I feel the forward position makes It a better handling aircraft,

C of G is like salt, add to taste however too much will hurt you :-).
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Old Oct 28, 2015, 02:25 PM
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Wow, I'm amazed at the usable CG range of this sailplane. We're talking in the range of 3". Is there something about the configuration of this plane, wing plan, etc. that will tolerate such a broad range?

TIA,

Steve
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Old Oct 28, 2015, 02:56 PM
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I ended up moving my CG further Forward than my original setting after reading Len's comments and am somewhere around 60mm now and my plane recovers very well from a spin. I did not try any Flat or Inverted Flat Spins but did spin it on multiple occasions and it recovered very quickly. Not at all doubting what has been said above by Team Horizon just giving my two cents worth after putting my Blanik through the paces at our last Aerotow. Of course a lot of my Aerobatics look more like a Drunk Pilot Routine than real Aerobatics.

Thanks,


Pat
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Old Mar 25, 2016, 07:08 AM
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United States, MI, Ann Arbor
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Well Glenn, been there too...

Just in case you want to go a little further as you have removed the windows...

I did something similar last fall and decided to condemn the Windows in order to bring back strength in the area. My intend is to avoid shear and compression, plus it stiffen the landing gear support.

Glass first

Sans titre by steffruelle, sur Flickr


Then carbon fiber behind front former, on the TE area and on the top seam (it split there)


Sans titre by steffruelle, sur Flickr
]

Filler and sanding


Sans titre by steffruelle, sur Flickr


Then paint, matching code for R&M paint is MA145.10 ( thank Scott for the fix !)


Sans titre by steffruelle, sur Flickr


And vinyl to simulate the Windows


Sans titre by steffruelle, sur Flickr


Pretty happy of the result

Here is the flickr album with all pictures

https://www.flickr.com/photos/422200...7654659741610/

Stephane
Team Horizon
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Old Apr 12, 2016, 05:32 AM
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just a quick one for those that have fitted the air brakes. Do the self tapping screws come with the air brakes or are they supplied in the blanik kit? My Air brakes have no screws with them but i found 6 screws in the kit that fit the bill and just wondered? as i didn't want to steal from the kit! Thanks

cheers Chuck
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Old Apr 12, 2016, 06:27 AM
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It's been a while but I'm pretty sure they are in the kit
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Old Apr 12, 2016, 06:29 AM
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TEAM HORIZON
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They're in the Kit.
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Old Apr 12, 2016, 07:15 AM
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Thanks guys all fitted!

Chuck
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Old Apr 12, 2016, 11:19 AM
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Those are probably the easiest spoiler to install! Only issue I had was the floor inside the spoiler bay was too high, the spoilers does not sit flushed with the wing surface. I have to take some of the wood out.

Brian, an EAJ
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Old Apr 13, 2016, 07:25 PM
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I also had to remove a little to get them flush
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Old Apr 15, 2016, 10:41 PM
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Quote:
Originally Posted by bhchan View Post
Those are probably the easiest spoiler to install! Only issue I had was the floor inside the spoiler bay was too high, the spoilers does not sit flushed with the wing surface. I have to take some of the wood out.

Brian, an EAJ
Must of fixed that problem for the second batch as mine fit good!

Ok Question time again

Whats the general consensus on the Wing Tips?

Do you just glue them on and have the lump at the end of the wing for storage.

Or

Do you make them removable?

Looking at it making them removable looks easy. The 2 holes already in the tip could have some carbon rod fitted and slotted into the end of the wing then a little tape to hold it in place

So what did most do? What would you do? would you do what you did do again if you had the option?

thanks guys

Chuck
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Old Apr 16, 2016, 05:53 AM
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I'd probably make them removable if I did it again with some carbon rod and rare earth magnets, though the wing bags I had accounted for them.
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Old Apr 16, 2016, 06:50 AM
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Chuck,

When I build one for a friend, I did exactly what Andy said, put two carbon rods in with a tube in the wing, recessed a magnet in the parts and it was done. Piece of cake and never a problem.

Len
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