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Eflight Blanik 4.2m with turbine?

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Old 06-13-2013, 06:38 AM
  #1
docgboy
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Default Eflight Blanik 4.2m with turbine?

I just recently receive my new Eflite Blanik glider. I am interested in putting a turbine on it. The wings on this glider are like surfboards and I know can hold up to aerobatic manuveres gliders are capable of.

I would like to hear from those of you who have put turbines on gliders what could be concerns or areas I shoud pay particular attention to. My biggest hurddle and probably most important is the design of the turbine support modual. I have some ideas on this based on the full scale turbine powered Blanik.

Look forward to the discussion

Scott
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Old 06-13-2013, 07:48 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Wow. I can't help but that will be cool.

Can't wait till I get my Blanik
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Old 06-13-2013, 08:27 AM
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PHIL GREENO
 
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Default RE: Eflight Blanik 4.2m with turbine?

Will receive my Blanik kit tomorrow.

It weighs 10 kilos (22 lbs) AUW as a glider so i will be interested also to see which turbne would be suitable, maybe Merlin VT80, JC P100.

The fin might need a heat shield ?

Phil.
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Old 06-13-2013, 09:54 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Pablo Fernandez did it and already test flew it this week.
Scott
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Old 06-13-2013, 10:43 AM
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Default RE: Eflight Blanik 4.2m with turbine?

P-60 would be perfect, gliders don't need 1:1

Bit of right thrust, bit of up thrust. Heat deflector on the fin LE. Fuel near the balance.

Dw
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Old 06-13-2013, 11:07 AM
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Default RE: Eflight Blanik 4.2m with turbine?

I was also going to say, 1:1 on a glider would be silly, remember the lift efficiency these things have including a low drag fuse, even a P20 would assist the glider as it's used to being propelled by the natural thing called wind

I would go for a P60 though, bit of oomph and all that jazz
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Old 06-13-2013, 11:19 AM
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Default RE: Eflight Blanik 4.2m with turbine?

I agree 1:2 is nearer the mark. The glider will retain the energy for much longer than a normal scale aircraft. If you fly with 1:1 there is a real danger you would rip the wings off. I would think a wren 44 or kingtech k60 would be good candidates in addition to the p60.

Have a look at this video of my Swift S1 which is 3.2 m and weighs 8 kg wet and is powered with one of my Sprite engines of 3.2 kg thrust.

http://m.youtube.com/#/watch?v=QUv7j...%3DQUv7j_r-L1c

The wing on this glider is very strong and has a solid carbon joiner. As you can see it is no slouch.

John
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Old 06-13-2013, 11:29 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Pablo. If you look at this thread please post pictures. I have been thinking about this ever since this was announced

Inspiration:

http://youtu.be/LaFcFgqpc_Q
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Old 06-13-2013, 02:46 PM
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Default RE: Eflight Blanik 4.2m with turbine?

Here you go. It actually Flys fantastic. I did have to add a nose wheel as the thrust pushes the nose down on takeoff.
I used Evolution engine standoffs for turbine mount.



Pablo
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Old 06-13-2013, 02:52 PM
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Default RE: Eflight Blanik 4.2m with turbine?

Some more
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Old 06-13-2013, 03:00 PM
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Default RE: Eflight Blanik 4.2m with turbine?

Heat deflector
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Old 06-13-2013, 11:58 PM
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Default RE: Eflight Blanik 4.2m with turbine?

Nice!

I have a wren mw44 gold kero start with only 27 minutes and on 4 months old for anyone interested....

Regards Luke
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Old 06-14-2013, 12:02 AM
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Default RE: Eflight Blanik 4.2m with turbine?

The Bee looks a good choice. I had overlooked that when replying earlier. Interesting you had the same issue about the nose wheel as I had with my Swift. I also had to add a nose wheel to stop the nose burying itself in the ground at takeoff. I have been too lazy to fit a retract mechanism and I know people hate seeing it.

Incidentally the price of this glider is really quite high. I see that there are optional flaps and air brakes. On a plane like this powered by a turbine I would strongly recommend you have them fitted. The glider will come in fast even at a low angle and float on. Our Swift has both flaps and airbrakes and it slows very quickly with the air brakes. In the Uk the Blanic with these options is over £800. Paf-Flugmodelle do a similar size Fox at about the same price as do TopModel in CZech republic and Blue airlines in Germany.

John
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Old 06-14-2013, 12:13 AM
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Default RE: Eflight Blanik 4.2m with turbine?

I'm using the crow on my Blanik. No issues slowing down.
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Old 06-14-2013, 01:14 AM
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Default RE: Eflight Blanik 4.2m with turbine?


Quote:
ORIGINAL: Jgwright

The Bee looks a good choice. I had overlooked that when replying earlier. Interesting you had the same issue about the nose wheel as I had with my Swift. I also had to add a nose wheel to stop the nose burying itself in the ground at takeoff. I have been too lazy to fit a retract mechanism and I know people hate seeing it.

Incidentally the price of this glider is really quite high. I see that there are optional flaps and air brakes. On a plane like this powered by a turbine I would strongly recommend you have them fitted. The glider will come in fast even at a low angle and float on. Our Swift has both flaps and airbrakes and it slows very quickly with the air brakes. In the Uk the Blanic with these options is over £800. Paf-Flugmodelle do a similar size Fox at about the same price as do TopModel in CZech republic and Blue airlines in Germany.

John
Hi John, do you have any suggestions to make a modification to prevent the nosing in prior to take off ?

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Old 06-14-2013, 01:51 AM
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Default RE: Eflight Blanik 4.2m with turbine?

I just fitted a fixed wheel, well to the front. It looks ugly and really needs a retractable wheel. Single wheel glider retracts are available in various sizes. Hobbyking do various sizes with and without gear doors and are with electrics. Not sure how strong they are though. This wheel is only used to stop the nose burying itself especially on grass runways. You want it well forward of the main landing wheel. The full size Grob 2 seater has twin wheels and there are others as well. Have a look for inspiration. Have a look at the video link I posted, takeoff is not a problem when you have a second wheel.

We have crow and in my opinion is not enough to make landings easy and spot on. If you are spending all that money on a plane it is a false economy not to fit them.

I shall follow this thread with interest.

John





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Old 06-14-2013, 02:07 AM
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Default RE: Eflight Blanik 4.2m with turbine?

The Blanik has a bit more drag than your swift. Maybe this is why slower landing speed are achived without the use of airbrake/ spoiler. Honestly there are no issuse with landing or landing speeds. I will try to get some video very soon.




Pablo
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Old 06-14-2013, 02:29 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Pablo

Interested to see the video when you have it on line. Perhaps you could post a photo of your nose wheel addition.

John
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Old 06-14-2013, 02:50 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Nose wheel
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Old 06-14-2013, 04:09 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Pablo

Neat installation, you have a marketable panel and wheel there!


John
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Old 06-14-2013, 07:43 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Pablo
Do you have some wood built up inside the fuse to support the mount and is there any cross bracing between the root ribs? I am so stoked to do this now that I see it is doable. Also, I would have gone way to big on the turbine. I was thinking K80 but now 60 is looking more resonable. the Super Bee is a nice engine if I could find one at a resonable cost

Scott
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Old 06-14-2013, 09:12 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Hi Pablo:

I presume the nose wheel is to prevent rash when flying off asphalt and not to increase the angle of incidence of the wing during takeoff. If that is the case, since I would be flying the Blanik 100% off our grass field, I don't think I would need the nose wheel. Right?

Tom
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Old 06-14-2013, 09:50 AM
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Default RE: Eflight Blanik 4.2m with turbine?

Can you post a photo of your Blanik's interior to see how you placed all the turbine ancillaries. Thanks.
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Old 06-14-2013, 10:47 AM
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Default RE: Eflight Blanik 4.2m with turbine?


Quote:
ORIGINAL: docgboy

Pablo
Do you have some wood built up inside the fuse to support the mount and is there any cross bracing between the root ribs? I am so stoked to do this now that I see it is doable. Also, I would have gone way to big on the turbine. I was thinking K80 but now 60 is looking more resonable. the Super Bee is a nice engine if I could find one at a resonable cost

Scott

I laid up carbon fiber in that area. Then I use 2"x2" 1/8 ply square glued in under the carbon. The area is Very rigid. Zero flex in that area.
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Old 06-14-2013, 10:50 AM
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Default RE: Eflight Blanik 4.2m with turbine?


Quote:
ORIGINAL: Tom Antlfinger

Hi Pablo:

I presume the nose wheel is to prevent rash when flying off asphalt and not to increase the angle of incidence of the wing during takeoff. If that is the case, since I would be flying the Blanik 100% off our grass field, I don't think I would need the nose wheel. Right?

Tom

Actually it did help with angle of attack. I use full elevator on takeoff the whole way down the runway. Lifts off gently then starts becoming more responsive to pitch.
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