New mystery model
- tiptipflyer
- Posts: 397
- Joined: 16 Feb 2018, 22:49
- Location: Germany
New mystery model
This time it´s not a new replica transmitter but a new model. My latest project build from scratch. It was one of the first R/C kits available here well over 60 years ago.
Can anybody identify it ?
I hope to finish it within the next two weeks. It will be flown on the button as intended and on reeds. Cheers
Frank
Can anybody identify it ?
I hope to finish it within the next two weeks. It will be flown on the button as intended and on reeds. Cheers
Frank
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- Posts: 671
- Joined: 16 Feb 2018, 06:19
- Location: Varberg or Stockholm, Sweden
- tiptipflyer
- Posts: 397
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: New mystery model
Yes Tobe, of course you are right.
Here on this forum al least 50% of the members would know it. In my club about 5 out of 300 would recognize this plane, that is less than 2%.
This plane was on my to-do-list for years. It will be electric powered with a Taifun dummy engine.
I dream to fly it sometime with my Bellaphon or Standard 30 transmitter.
Cheers
Frank
Here on this forum al least 50% of the members would know it. In my club about 5 out of 300 would recognize this plane, that is less than 2%.
This plane was on my to-do-list for years. It will be electric powered with a Taifun dummy engine.
I dream to fly it sometime with my Bellaphon or Standard 30 transmitter.
Cheers
Frank
- Wayne_H
- Posts: 812
- Joined: 17 Feb 2018, 05:26
- Location: Temora, NSW. Australia
- Contact:
Re: New mystery model
Looks great Frank
I shall follow this one with interest as I actually downloaded the plan for it late last year, having discovered it while searching through old Graupner designs.
I shall follow this one with interest as I actually downloaded the plan for it late last year, having discovered it while searching through old Graupner designs.
Cheers,
Wayne
Once a Retrobate, always a Retrobate............
Wayne
Once a Retrobate, always a Retrobate............
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- Posts: 671
- Joined: 16 Feb 2018, 06:19
- Location: Varberg or Stockholm, Sweden
Re: New mystery model
Frank...you are German and Graupner addicted so it was a safe guess!
My only Graupner kit I ever built was the Hi-Fly, lovely airplane but the building was like putting together a 1000 pcs. puzzle with immaculate instructions and if a piece didn't fit you were sure one of the pieces was not the right one and all this well before laser cutting! As I grew up in Italy the classic first trainer was the Taxi II and Amigo II. Here is a picture of my dad flying Graupner Cup in Gorizia, Italy 1963. Graupner used to have its own representative in Italy and his name was Schnabel if I remember correctly.
My only Graupner kit I ever built was the Hi-Fly, lovely airplane but the building was like putting together a 1000 pcs. puzzle with immaculate instructions and if a piece didn't fit you were sure one of the pieces was not the right one and all this well before laser cutting! As I grew up in Italy the classic first trainer was the Taxi II and Amigo II. Here is a picture of my dad flying Graupner Cup in Gorizia, Italy 1963. Graupner used to have its own representative in Italy and his name was Schnabel if I remember correctly.
Cheers,
Tobe
Tobe
- tiptipflyer
- Posts: 397
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: New mystery model
The Electra is almost ready now. The maiden flight took place prior my holiday. It has now three test flights, but the rudder still needs improvement.
Cheers
Frank
.Cheers
Frank
- PaulJ
- Posts: 605
- Joined: 16 Feb 2018, 19:01
- Location: Ipswich, UK
Re: New mystery model
It looks a lovely model Frank but for Rudder control it doesn't appear to have much dihedral. If the rudder needs "improvement", I think you would get better Rudder response with more dihedral....... Is there any way you could increase the dihedral angle, perhaps by making slightly longer wing struts?
Paul
Paul
- tiptipflyer
- Posts: 397
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: New mystery model
Thanks Paul,
not the rudder response is the problem, but the yaw stability. I am thinking of adding more rudder area.
Also I noticed a slight warp in one of the wings, which I need to eliminate, which I will do first. The next flights, hopefully with less wind, will show.
Frank
not the rudder response is the problem, but the yaw stability. I am thinking of adding more rudder area.
Also I noticed a slight warp in one of the wings, which I need to eliminate, which I will do first. The next flights, hopefully with less wind, will show.
Frank
- tiptipflyer
- Posts: 397
- Joined: 16 Feb 2018, 22:49
- Location: Germany
Re: New mystery model
This morning I did several test flights.
First I removed the warp out of the wing. Not much improvement.
Second I increased the dihedral. This makes it even worse. Very touchy to fly.
Third I increase the rudder area by about 50% and decreased the throw by 40%. Much improvement.
Fourth I removed the excess diheadral again to the inital value. Again more improvement.
Now the Electra is a nice model to fly and cruises lovely around.
The original fin has a very thick symetrical airfoil, I think a thinner airfoil with an area increased by 30 to 40% and a rudder increased by 40 to 50% with decreased throws would make the deal even better.
Cheers
Frank
First I removed the warp out of the wing. Not much improvement.
Second I increased the dihedral. This makes it even worse. Very touchy to fly.
Third I increase the rudder area by about 50% and decreased the throw by 40%. Much improvement.
Fourth I removed the excess diheadral again to the inital value. Again more improvement.
Now the Electra is a nice model to fly and cruises lovely around.
The original fin has a very thick symetrical airfoil, I think a thinner airfoil with an area increased by 30 to 40% and a rudder increased by 40 to 50% with decreased throws would make the deal even better.
Cheers
Frank
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- Posts: 750
- Joined: 16 Feb 2018, 14:11
- Location: Warwickshire
Re: New mystery model
Maybe you could add a small under-fin, like a tail skid, to add some extra side area at the rear without deviating too much from the "official" outline. You could use a piece of transparent plastic, so that it's almost invisible.