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Old Apr 30, 2008, 11:00 AM
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Quote:
Originally Posted by lubak
Thank, Mitja

And video from maiden flight:

http://www.youtube.com/watch?v=w6ExGUttlyo
Excelent video, nice background music and a perfect flying.

I enjoy looking it!

"What a lucky man you are!"


Mitja
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Last edited by ultralajt; Apr 30, 2008 at 11:33 AM.
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Old May 03, 2008, 01:47 PM
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I'm a late-comer

Is this a commercial glider? or a scratch built? source of kit or plans?

Enjoyed the recent video.

LarryR : )
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Old May 03, 2008, 04:11 PM
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Quote:
Originally Posted by LareeRudee
Is this a commercial glider? or a scratch built? source of kit or plans?

Enjoyed the recent video.

LarryR : )
Guppy is my own design.

The main differences from other electric sailplanes of similar wing span are:
- cute design
- 95% made from wood
- unique reinforcment of rear fuselage part using carbon tube "hidden" by balsa
- low number of wing ribs (and they are made from quite thick balsa to be stiff)
- "user friendly" behaviour of the model
- ease of building
- quite well done drawings and instructions
- compheresive support here in rcgroups for all builders.

You can build Guppy from plans:
http://www.trgovinamodelar.com/Media...lans_tiled.pdf
and maybe you are interested in HOT wings with ailerons:
http://www.trgovinamodelar.com/Media...s%20krilci.pdf

and also look at assembly manual for Guppy:
http://www.polecataero.com/uploads/G...mblymanual.pdf

Or manual for HOT wing assembly:
http://www.trgovinamodelar.com/Media...er%20krila.pdf

or even order the KIT version at:
http://www.polecataero.com/products/guppy

I suggest you to take two evenings and browse trough both parts of Guppy to see more abot and find out how it is made and how it fly.

Regards!

Mitja
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Old May 03, 2008, 08:22 PM
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Don't forget the great index at
http://www.rcgroups.com/forums/showt...28#post7552305
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Old May 03, 2008, 10:57 PM
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Yes, will browse the two threads

Quote:
Originally Posted by ultralajt
Guppy is my own design.

...........I suggest you to take two evenings and browse trough both parts of Guppy to see more abot and find out how it is made and how it fly.

Regards!

Mitja
Yes, I admit that I "jumped" prior to reading all that IS there already, but if I recall, it was VERY late at night [my time] and I liked it so much that I "asked before I read"..... but in your latest post, you gave lots of good "direction".

Thanks,

LarryR : )
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Old May 04, 2008, 10:50 PM
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there is also a European supplier from Poland http://www.e-flightrc.com/catalog/pr...roducts_id=543

I have bought the Guppy from these guys and finally after almost a year I manage to start the building (please no comments about that )

my first question is about the bottom of the fuselage, in the kit there are 3 sheets of 2mm balsa and another one sheet of 4mm, it looks like I have to glue the 3 sheets together, but what about the thickest one?
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Old May 04, 2008, 11:50 PM
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Beautiful

Quote:
Originally Posted by orck
there is also a European supplier from Poland http://www.e-flightrc.com/catalog/pr...roducts_id=543

I have bought the Guppy from these guys and finally after almost a year I manage to start the building (please no comments about that )

my first question is about the bottom of the fuselage, in the kit there are 3 sheets of 2mm balsa and another one sheet of 4mm, it looks like I have to glue the 3 sheets together, but what about the thickest one?
I must say it AGAIN........... that is a BEAUTIFUL plane. Now for me, it must have TRANSPARENT covering; too beautiful to cover.

LarryR : )
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Old May 05, 2008, 12:20 AM
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Quote:
Originally Posted by orck
...
my first question is about the bottom of the fuselage, in the kit there are 3 sheets of 2mm balsa and another one sheet of 4mm, it looks like I have to glue the 3 sheets together, but what about the thickest one?
You should glue 3 sheets (2 mm balsa) together for the fuselage bottom. This is the only way, to get proper curvature. Glue them together and let the glue dry while clamp between two pieces of styrofoam, that are cut in proper curve shape.
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Old May 06, 2008, 09:33 PM
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An ARGENTINIA guppy!!!

Hello everybody, my name is Javier Suzuki, i`m from argentina and i would like to show to all of you my handmade GUPPY flying in Escobar Flying Field in Buenos Aires. Thanks Mitja, i`ve been following this thread and I made this exellent plane from the plans published. Actually im thinking in building a 2m guppy.
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Old May 07, 2008, 01:58 AM
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Dear Matja,

My hotliner wing is almost finished. The assembly manual is easy to understand even if it's not in english. However, I have a question about de fixing of this wing on the fuse. Is it necessary to tune the incidence angle of the wing? Do we have to add some thickness between the trailing edge and the fuse? Or we simply screw the wing as it on the fuse?

Previously in the thread, you have written some words about a 2,5m guppy. I'm very interested by a Guppy of this size. Do you have some plans? Even if it's still an "experimental" plan, I'm interested.

more details on my website
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Old May 07, 2008, 02:00 AM
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Ljubljana Brnik, Slovenia
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Quote:
Originally Posted by javisuzuki
Hello everybody, my name is Javier Suzuki, i`m from argentina and i would like to show to all of you my handmade GUPPY flying in Escobar Flying Field in Buenos Aires. Thanks Mitja, i`ve been following this thread and I made this exellent plane from the plans published. Actually im thinking in building a 2m guppy.
Hi Javier!
I am happy for you! Wish you many happy flights!

If you are looking forward to build enlarged version of Guppy, there is a thread about building 2 m wingspan Guppy:
http://forum.modelarji.com/viewtopic.php?t=24837
You wil certainly dont understand the reading, but many pictures in thread tells a lot about.

Mitja
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Old May 07, 2008, 04:14 PM
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Brescia, Italy
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Quote:
Originally Posted by ultralajt
Hi Javier!
I am happy for you! Wish you many happy flights!

If you are looking forward to build enlarged version of Guppy, there is a thread about building 2 m wingspan Guppy:
http://forum.modelarji.com/viewtopic.php?t=24837
You wil certainly dont understand the reading, but many pictures in thread tells a lot about.

Mitja
Wonderful construction! It's a pity I can't read the text.
Interesting solution for the ailerons links; I'm only afraid about precision after long time.
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Old May 08, 2008, 02:05 AM
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Quote:
Originally Posted by CANTZ506
Wonderful construction! It's a pity I can't read the text.
Interesting solution for the ailerons links; I'm only afraid about precision after long time.
It is well known RDS system (Rotary Drive System) and works without slack, it has almost no friction, there are no elements outside wing contour (less parasite drag), and doesnt owerload the servo.

There is a trick to make RDS without slack.

The steel rod is captured between two plates of low friction material. These plates are separated on proper distance with two balsa stick that are slightly thicker than a rotary steel rod.
Now you squeze two plates together to contact the rod. The balsa stick are now compressed to proper height. Now drop some CA glue on outside of that balsa sticks and they instantly remain at current thickness. So, friction plates are now in just proper distance and steel rod has minimum possibleslack.

Some links to use of RDS system:
http://www.irfmachineworks.com/rds/
http://www.irfmachineworks.com/rds/article.html

Mitja
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Old May 08, 2008, 08:54 AM
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Brescia, Italy
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Quote:
Originally Posted by ultralajt
It is well known RDS system (Rotary Drive System) and works without slack, it has almost no friction, there are no elements outside wing contour (less parasite drag), and doesnt owerload the servo.

There is a trick to make RDS without slack.

The steel rod is captured between two plates of low friction material. These plates are separated on proper distance with two balsa stick that are slightly thicker than a rotary steel rod.
Now you squeze two plates together to contact the rod. The balsa stick are now compressed to proper height. Now drop some CA glue on outside of that balsa sticks and they instantly remain at current thickness. So, friction plates are now in just proper distance and steel rod has minimum possibleslack.

Some links to use of RDS system:
http://www.irfmachineworks.com/rds/
http://www.irfmachineworks.com/rds/article.html

Mitja
Thanks for the info and the links, Mitja.
"Reading" again the post, I noticed that the two plates in contact with the rod are out of VTR (vitroplasta); initially I tought they were out of plywood.
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Old May 08, 2008, 11:26 AM
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(I hope this is the last quastion I am making, I feel sorry about alla these questions)
can you please give me direction on the use of urethane glue?
it is supoosed to expand so how we apply the glue? am I supposed to close the carbon with the balsa? but if the glue expands a lot I believe that it will become a mess of carbon, balsa and glue

because I dont have a clue what this glue look like (and I wont be lucky if i go to the stores asking for urethane glue) can you suggest me some brands?
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Last edited by orck; May 08, 2008 at 11:31 AM.
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