Snark5T + Cox .15

That Snark looks familliar. I recognize the picture & colour scheme.
I think I have one up in the loft without the wing. Came with stuff from my brother's estate. It was electric so never really interested me. It is very light balsa/ply construction. Seems quite flimsy.

Rod

We are I think, at the start of ARF models, it is possible that, who know and have information to dump everything here has to do with the EZ brand.
This particular model, buy it take a long time, actually to see it was Brand EZ, for some reason relates to the Mark Cox, and Cox and some of their engines came in models telgopor or espandido polyurethane Brand EZ.
This particular model, has a sum of materials. It is composed of balsa, plywood, pine, thermoformed plastic, cardboard decorated. It is a combination of interesting materials.
In the box you can read Los Angeles & Osaca what makes me think they were the beginnings of American designs manufactured in Japan, but I repeat, it is possible that someone can provide information on the brand in question EZ.
Originally it is for electric motor, and for two or three channels, not originally brings spoilers, so I decided to make some modifications.
The wings are ribs balsa wood stringer leak, and the plating is totally foam type material.
The model will be powered by a glow engine and fabricare ailerons.
Therefore it will relate directly with the Cox line engines.
Shortly I'll show them step by step the armed and the result we will see once you fly!
The decals are self-adhesive and have applied smoothly.
The engine cowling, as the windshield is plastic thermoformed ABC type, same for the base of the fuselage of the same material.
The marginal edges, central reinforcement wing leading and trailing edge, over the edges of the upper end of stabilizer and rudder more anchoring stabilizer and rudder to the fuselage, are also thermoformed plastic ABC.
The wheels have a plastic rim and the cover is foam rubber, very soft in my opinion, therefore decided to replace.
The main gear is steel rebar and the tailwheel is thermoplastic polymer, which acts tailwheel.
I leave you some pictures! ...

This is the original motor.
With brushes Brand Mabuchi

on going!...

As I said, originally this model does not bring spoilers, for that reason, I have decided to manufacture and thus have the radius from the four basic channels, motor, aileron, elevator and rudder.
As I will place a servo spoiler, from radio programming, I can make them falp + spoiler and that will give me the extra edge to modify the airfoil to my taste, either flying, landing or achieve better lift at low rpm motor.

That's a very interesting model with all the different materials to work with // I love watching you build always learn something new . Eric

Here are some "factory" tips
http://manuals.hobbico.com/gpm/gpma0165-glow-conv-instructions.pdf

What you've done looks very good, can't wait to see the spoilers completed.

getback wrote:That's a very interesting model with all the different materials to work with // I love watching you build always learn something new . Eric

Erick continue sharing!
Mauricio

Marleysky wrote:Here are some "factory" tips
http://manuals.hobbico.com/gpm/gpma0165-glow-conv-instructions.pdf

What you've done looks very good, can't wait to see the spoilers completed.

Interesting !, thanks'll present this information.
Mauricio

Additional ailerons (as the kid does not bring), is made of balsa wood, do not place hinges, the MONOKOTE itself was positioned so that also acts as a hinge.

Here place the servos, elevator, rudder and throttle ....

Installation onboard battery

1/2A Nut wrote:

MauricioB wrote:Hi guys, I will share with you, this is my new project.
It is a relatively old model, which is in its box, I'll leave the final photos of the engine!
It is called SNARK and is for electric motor.
I want it here, dedicate this work to Mr. 1 / 2A NUT has given me a lot of information when I requested.
It is a pleasure for me to share with and participate in this forum. Greetings, Mauricio.-

Thank you Mauricio very kind of you!
This new ARF project is going very smooth!!!!!!!!!!
Are you using the throttled Sportsman .15  on this one?  

Hello, thank you for the information you gave me and also for everything that capsize in the forum, it is of great interest, based on your own experiences. That is fantastic!...

On engine 15:
I gave him by chance, since it had eredado a boy his grandfather and was not of interest to the subject of practice model airplanes.
Its design and special size, make it totally surprising to me, because they are very rare find or see in my country, I had never seen one, let alone running.
That was how I saw a picture because I did not know these motors and it caught my attention. I decided to buy it and automatically I realized that his condition was spotless, had only burned glow plug solved this, install it on a bench and gave up, I was surprised that almost tore the second attempt! He gave me much joy.
I researched some of this engine and thus met data Mr. Dale  Kirn and that he was responsible for the design of this engine.

https://www.modelaircraft.org/files/kirndale.pdf

Some time ago, I posted on the contest photo of the month calling: Past, Present and Future, as I understand the experiences of this engine in its past, a quiet moment in the present, to return to the skies in the future, and that time is coming.
It was so ask for help to see if it was possible to control its operation and thus have control of the motor. Immediately and thanks to this forum, many people reported me by giving me some solutions to achieve the objective, which of course, I would like to each shake hands and greet me personally if possible.

https://www.coxengineforum.com/t9410-video-cox-sportsman-15

It was then that Mr. 1/2 NUT, hybrid solution I put a carburetor that fulfills the function of managing the air like who operate the engine.



For all this I want to thank those who make possible the forum!...Mauricio.

1/2A Nut wrote:The .05 can motor typically at full amp draw 12 to 15A x 7.2v battery for 110w power system.
The Sportsman .15 will produce up to around 170w depending what prop.

In your video you made 12,300 max rpm 7x5 prop
48.2mph .160hp / 119w / 16.3oz thrust.

With throttle you should have a great flying plane, make sure good balanced prop minimum vibrations
on the air frame. The pre-assembled parts have brittle glue over time.

Thanks for all this information will be very useful! ....Mauricio.

Oldenginerod wrote:That Snark looks familliar.  I recognize the picture & colour scheme.
I think I have one up in the loft without the wing.  Came with stuff from my brother's estate.  It was electric so never really interested me.  It is very light balsa/ply construction.   Seems quite flimsy.

Rod

Hi, thanks for leaving your comment.
You have the possibility to build it ?, seems to be a very good model, I go for the result soon!
Regards, Mauricio,.

RX installed..

Set the main train and battery cover and RX...

Controls Tail...

Aileron Controls....