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May 11, 2008, 11:06 PM
My Soul is High
Tomokabear's Avatar
Thread OP
Build Log

Art Hobby Castor-EV 2.5M Build

A little background;
About 15 years ago I enjoyed a couple of Gentle Lady gliders. Both
of them I equipped with Cox .049 engines. One had the engine in
the nose and one had a power pod on top of the wing. The Texico
engines worked well and would get me to thermaling height.
I finally traded them for something else as time went by. I have not
had another glider since then, except for a scale motor glider.

I recently found myself wanting to get into gliders again only this
time electric powered. I was amazed at the number of offerings out
there. I probably took over a month of research before I decided
on this particular one. There were many decisions to be made as to
what particular flight performance I was wanting.
I first considered some type of gas bag but settled instead on a
little heavier loaded ship that will penetrate some wind. Art Hobby
models are not considered slow flying but the Castor seems to be
the slower of the 2.5 M gliders that they offer.

The box was delivered and opened and I was very pleased with the
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May 11, 2008, 11:27 PM
Registered User
John Cole's Avatar
Tomok, these are fun models to build. I've just started my Evolution-E.

Good luck on the project, will watch your progress.

May 12, 2008, 08:04 AM
Registered User
bosco49's Avatar
Are you going to put a motor on this? I ask because the nose was not cut out for a motor....and it should have been.

May 12, 2008, 09:45 AM
Registered User
Andy W's Avatar
No, you cut the nose yourself with the newer Art Hobby fuselages..
May 12, 2008, 10:10 AM
Registered User
John Cole's Avatar
Andy, weird... my new Evo-E had the nose cut for me already. I was happy to see this since cutting into that wonderful glass work would have made me a bit anxious! ;^)

Too bad the Art Hobby prices increased a bit, but they are still good gliders for the $$.

May 12, 2008, 11:15 AM
Registered User
Andy W's Avatar
Hmm.. my instructions say you have to cut it off. No matter, it took a few seconds on the band saw..
May 12, 2008, 04:31 PM
Registered User
I few months ago I finished my Art Hobby Ibis and I had to do the "surgery" myself for the motor. Just cut off less than you think you should and sand down to the final dimensions.
May 12, 2008, 08:20 PM
My Soul is High
Tomokabear's Avatar
Thread OP
Hi Guys,
Well, in reading over the instructions it's obvious that they
are generic and modified in places to cover a particular
aircraft. There are places in the instructions that are
not quite like the Castor I'm building.

The starting place in the manual is wing assembly. The first
item is wing tip shaping which went along quite well with a
few sanding blocks and finished with sandpaper on my fingers.

Next step is to lightly sand the mating surfaces of the wing
panels. It didn't require much, they were very well done
to start with.
May 12, 2008, 08:40 PM
My Soul is High
Tomokabear's Avatar
Thread OP
Before glassing the joining ends of the wings I
checked to be sure the carbon fiber joiner rods would
fit properly. A couple of holes were not deep enough
and required a little adjustment to be correct.

The instructions call for 20 minute finishing resin to be used
however the only thing I had on shelf was 2 hour finishing
resin. Thinking about the age of the finishing resin I decided
it would have to be checked out before using it on a project
I wanted to keep.
I did have 30 minute epoxy and it will have to do.

A few things I use for epoxy;
The plastic tray with the mutiple cups are from individual
wrapped chocolate boxes. I had a ton of these a few years
ago but the supply is dwindling. They are great for a small
mix of epoxy.
The long toothpicks are from the craft store and work well.
The metal handle acid brushes work well and if you are
careful after one use you can cut off the glued together
bristles and have one more use out of them.... ok, I'm cheap!
And, old credit cards are great for spreaders/scrapers.

Ok, so I mixed the epoxy and applyed the fiberglass to the
wing joint faces.

May 12, 2008, 09:35 PM
Riley Winglow
oneniner's Avatar
Tomoka... Where did you buy the motor you have pictured?

I am building a Sky 1.7 EV, bought recently, and it did have the nose cut for the motor. I guess some do, some don't.

May 12, 2008, 09:36 PM
The Lone Blue Plaid Flyer
Bob Cook's Avatar
I heard they were going to come out with an E version of this plane. Or an updated version. I almost bought one, but decided to wait for the new version. You must have the new one. I'll be watching the build to see how it goes.

Bob in Seattle
May 13, 2008, 12:54 PM
My Soul is High
Tomokabear's Avatar
Thread OP
I bought this particular motor at the Perry, GA show. I don't
recall the vendor I purchased from.
However, I found this motor won't fit in the nose of this pod.
The motor is 35MM O.D. The Art Hobby motors are a bit
smaller. They use the PJS type. I don't recall for sure offhand
but I believe their diameter is about 32 mm.

I ordered a Hyperion G-2220-14 from allerc. Smaller diameter.


This shows all of the G22 series motors. The price is right also.

Bob C.
From what I understand this is the new one supposedly the "V" in
the title designates this.... I think..
I believe you could order a 3m wing and a 2m tailboom with a 1.5 m
pod and they would fill your order ...with warnings... they believe in
mix and match.

May 13, 2008, 01:42 PM
Riley Winglow
oneniner's Avatar
The "V" indicates a V tail.

May 13, 2008, 06:47 PM
Registered User
I spoke with Andre at Art Hobby some months ago and he also mentioned a new Castor. My recollection was the "Castor ES" as a name. I fly a Sky 1.7 and a 2.0 EV. Wonderful planes from my point of view but pretty fast. You can really cruise your whole field quickly. Both mine are good thermal birds. They are also plenty tough for a surprise cartwheel across the field. (Tested by me personally!)

I would love to get the new Castor if it comes out.

Hey, Tomokabear. A tip on epoxy -- I use disposable plastic "dosage cups" I buy at the drug store (inexepensive) then I weigh my resin and hardener on a small electronic postal scale switched over to grams for some addtional accuracy. It's been a handy combo.

Last edited by Highride; May 13, 2008 at 07:59 PM.
May 13, 2008, 10:18 PM
My Soul is High
Tomokabear's Avatar
Thread OP
Now I know what the "V" means.

I have heard some good things about Art Hobby products.
I'm glad your "cartwheel test" came out well. I guess I
can cross that off the list of tests I will run. . . hopefully!
They seem to constantly be making changes. Waiting
for the next change is like waiting for the next advance
in computers. It never ends. . . fortunately.


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