The Parallax - Build Thread - RC Groups
Thread Tools
May 04, 2014, 08:16 PM
Jer. 29:11
jeffsch's Avatar
Build Log

The Parallax - Build Thread


At the suggestion of the designer mopar_man, this is a thread for your experience building the Parallax, an asymmetrical park flyer.

Terry Dunn's Parallax (3 min 25 sec)


The model was featured in the May 2014 issue of Model Aviation:
http://www.modelaviation.com/parallax

Plans are available from the Model Aviation Plans page:
http://www.modelaviation.com/plans

Clear canopy available from Park Flyer Plastics

Data for the 100% version (from the plans):

Wingspan: 32 in.
Length: 33-1/2 in.
Weight: 14-17 oz.
Wing Area: 161 sq. in.
Motor: 100-200 watt outrunner
Battery: 3S 800-1300 mah
Servos: 4 * 9g servos
Last edited by jeffsch; May 04, 2014 at 08:46 PM.
Sign up now
to remove ads between posts
May 04, 2014, 08:37 PM
Jer. 29:11
jeffsch's Avatar

A 1/4" foam build


The Parallax is such a cool model, I had to build it.

I didn't have a ready source of 1/2" foam to hand, so I adapted the plans for 1/4" foam; it makes the build a little bit more complicated, but the plans are so straightforward that I don't anticipate any problems.

Here's my progress up through getting the fuselage framed up.
May 04, 2014, 09:02 PM
Terry Dunn
mopar_man's Avatar
Thanks Jeff,
I'm looking forward to seeing how you and others interpret the plans. Looking good so far.
Terry
May 04, 2014, 09:47 PM
Registered User
rayonnair's Avatar
Hey Jeffsch, what in the world are those triangular things you are using to hold things in place? They look magnetic too.
May 04, 2014, 09:57 PM
Jer. 29:11
jeffsch's Avatar
Magnetic right angle triangles from Harbor Freight. I use them overtop of a galvanized steel building sheet, and they work great at holding parts in place.

http://www.harborfreight.com/4-3-4-q...lder-1938.html
May 04, 2014, 09:59 PM
Registered User
randynsaudi's Avatar
welders use them to hold parts a a perfect 90 degree angle. so there has to be a metal plate under the plans..
May 04, 2014, 10:41 PM
Registered User
rayonnair's Avatar
Oh man, I've been doing it wrong all these years. I didn't even know they existed. What a clever little doohickey. Thanks, I shall hunt around and see if I can get it locally. The side of one of my old computers is steel and should do nicely as a flat ferromagnetic surface.
May 05, 2014, 12:43 AM
Registered User
ekees's Avatar
Quote:
Originally Posted by mopar_man
Thanks Jeff,
I'm looking forward to seeing how you and others interpret the plans. Looking good so far.
Terry
Me too! As a noob builder from plans, I hope to learn a lot from this build thread.
May 06, 2014, 10:34 AM
Jer. 29:11
jeffsch's Avatar

1/4" foam build progress


I glued the bottom of the fuse onto the sides. (No picture.)

The pod is going together in the same was as the fuse.

I put the first former 2" from the front of the pod, two formers to support the wing, the last former where the pod begins to taper in the back, and another former or two to help shape the front of the pod.

Each former is a rectangle, the width of the top-view at a given location on the plans, the height of the side view, and with notches cut out of its corners for the doublers. (Took longer to describe than to do it.)
Last edited by jeffsch; May 08, 2014 at 11:05 AM.
May 07, 2014, 10:58 PM
Registered User
RJD1234's Avatar
Terry - this build seems to be a bit different than the one presented in the AMA magazine. I ordered the plans and just got them today. Will start to build soon.

Richard
May 07, 2014, 11:15 PM
Terry Dunn
mopar_man's Avatar
Quote:
Originally Posted by RJD1234
Terry - this build seems to be a bit different than the one presented in the AMA magazine.
You're right. I build my fuselage and pod assemblies with 1/2" blue foam, so I don't need the formers and doublers that Jeff is using. Apparently many folks have trouble finding the 1/2" foam in their corner of the country, so they're substituting with the thinner stuff you see here (which needs the formers). Use whichever method you're more comfortable with (or have materials for).

I'll try to add to the thread with a build matching the plans.

Terry
May 08, 2014, 10:58 AM
Jer. 29:11
jeffsch's Avatar
Richard, you're right. I couldn't (easily) source the 1/2" foam so am going with thinner foam (Model Plane Foam actually). Looking forward to seeing some other builds!
May 08, 2014, 11:05 AM
Jer. 29:11
jeffsch's Avatar

1/4" foam build progress


Glued the bottom onto the pod; saving the top until after the wing is in and servo wires are run.

Glued a chunk of pink insulation foam onto the front of the pod and shaped into a nose cone. It takes longer for the glue to dry than it does to shape the foam blank, and the results are quite satisfying.
May 08, 2014, 12:19 PM
Registered User
RJD1234's Avatar
Terry, Jeff - thanks for the replies!! It would be great if a build thread was presented as per the plans. But this is cool too.


Quick Reply
Message:

Thread Tools