Q-40 Racing Discuss AMA 422 and any other variants of Quarter 40 racing

AR-6 Construction Thread

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Old 01-27-2013, 02:57 PM
  #126
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Default RE: AR-6 Construction Thread

The completed model weighed in about 2 ounces over the minimum.
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Old 01-27-2013, 03:02 PM
  #127
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Default RE: AR-6 Construction Thread

The AR-6 is now complete and ready for the test flights.

Many thanks to Lee Lavalley, Kevin Matney, Gary James, and others that helped make this come together![8D]
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Old 01-28-2013, 05:59 AM
  #128
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Default RE: AR-6 Construction Thread

Looks great Scott.. Can't wait to hear how it flies..

Thanks for all the work you did on the build thread, very good info..
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Old 02-03-2013, 02:03 PM
  #129
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Default RE: AR-6 Construction Thread

In the following pictures Lee's prototype fuselage got a new motor mount, wing, and horizontal tail surface.
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Old 02-09-2013, 06:38 PM
  #130
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Default RE: AR-6 Construction Thread

The surface of the fuselage was washed with Dawn dish soap to remove traces of engine oil. The fuselage was then sanded with 220 grit sandpaper. The fuselage was cleaned with a dry cloth.


White KlassKote epoxy primer was sprayed on the surface of the model.
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Old 02-10-2013, 10:26 AM
  #131
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Default RE: AR-6 Construction Thread

The primed surface was lightly sanded and cleaned.

This model was painted with acrylic enamel (Speed Yellow) paint and set out of the way to dry.
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Old 02-13-2013, 02:05 PM
  #132
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Default RE: AR-6 Construction Thread

Below are pictures showing after the black trim (Krylon) was applied.

Wet sanding was next.

Wait a couple days for the Krylon to dry before spraying clear coat on.
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Old 02-13-2013, 02:47 PM
  #133
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Default RE: AR-6 Construction Thread

looks fast!
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Old 02-15-2013, 11:32 AM
  #134
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Default RE: AR-6 Construction Thread

The following pictures show the model with more lettering.

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Old 02-15-2013, 02:31 PM
  #135
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Clear coat was applied to the fuselage in these pictures.

It was 40F outside and the cold temperatures make it difficult to apply the clear coat without running.

I mixed the clear coat per the directions and then added about 1/3 the volume of fast reducer.

A light mist was applied to the surface and then the model was set out of the way for about 10 minutes to dry.

Several more light coats were applied until the surface had a uniform luster, indicating it had covered the paint.

It was then set out of the way to dry.

The small spray gun worked well, considering the conditions. It is normally available at Harbor Freight at around $15.
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Old 02-15-2013, 03:07 PM
  #136
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Default RE: AR-6 Construction Thread

Hey can't wait to see these birds in person!!!
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Old 02-15-2013, 05:21 PM
  #137
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Default RE: AR-6 Construction Thread

Scott,
Looking good
How many planes you bringing to the Basin?
You have an entire team there.
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Old 02-15-2013, 05:43 PM
  #138
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I'll bring 3 racers to the Basin:

One AJ-2 and two AR-6.

I hope to see you in others in a few days. Have a safe trip!
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Old 02-16-2013, 10:52 AM
  #139
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Default RE: AR-6 Construction Thread

The yellow Endeavor is now clear coated and polished.

Next is re-installing the radio, engine, and landing gear.

The other two models (AJ-2 and AR-6) have been test flown. The Endeavor will be tested in California.
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Old 02-16-2013, 10:55 AM
  #140
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Default RE: AR-6 Construction Thread

wow on the carpet inside the house Scott?
I could never get away with that!!
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Old 02-17-2013, 03:46 AM
  #141
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Default RE: AR-6 Construction Thread

The model was finished last night.

Now is the fun part, loading.

I should be on the road shortly.
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Old 02-17-2013, 02:52 PM
  #142
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safe travels, Scott - have fun!
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Old 02-23-2013, 05:59 PM
  #143
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Good Luck in Calie,
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Old 02-24-2013, 05:40 AM
  #144
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Default RE: AR-6 Construction Thread

The weather was beautiful here most of the week.

I've made this a racing vacation and had a great time![8D]
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Old 05-27-2013, 02:14 PM
  #145
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Default RE: AR-6 Construction Thread

Here's another AR-6 wing on the build.

A friend of mine cut a pair of slots for front spars using a radial arm saw. The primary function of the spars is to reinforce the landing gear block area.
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Old 05-27-2013, 02:23 PM
  #146
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Default RE: AR-6 Construction Thread

The following pictures shows the fabrication of the wing skins. I like to build both sides of the wing at the same time.

1) Begin by making a full set of skins.

2) Tape them together so that there is a fold at the wing trailing edge.

3) Tack on a piece of carbon fiber laminate using 3M77.

4) Lay a piece of 1.6 ounce fiberglass cloth over the surface.
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Old 05-27-2013, 02:29 PM
  #147
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Default RE: AR-6 Construction Thread

The rear carbon fiber spar and wood spars were glued in place using finishing epoxy.
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Old 05-27-2013, 02:31 PM
  #148
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Mix an ounce of finishing epoxy and add approximately 10% (a cap full) of 91% alcohol.

Immediately spread the mix on one side of the wing using a plastic squeegee.

Mix another ounce of finishing epoxy and cover the other side the same way.
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Old 05-27-2013, 02:40 PM
  #149
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Default RE: AR-6 Construction Thread

Place the wing cores on the bottom skins and fold the top skins over.

Adjust the cores until they fit properly on the skins and them place them between the shucks.

Pin the parts in place and then follow with masking tape.

Place parts in the vacuum bag and turn on the pump. Mine is set to pull about 6" of vacuum.
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Old 06-08-2013, 09:19 AM
  #150
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Default RE: AR-6 Construction Thread

The cores were trimmed and removed from the shucks.

Double check the dimensions before doing the final trimming.

A balsa leading edge was glued on with Gorilla Glue.

Dampen the surfaces with water prior to gluing.

Apply a thin bead as the glue expands to fill the void.

The leading edge is temporarily held in place with masking tape until the glue dries
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