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Author Topic: New Build  (Read 4472 times)

Offline jfv

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New Build
« on: June 24, 2015, 07:41:13 PM »
Thought I'd share some pic's of my new build.  First flights at Brodak Wednesday evening.  My 3rd pattern with it was the 1st round of competition on Friday.  Very happy how it flies.

500 in2 wing area, Arrowind 2820-07 for power.
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Jim Vigani

Offline Keith Renecle

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Re: New Build
« Reply #1 on: June 24, 2015, 11:59:34 PM »
Hi Jim,

Wow.........that is neat! Nice colour scheme and good finish as well. Would you mind sharing some more details please? I gather you are using a 4 cell lipo, but what size? The prop also looks interesting and let us know how you hide all of the "plumbing" in the cheek cowl. What esc/timer etc.? Thanks very much.

Keith R
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Keith R

Offline jfv

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Re: New Build
« Reply #2 on: June 25, 2015, 04:02:57 AM »
Keith:

Battery was originally a Zippy Compact 4S – 2450 mAh pack but switching to a TP 4S 2700 mAh Pro-Lite pack.  Gives me more reserve on the pack at an ounce lighter weight.  Timer is a Hubin FM-9.  ESC: Phoenix 45.  The hatch is a fiberglass shell.  Slips on a plywood clip and held in place with a small screw.  I modified an Arm-Safe plug to accept a male Deans plug.  The female Deans battery plug just plugs in.  No dangling wires.  The prop is one of Alan Resinger’s 11x5.5 pusher props.  An excellent prop by the way.  Well worth the money.

Wing was built using modified Dee Rice composite construction as outlined in the May 2009 issue of Flying Models.  Built over a foam core using carbon tow ribs and vertical grain balsa shear web.  All the foam is removed after glassing.
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Offline Frank Imbriaco

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Re: New Build
« Reply #3 on: June 25, 2015, 05:36:27 AM »
Jim:
One sharp looking plane ! Hope to soon  see it fly.

Frank
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Offline bruce finley

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Re: New Build
« Reply #4 on: July 01, 2015, 12:11:47 PM »
Quote from: jfv on June 25, 2015, 04:02:57 AM
Keith:

Battery was originally a Zippy Compact 4S – 2450 mAh pack but switching to a TP 4S 2700 mAh Pro-Lite pack.  Gives me more reserve on the pack at an ounce lighter weight.  Timer is a Hubin FM-9.  ESC: Phoenix 45.  The hatch is a fiberglass shell.  Slips on a plywood clip and held in place with a small screw.  I modified an Arm-Safe plug to accept a male Deans plug.  The female Deans battery plug just plugs in.  No dangling wires.  The prop is one of Alan Resinger’s 11x5.5 pusher props.  An excellent prop by the way.  Well worth the money.

Wing was built using modified Dee Rice composite construction as outlined in the May 2009 issue of Flying Models.  Built over a foam core using carbon tow ribs and vertical grain balsa shear web.  All the foam is removed after glassing.


Jim, would happen to have a reprint of that article "modified Dee Rice composite construction as outlined in the May 2009 issue of Flying Models"?

Your work looks awesome!

Bruce
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Offline jfv

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Re: New Build
« Reply #5 on: July 01, 2015, 05:28:57 PM »
Yes, I'll PM you a copy.  If I get permission, I'll post it here.

The pictures show the basic concept.  Foam core with vertical grain balsa shear web.  CF Tow ribs and spar cap.  Sheet with balsa, glass with 0.75 oz cloth, then remove foam.  You do need to use Fiberglast System 2000 Epoxy Resin.  It's a high strength, room temperature curing resin.
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Offline Mark Scarborough

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Re: New Build
« Reply #6 on: July 01, 2015, 07:42:09 PM »
do you know the pre-finish weight of the wing?
thanks
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Offline jfv

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Re: New Build
« Reply #7 on: July 01, 2015, 09:14:55 PM »
Mark:

I don't have the pre-finished weight because I chose to prime and sand the main wing panels before I removed the foam.  Dee Rice reports his Oriental Plus wing complete with wingtips, bellcrank, leadouts, adjustable leadout guide, pushrod, control horn, flaps, and weight box weighs 13.15 oz ready for primer.
« Last Edit: July 01, 2015, 11:27:03 PM by jfv »
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Jim Vigani

Offline Keith Renecle

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Re: New Build
« Reply #8 on: July 01, 2015, 10:59:32 PM »
Hi Jim,
Thanks for all of the info. That is such a neat job, so well done on building such a neat looking model!

Keith R
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Offline jfv

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Re: New Build
« Reply #9 on: July 01, 2015, 11:24:53 PM »
Thanks Keith.  I really love designing and building.  Always a contest between you and the material.
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Jim Vigani

Offline Target

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Re: New Build
« Reply #10 on: July 10, 2015, 11:09:17 AM »
That is some awesome wing construction.
I have always been interested in doing a vacuum bagged composite wing.
If you are going to remove the foam anyhow, then you could use heavier 25psi blue foam, and also get the base coat of color in the finish.
If I get really ambitious, maybe I will try that.
Your work is beautiful, I love sanitary wiring!

Chris
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Offline jfv

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Re: New Build
« Reply #11 on: July 10, 2015, 05:47:38 PM »
Thanks Chris.  You can thank Dee Rice for the concept.  I jusy tweaked it a bit.  Used 1/20" balsa skin with a fiberglass viel on the inside and .75 oz cloth on the outside.  Fiberglass was positioned with the weave at 45 degrees for torsion resistance.  I've just completed the design of my next one; all composite wing and fuselage.  Working on the wing mold.  Skin will be vacuum bagged.  Looking to get reasonable weight with a hard ding resistant surface.  Will be fun experimenting with different layups.  Dee's concept of using the carbon tow ribs works well and provides a lot of options.  I'll be using them on the new wing.
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Jim Vigani

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