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Search: Posts Made By: jp1961
Showing results 1 to 12 of 12
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Forum: Composites Fabrication And Repair
10-07-2013, 02:50 PM
Replies: 47
Views: 8,062
Posted By jp1961

Gary, West system epoxy sells a small...

Gary,

West system epoxy sells a small booklet called vacuum bagging techniques. *It's a pretty good reference on getting started in vacuum bagging. * The initial cost can be high (vacuum pump...
Forum: Composites Fabrication And Repair
10-05-2013, 08:21 PM
Replies: 47
Views: 8,062
Posted By jp1961

Gary, Balsa is the lightest wood you can use...

Gary,

Balsa is the lightest wood you can use for skinning a foam wing. Obeche is used in europe, because either they can't get balsa or it's too expensive. *From a weight perspective here is a...
Forum: Composites Fabrication And Repair
10-04-2013, 03:58 PM
Replies: 47
Views: 8,062
Posted By jp1961

pic of the engine

pic of the engine
Forum: Composites Fabrication And Repair
10-04-2013, 01:31 PM
Replies: 47
Views: 8,062
Posted By jp1961

I picked up two cans of 3M Polystyrene spray...

I picked up two cans of 3M Polystyrene spray adhesive (#78) from Menards for 10.99 each. *One can was barely enough to attach the Birch veneer to my wings. *Each wing is 31" long (62 total), 17" wide...
Forum: Composites Fabrication And Repair
10-03-2013, 02:30 PM
Replies: 47
Views: 8,062
Posted By jp1961

I not sure if 1/64 birch plywood would weigh more...

I not sure if 1/64 birch plywood would weigh more than .023" birch veneer, i suspect the glue used to laminate the plywood would add considerable weight. *Prices based on a 4' x 8' sheet are as...
Forum: Composites Fabrication And Repair
10-03-2013, 12:55 PM
Replies: 47
Views: 8,062
Posted By jp1961

An*excellent*book on the topic of making foam...

An*excellent*book on the topic of making foam core wings is "Radio Control Foam Modelling" by David Thomas. *Shows all sorts of tips and*techniques, paperback. I don't think foam core wings will ever...
Forum: Composites Fabrication And Repair
10-02-2013, 11:11 PM
Replies: 47
Views: 8,062
Posted By jp1961

The wingspan is 63", wing area 1080 sq inches....

The wingspan is 63", wing area 1080 sq inches. Woodcraft sells Birch veneer in 4' x 8' sheets rolled into a tube and they will ship to your house. *When I glued the veneer on, as I rolled the foam...
Forum: Composites Fabrication And Repair
10-02-2013, 03:02 PM
Replies: 47
Views: 8,062
Posted By jp1961

I forgot to mention a Homelite 25 cc weighs 4.5...

I forgot to mention a Homelite 25 cc weighs 4.5 pounds with prop and spinner so some of that 14.5 pounds is engine.
Forum: Composites Fabrication And Repair
10-02-2013, 02:28 PM
Replies: 47
Views: 8,062
Posted By jp1961

This plane came out at 14.5 lbs. *It...

This plane came out at 14.5 lbs. *It is*underpowered with a Homelite 25cc but it does fly. *I could have shaved 2 possible even 3 pounds if I did away with the wing tube, used a solid block of 4"...
Forum: Composites Fabrication And Repair
10-02-2013, 02:04 PM
Replies: 47
Views: 8,062
Posted By jp1961

Here is a pic of the wing and finished airplane ...

Here is a pic of the wing and finished airplane

Jeff
Forum: Composites Fabrication And Repair
09-30-2013, 08:45 PM
Replies: 47
Views: 8,062
Posted By jp1961

Gary, I used a standard 1.25" aluminum tube...

Gary,

I used a standard 1.25" aluminum tube you'd find at a hardware store or Home Depot. *Since I couldn't find a cardboard tube to snugly fit over it, I made a tube out of fiberglass and West...
Forum: Composites Fabrication And Repair
09-30-2013, 02:05 PM
Replies: 47
Views: 8,062
Posted By jp1961

i used Birch veneer (.023") from Woodcraft to...

i used Birch veneer (.023") from Woodcraft to sheet the wing of a fairly large profile plane with EXCELLANT results. Used 3M Polystyrene foam adhesive (#78) to attach the veneer to the foam. *I used...
Showing results 1 to 12 of 12


 
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