Aeromodellers Forum

Just Junior

  • Klipkopwildlife
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16 Jul 2019 17:16 #16 by Klipkopwildlife
Replied by Klipkopwildlife on topic Just Junior
I find Poly C just as good as Epoxy and much lighter!
Do it now, you may never get another chance

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16 Jul 2019 19:44 #17 by paul d
Replied by paul d on topic Just Junior
Thanks Klip, I've soaked the lower cowl etc in "Eze dope" it's fuel proof and it acts as a effective sanding sealer, the removable upper cowl has had a thick coat of epoxy ( more sanding!). I'm going to cover it all in "litespan" again it's fuel proof then the front end will have a paint scheme applied so it should be ok......learnt my lesson years ago when the engine on a particularly old tatty and fuel soaked free flight fell off when I started it!!!
balsa is best.

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16 Jul 2019 23:21 #18 by supertigrefan
Replied by supertigrefan on topic Just Junior
I'm impressed with how neatly you cut that hole in the cowl, what's your secret Paul?
Stay low, Move fast, Trust no-one....

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17 Jul 2019 06:18 #19 by paul d
Replied by paul d on topic Just Junior

supertigrefan wrote: I'm impressed with how neatly you cut that hole in the cowl, what's your secret Paul?

Bit of tube with a sharpened edge!
balsa is best.

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18 Jul 2019 15:01 #20 by paul d
Replied by paul d on topic Just Junior
laid up the wing main spars this Morning, plan called for 3/16 x 9/16ths hard balsa, I've used 3/16x3/8 balsa laminated to a piece of 3/16ths square spruce, balsa will be at the top in compression, spruce at the bottom in extension.
If the original j60 had a fault it's that the wings could potentially "clap hands" this mod along with the ply dihedral brace should help.
The ribs only 16th quarter grain sheet with a sheet trailing edge and shear webs, a rather weedy 18th square sub spar with a sheeted (top only) leading edge.
balsa is best.
Thanks: Eric, Klipkopwildlife, THE BLACKBIRD

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18 Jul 2019 16:11 #21 by Quorneng
Replied by Quorneng on topic Just Junior
paul d
Balsa has a higher (about 40%) strength in tension than compression.
On this basis perhaps your spars should be the other way around. ;)

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29 Jul 2019 19:39 - 29 Jul 2019 19:41 #22 by paul d
Replied by paul d on topic Just Junior
double post
balsa is best.
Last edit: 29 Jul 2019 19:41 by paul d. Reason: no pictures

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29 Jul 2019 19:40 - 29 Jul 2019 19:45 #23 by paul d
Replied by paul d on topic Just Junior
A bit of further progress on this project, wings are now complete except for shaping the root fairing, after Q's comment I made up a test spar and found with the spruce cap strip up it was marginally stronger.

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balsa is best.
Last edit: 29 Jul 2019 19:45 by paul d.

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29 Jul 2019 19:47 - 29 Jul 2019 19:59 #24 by paul d
Replied by paul d on topic Just Junior
triple post!!! soz...
balsa is best.
Last edit: 29 Jul 2019 19:59 by paul d.

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29 Jul 2019 19:49 - 29 Jul 2019 19:51 #25 by paul d
Replied by paul d on topic Just Junior

That's better! kit of parts above.
balsa is best.
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Last edit: 29 Jul 2019 19:51 by paul d.
Thanks: Klipkopwildlife, Quorneng, crash happy

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29 Jul 2019 19:54 #26 by paul d
Replied by paul d on topic Just Junior
Tail feathers covered and awaiting the hinges.

made a start on covering the fuselage, it's easier to cover the whole side then cut out the window appeture etc.
balsa is best.
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Thanks: Klipkopwildlife, crash happy

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29 Jul 2019 19:56 #27 by paul d
Replied by paul d on topic Just Junior
finally I've bushed the wheels to suit and made up the aluminium hub caps.

balsa is best.
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Thanks: Klipkopwildlife, Quorneng, THE BLACKBIRD, crash happy

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30 Jul 2019 10:08 #28 by Klipkopwildlife
Replied by Klipkopwildlife on topic Just Junior
Looking good Paul, I always like seeing them naked![badass]
Do it now, you may never get another chance
Thanks: paul d

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30 Jul 2019 18:23 #29 by Ralpharr2001
Replied by Ralpharr2001 on topic Just Junior
Lovely build Paul. Very clean and tidy.
I'm currently unsupervised. I know it freaks me out as well, but the possibilities are endless!!

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30 Jul 2019 18:35 #30 by paul d
Replied by paul d on topic Just Junior
Cheers Ralph, means a lot that from someone so gifted.
balsa is best.

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