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A tiny scale plane

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17 Apr 2013 20:46 #31 by Ex-Member
Replied by Ex-Member on topic A tiny scale plane
ooooooooooooooooooooooh nice.
i feel a 108" version brewing in my mind.
have to steal your plans one day. he he he :P

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20 Apr 2013 23:57 #32 by Quorneng
Replied by Quorneng on topic A tiny scale plane
Started cutting out the wing skins.

The NACA 24xx wing section has no flat bottom anywhere so its a bit harder to make, particularly if the scale 2 degrees washout is included! :ohmy:
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Thanks: Eric, Dean M, Ex-Member, Sarah-Jane Smith

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21 Apr 2013 23:01 #33 by Quorneng
Replied by Quorneng on topic A tiny scale plane
Slowly making progress.
The LH wing ribs, tops spar and front skin.

Like this it is rigid enough to allow the aileron to be cut out and the LE too be fitted and sanded to shape. .
So far it weighs 1oz. (28g)
Then the RH wing has to be completed to the same standard. Should be a bit easier as all the parts are already cut out..
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Thanks: Dean M, Ex-Member, Sarah-Jane Smith, old fart

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24 Apr 2013 12:42 - 24 Apr 2013 12:44 #34 by Quorneng
Replied by Quorneng on topic A tiny scale plane
As I am also stripping, repairing and polishing a dressing table and wardrobe progress is slow.

Originally it was dark stained - very fashionable in the 1920s?

The RH wing now has its ribs and shear webs added ready for the leading edge sheeting and the top spar flange.

The next design issue is the construction of the booms.
So far I have used glass fibre tube for such things which are almost unbreakable but on the heavy side and anyway would not be the correct profile for the Cessna.
Maybe a bit of experimenting is required..
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Last edit: 24 Apr 2013 12:44 by Quorneng.
Thanks: Sarah-Jane Smith

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24 Apr 2013 12:49 #35 by old fart
Replied by old fart on topic A tiny scale plane

Quorneng wrote: As I am also stripping, repairing and polishing a dressing table and wardrobe progress is slow.


Originally it was dark stained - very fashionable in the 1920s?


Which servos will you use? ;)

There is nothing like a dream to create the future.

Electrickery is the work of the devil.
Thanks: Klipkopwildlife, Sarah-Jane Smith

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26 Apr 2013 18:07 #36 by Quorneng
Replied by Quorneng on topic A tiny scale plane
The wardrobe is still taking quite a bit of time
The aileron completed and the servo installed.

Who needs low profile servos when you mount them on their side. ;)
The tail boom has to be installed next as the servo cable has to run across it.
Attachments:
Thanks: Eric, Klipkopwildlife, Dean M, Ex-Member, Sarah-Jane Smith, old fart

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27 Apr 2013 21:52 #37 by Quorneng
Replied by Quorneng on topic A tiny scale plane
After a bit of thought I will try the booms in Depron.
They are quite a 'tall' oval so can be made up from a hollow box with bulging sides and sanded to shape top and bottom.

The long centre 'rib' prevents the sides squashing in.
The boom overlaps the top and bottom of the spar.

The boom and wing.

The elevator servo wire will run inside the boom which will be 'interesting' to do!
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Thanks: Eric, Klipkopwildlife, Dean M, Sarah-Jane Smith, old fart

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28 Apr 2013 11:55 #38 by Quorneng
Replied by Quorneng on topic A tiny scale plane
Its just a well the O-2 has two booms and I built only one as it means I can 'build in' the elevator servo wire into the other one! :lol:

The boom is so narrow at the tailplane end that even a 32AWG servo wire has to lie flat. :ohmy:

It seems rather strange to completely assemble the wings and tail before even starting the fuselage. ;)
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Thanks: Klipkopwildlife, Dean M, Sarah-Jane Smith, old fart

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29 Apr 2013 12:03 #39 by Quorneng
Replied by Quorneng on topic A tiny scale plane
The wardrobe is finished so things move a little quicker but not much!
The wing and tail booms complete.

Next the tail plane with the elevator servo built into the centre of it.
This will then allow the wing skin to be completed.
Attachments:
Thanks: Eric, Klipkopwildlife, Dean M, Ex-Member, Sarah-Jane Smith, old fart

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29 Apr 2013 12:31 #40 by Grumpy42
Replied by Grumpy42 on topic A tiny scale plane
your builds are always high quality and always interesting Q - If there was nothing else on this forum I'd still come here just to follow them.

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29 Apr 2013 23:43 #41 by Quorneng
Replied by Quorneng on topic A tiny scale plane
Grumpy42
Thank you for thee kind sentiments - much appreciated.

Moving on a bit faster - the wing, booms and tail complete with control surfaces added.

Attachment WingTail.JPG not found


Just the wing tips to add.
There is a bit of detail finishing to do. With the servos installed it weighs 5.1oz (145g). Hopefully it will be about 17oz all up.
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Thanks: Eric, Klipkopwildlife, Dean M, Grumpy42, Sarah-Jane Smith

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30 Apr 2013 02:26 #42 by Grumpy42
Replied by Grumpy42 on topic A tiny scale plane
G'Day Quorneng - the comments were meant whole heartedly - After seeing your builds I'm even tempted to try using foam myself however I'm not sure what sort of marriage I'll get between the foam and my nitro engines - any recommendations or suggestions? I'd probably start off with something of a size to be powered by one or perhaps two of my Cox engines - say my Cox .051 Black Widows - they run 20% nitro!.

He, he, he I can hear the Gasser sobbing from here. :evil: :evil: :evil:

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30 Apr 2013 14:32 #43 by Quorneng
Replied by Quorneng on topic A tiny scale plane
Grumpy42
I would indeed advise small.
Foam in general and Depron in particular is not a direct substitute for wood and only at the lighter end of the spectrum does it have real advantage.
I am not sure how well Depron reacts to glow fuel although there are IC foamies that seem to manage with a sticky tape covering, claiming it just wipes clean.
Foam is cheap. The Cessna so far has not quite used 1 Depron sheet that's £2.99. The glue costs as much as that!

.

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30 Apr 2013 16:18 - 30 Apr 2013 16:19 #44 by Eric
Replied by Eric on topic A tiny scale plane
The wings on my 66" plastic ducted fan U2 bend noticeably when I loop it (not a scale manoeuvre!) so I wouldn't go bigger than say five feet span for an oil-burner, or you might find it flapping faster than an frightened pigeon being chased by a Falcon!

if you are calm and collected when all about you are going berserk - you've missed something important!
Last edit: 30 Apr 2013 16:19 by Eric. Reason: forgot a bit!

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03 May 2013 23:14 - 03 May 2013 23:15 #45 by Quorneng
Replied by Quorneng on topic A tiny scale plane
Now the beautiful weather has passed I can make start on the fuselage.

It is surprisingly big.
Like the late Libelle built as a planked half shell and then the other side added on to it.
I am making up some of the design features as I go along however one feature now fixed is for the complete canopy section be removable for access to the battery.
.
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Last edit: 03 May 2013 23:15 by Quorneng.
Thanks: Eric, Klipkopwildlife, Dean M, Grumpy42, Ex-Member, Sarah-Jane Smith

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