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« on: June 09, 2016, 08:44:31 PM »
K K Iyer
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Hi everyone,

Too hot to fly. Too windy to fly. No field to fly in. Illegal to fly.
So what can an old aeromodeller do?

Build a small rubber powered model!
Inspired by the build quality of Mike Stuart (ffscale.co.uk), Walt Mooney, Dave VTO Linstrum, Steve WMD (outerzone)

Since my printer died, can't print plans, so make do with rough measurements from pdfs saved in ibooks!
Making outline drawings, then designing the structure based on own experience...

Started on 1st June. Today (9th), got the Pilatus flying inside the house.

Yet to build the undercarriage, wing struts, lettering etc.
17gms with prop and a little rubber. Will end up around 22gms with U/C, more rubber, nose wt etc.
Span 15", chord 2", length ~9"

Will post build details/problems/pics if anyone is interested.
Regards.

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A small Pilatus Porter
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« Reply #1 on: June 09, 2016, 08:58:04 PM »
sanjayrai55
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Re:

Cute! Pretty good for an old old aeromodeller

Sent from my Mi 4i using Tapatalk
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« Reply #2 on: June 09, 2016, 09:02:14 PM »
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Great build sir Hats Off
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« Reply #3 on: June 09, 2016, 09:19:39 PM »
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That is some neat build , i miss these types of posts now a days . if i had it i would have put a 5 gram brushless ,all in one rx and 1s lipo .
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« Reply #4 on: June 09, 2016, 09:52:29 PM »
K K Iyer
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@sanjayrai55,
Before I had even posted the msg, RC Aunt asked me 'Rai Saheb ka jawab nahin aya?'

Aa gaya. Thanks.
Thanks to Tarneil too.

Now I have an excuse to bombard the forum with inconsequential details!
So here goes...

Outline drawing made from approx dimensions from outerzone/Dave Linstrum/peanut

Now Peanuts can't exceed 13" span, and need 1/16sq wood.
That's too fine for an oldie to handle.
So made it 15" span.
And took 2mm sheet (from gajjark) and stripped 2mm sq.
Fuselage sides in 2mm sq looked gross, so sanded them down.
A syringe with 1cc of CA lasts only an hour or so before it clogs up...

(Refuses to take 2 pics in one post!)

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Re: A small Pilatus Porter
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« Reply #5 on: June 09, 2016, 10:07:30 PM »
K K Iyer
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@vineet,
About adding RC, you may like to see my OLD threads on TLG1 (FF) and RG TLG...

Adding one pic at a time

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Re: A small Pilatus Porter
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« Reply #6 on: June 09, 2016, 10:14:11 PM »
K K Iyer
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How to ensure fuselage is square without a jig?
Use desi jugaad.

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« Reply #7 on: June 09, 2016, 10:19:17 PM »
K K Iyer
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Then you stick the sides together...

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« Reply #8 on: June 09, 2016, 10:23:20 PM »
K K Iyer
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With fuselage, stab and fin done, cut the ribs..

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Re: A small Pilatus Porter
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« Reply #9 on: June 09, 2016, 10:31:24 PM »
K K Iyer
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Wings didn't seem stiff enough, so added truss...

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« Reply #10 on: June 09, 2016, 10:50:52 PM »
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I Love this build log....
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« Reply #11 on: June 10, 2016, 11:08:32 AM »
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Waiting for the video Iyer sir  Cool
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« Reply #12 on: June 10, 2016, 09:07:19 PM »
K K Iyer
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Learnt/relearnt several lessons:
1. Don't use old tissue. Get fresh.
2. Check grain of tissue. Turned out to be along thr shorter side of the sheet. Wrong orientation resulted in tail/fin covering being not fully taut. Far better result on fuselage with grain lengthwise.
3. Gum that comes in a transparent container that looks like a felt pen worked fine for attaching tissue. Has to dry fully, else will loosen during water spray.
4. Colin bottle spray not fine enough for water shrinking of tissue. Reverted to age old method (dip toothbrush in water, shake it to get rid of almost all the water, then strum the bristles with your thumb to get a fine spray.
5. Don't use old thinner, get fresh. My old thinner made cotton wool like clouds in the dope, which i stirred and stirred till i got a slightly milky colour instead of a honey colour. Thought the thinner was a year or two old. Looked up the label just now and found mfg date of Dec 2009! How time flies...
6. Water shrink / dope one wing panel at a time. Pin over packing at corners till fully dry, to avoid unintended warps / introduce washout. (Notice excessive washout in right wing? Had to be corrected in second coat.
7. For such a small model, thin the dope a lot. 50:50 was too thick.
8. Incorporate some method of adjusting incidence / fin alignment. Notice groove in fuselage for fin widened and packing added to correct slight right rudder
9. Such models apparently have the wings glued to the fuselage. Didn't dare. So used rubber bands to retain wing at the cost of some weight penalty.
10. Peck Polymers 6" prop was grossly out of balance. Needed 5" of black tape to balance!

Better stop now. This post/thread seems like a soliloqy of a rambling old man...

Next post will be after i figure out a detachable undercarriage, and then to test flying...

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« Reply #13 on: June 10, 2016, 09:20:01 PM »
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Great going sir. As short as an iPad! Stimulates me  Smiley to try my own! 👍🏻
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« Reply #14 on: June 10, 2016, 09:28:23 PM »
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I still haven't assembled my "Flying Machine" After I bought it, didn't care to assemble because I became passionate on RC flying Smiley

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« Reply #15 on: June 11, 2016, 03:39:07 PM »
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Sir; great going. I am on a excursion and got 2g airtel signal right now. I'll be back on the 13 and will get back with the measurements you have asked for.
Regards
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« Reply #16 on: June 15, 2016, 10:36:28 PM »
K K Iyer
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15" span, 9" length, 17gms with about ~2gms rubber.
12" loop of 1/8" Super Sport rubber, 6" Peck prop, ~120 turns.
Outside wind speed around 10-20 knots all day, so stuck indoor.


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« Reply #17 on: June 15, 2016, 10:47:49 PM »
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Flies good👍🏻👍🏻... Waiting for maiden outdoors..
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« Reply #18 on: June 16, 2016, 10:53:29 AM »
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Iyyer sir, good flight

Lighter note...
Nice target practicing.  Wink
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« Reply #19 on: June 18, 2016, 06:28:41 PM »
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Nice one sir  Clap

What is a Peck prop?
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« Reply #20 on: June 18, 2016, 08:15:22 PM »
K K Iyer
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Thanks SI74, Prabal, Manoj, Rai saheb.

@sanjayrai55,
Sir,
Peck Polymers (now has a new owner) is one of the old established (1971) suppliers of rubber power models and accessories. Attached pic of what I got.

@prabal276,
http://www.rcindia.org/kites-trains-free-flight-and-all-others/guillows-pilatus-pc-6-porter-kit-304-build-log/
What happened to your Pilatus?
If you have no time to spare, and need someone to build it for you... (Hint, hint  Grin)
I have 195ml of dope, 490ml of thinner, and a nice soft brush left over from my build!

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Re: A small Pilatus Porter
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« Reply #21 on: June 19, 2016, 12:09:40 AM »
sundaram
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Inspired to make one RC powered following you sir. Awesome build and nice flight. Need to learn the dope and tissue technique from you. Got a lot of balsa scrap still left.
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« Reply #22 on: July 01, 2016, 07:48:43 AM »
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Sir;
the pilatus is gathering dust.
I have been doing a balsa build. Its for the school. They wish to get a solar aircraft for some silly competition, and i am doing that right now.
will be posting a thread once succesful.
Thanks for the offer but; i will commence on the pilatus after my fa2 test series.
Regards.
since ; i get to keep the plane myself; ill strip it off its electronics and will rcfy the pilatus
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« Reply #23 on: January 07, 2017, 08:53:04 PM »
K K Iyer
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Wants to go out, I think...


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« Reply #24 on: January 07, 2017, 09:44:45 PM »
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Great test flights KK.

Seems more than trimmed and ready for a proper outdoor session.

Where did you source your Peck prop.

In my search for carbon rods came across this firm

www.aeroncomposite.com

Has a range of rods, tubes, sheets, fabric etc and a large range of propellers.

Prices on higher side compared to carbon rods I got from RC Bazaar, but range of stuff is wide.

Who all coming for Outdoor Nationals at Udaipur

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