HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Jan 17, 2013, 12:36 PM
Registered User
Whiplash46's Avatar
Maryland
Joined Jul 2007
42 Posts
Build Log
7 meter Stanley Nomad Build

This will be my first build log. My bench has been covered in other projects unrelated to airplanes for over 3 years now, far to long. Time to get back to the JR Aerotow in 2013, hopefully with a completed Nomad. The one-of-a-kind Nomad was built by Robert Stanley over a period of years in the late1930s and flown in the National Soaring Event in Elmira NY in 1938 & 39. The only Nomad ever built now hangs in the National A&S, Udvar-Hazy Center near Washington DC. Unfortunatley, the location in the gallery where the Nomad hangs does not make picture taking very easy. If anyone happens to have additional information, specfic to the Nomads use of spoilers, airbrakes etc. I would appreciate a post with details since my inquires to the A&S have not been answered.

Parts cutting has begun, this will be a fairly basic wooden build the intent is to keep the structure very simple thus maybe able to complete over the next few months.

Nothing like a Dead-Line to get one motivated!

General model specs are:
Span - 22.2ft (6.8 m) ~40% scale
Length - 7.9ft (2.4 m)
Estimated Flying Weight - 20 lbs
Controls - Semi Flying V-Tail, Ailerons, Spoilers
Airfoil - NACA 23018 root, 23012 tip (these are scale why change them)
Whiplash46 is offline Find More Posts by Whiplash46
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 17, 2013, 12:39 PM
Registered User
United States, KY, Taylorsville
Joined Mar 2010
1,758 Posts
EXCELLENT choice! Can't wait to see it at the upcoming JR!
ARUP is offline Find More Posts by ARUP
Reply With Quote
Old Jan 17, 2013, 01:35 PM
Less Whinning, More Flying
Sailhigh's Avatar
SF Bay Area, USA
Joined Feb 2003
1,777 Posts
Nice looking subject. Looking forward to the progress.
Sailhigh is offline Find More Posts by Sailhigh
Reply With Quote
Old Jan 17, 2013, 02:10 PM
Vintage wood is the best!
SZD16's Avatar
In a house
Joined Sep 2002
2,851 Posts
Quote:
Originally Posted by Whiplash46 View Post
Airfoil - NACA 23018 root, 23012 tip (these are scale why change them)
Because this is a model and not full size.......
SZD16 is offline Find More Posts by SZD16
Reply With Quote
Old Jan 17, 2013, 02:21 PM
-----
Woodstock 1's Avatar
Ireland, County Kerry, Kerry
Joined Dec 2005
6,994 Posts
Quote:
Originally Posted by szd16 View Post
because this is a model and not full size.......
+1!
Woodstock 1 is online now Find More Posts by Woodstock 1
Reply With Quote
Old Jan 17, 2013, 02:26 PM
Vintage wood is the best!
SZD16's Avatar
In a house
Joined Sep 2002
2,851 Posts
I would be inclined to use a proven model airfoil.....something like the HQ3518 at the root.....so you can keep it to the same thickness as full size and then taper to HQ3512 at the tip.....here is a overlay of the NACA airfoil and the HQ
NACA = yellow
HQ3518 = blue
HQ3512 = red
You can see just how "fat" the NACA airfoil is....this thing wont penetrate worth a damn and will be down on the ground sooner then the tug....IMO. The HQ airfoils have been designed from the gitgo for models and are used on a wide variety of scale sailplanes.
SZD16 is offline Find More Posts by SZD16
Reply With Quote
Old Jan 17, 2013, 02:30 PM
Vintage wood is the best!
SZD16's Avatar
In a house
Joined Sep 2002
2,851 Posts
One other thing....20lbs?? Not so much...at 40% you are going to need mass for this thing to even fly.....30 - 35 lbs. should be your goal. At 20lbs and with the NACA airfoil I predict that not only will it beat the tug back to the ground but do it in record fashion.
SZD16 is offline Find More Posts by SZD16
Reply With Quote
Old Jan 17, 2013, 10:35 PM
Registered User
Whiplash46's Avatar
Maryland
Joined Jul 2007
42 Posts
Thank you for the airfoil suggestions SZD16. I do have some experience with the 5 series NACA airfoils in powered models up to 12' spans and 25-50 lbs. The 18% root is a monster and your advice to use a proven model section would be a wise choice. Based on the information I can find concerning the full scale Nomad it had exceptional performance for its time. Of course that could be wrong. Robert Stanley was most likely (big guess on my part) inspired to use these sections at the time because they had just been developed and I suppose were state of the aerodynamic art in the mid 1930's. At a minimum, a thinner root section would still allow for a simple and easy to build spar. Thanks for the advice but you have cost me some hours drawing new wing sections.
Whiplash46 is offline Find More Posts by Whiplash46
Reply With Quote
Old Jan 17, 2013, 11:09 PM
Vintage wood is the best!
SZD16's Avatar
In a house
Joined Sep 2002
2,851 Posts
Sorry! I would hate to see you invest time and money into a build that turns out to be a dog....do you have compufoil?
SZD16 is offline Find More Posts by SZD16
Reply With Quote
Old Jan 18, 2013, 01:31 AM
Registered User
Joined Jan 2005
56 Posts
Nomad

Whiplash 46, I would be inclined to go with SZD16, as he has quite some experiance with big gliders. The airfoil you chose may work quite well wirth a power model (while the fan is going) but on a glider it would not have a whole lot of "sayupability", and as for souring... forget it. Even on an aerobatic glider it would be too fat.
Good subject, by the way, guess the other challenge will be the polished ali.
Best wishes
Col
colin collyer is offline Find More Posts by colin collyer
Reply With Quote
Old Jan 18, 2013, 06:58 AM
TEAM HORIZON
Lbuff1's Avatar
Killingworth CT
Joined Nov 2008
2,549 Posts
Looking forward to the progress. I have to wholeheartedly agree with Tom, ( SZD16 ) on the airfoil and weight. Too many times I see guys try to build a very light large scale model sailplane, ( 6m or more ) and then have to add 5 or more pounds of ballast only to get it to fly decent.
Its better to put the weight into the structure.


LEN
www.RcAerotowing.com
www.RcAerotowing.com/forum
Lbuff1 is online now Find More Posts by Lbuff1
Reply With Quote
Old Jan 18, 2013, 07:51 AM
No substitute for aspect ratio
SPasierb's Avatar
Norwalk, CT aka the Nutmeg State -- I just can't seem to find any %$#@! nutmeg here?
Joined Nov 2003
2,263 Posts
Cool build whiplash!

Looking forward to seeing it in Monticello. Will you be coming to the Cumberland MD Spring Soar For Fun in March?

http://www.rcaerotowing.com/forum/sh...d-Soar-for-Fun
SPasierb is offline Find More Posts by SPasierb
Reply With Quote
Old Jan 18, 2013, 09:01 AM
Registered User
Whiplash46's Avatar
Maryland
Joined Jul 2007
42 Posts
I have Compufoil but do not use it. OK, it looks like the HQ foils are the ticket, with some of the under-camber at the trailing edge removed, of course then it is no longer an HQ foil. The ailerons on this bird are big enough to compensate with some down trim, maybe. Cumberland in March would be a good target finish date and it's only 3 hours away. Airfoil discussions never get old, do they? Thanks for the advice everyone and Colin I love Flite-Metal, this thing will need a Ton of it. I found a source for 3" 7 mil AL tape on the web. looks like they sell direct in small quantities http://www.uline.com/Product/Detail/...e-3-x-60-yards
Whiplash46 is offline Find More Posts by Whiplash46
Reply With Quote
Old Jan 18, 2013, 10:42 AM
Vintage wood is the best!
SZD16's Avatar
In a house
Joined Sep 2002
2,851 Posts
Quote:
Originally Posted by Whiplash46 View Post
I have Compufoil but do not use it. OK, it looks like the HQ foils are the ticket, with some of the under-camber at the trailing edge removed, of course then it is no longer an HQ foil.........]
Leave the under-camber....that's what gives it its lift generating properties. HQ airfoils are proven to work time and again in models....Chris Williams uses them pretty much on every model he builds....and he builds A LOT of models! My 40% K8 uses a HQ35XX airfoil and flys like a dream at 35 lbs.........it may not be built very well but it flys fantastically well.
SZD16 is offline Find More Posts by SZD16
Reply With Quote
Old Jan 18, 2013, 02:09 PM
Registered User
mintie's Avatar
Kaiapoi , New Zealand
Joined Jun 2007
599 Posts
come on whiplash48 just take the advise these guys give you , they know what they are talking about and get on with the job in hand.
I to am building a large vintage glider and Chris Willams has suggested to me the aero sections to use and that is what I am going to do.
Models are different to full size.
will be watching your build. cheers
mintie is offline Find More Posts by mintie
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Scratch Build RQ-7 Shadow Composite/Balsa parri0923 Balsa Builders 2 Jan 17, 2013 05:17 PM
Build Log Binder EB29 1/4 scale 7.3 meter scratch build yyz Scale Sailplanes 564 Dec 13, 2010 10:09 AM
For Sale Nomad R/C Car - 7.2V Electric copterklutz Cars - Cars and Parts (FS/W) 4 Aug 22, 2006 03:14 PM