Thread Tools
This thread is privately moderated by ExperimentalAir, who may elect to delete unwanted replies.
Apr 04, 2015, 10:28 PM
Gone Fly'n
planecrazy1969's Avatar
Love your slope soaring videos Andrew...and very nice planes...keep them coming
Sign up now
to remove ads between posts
Apr 05, 2015, 03:49 AM
Reap the wild wind
headlessagain's Avatar
Ditto re your videos Andrew. On the subject of slope ships, what do you consider to be the maximum wingspan/chord combo Armin wing that would be robust enough to cope with 20-30 mph winds? I've just bought 100m of 75 micron laminating film and thinking in terms of one full length spar with carbon in tube joiner with another smaller carbon in tube joiner at about 2/3 chord to stop the wing twisting at the root.
Andy
Apr 05, 2015, 05:49 AM
Whoa……it flies
anewton's Avatar
Thanks chaps.

Headless, I like your double spar idea at the root. I have flown my 1.5m (single spar) and 2m (2 spars) in 20kn+ and they're fine, even flew the 1.5m DLG style sloper in 40kn recently. None of them have the 75 micron laminate so yours will be stiffer to start with.

I'd go for 1.5m and 6" chord. One layer of former to keep it slim and low drag.
Apr 05, 2015, 08:33 AM
Reap the wild wind
headlessagain's Avatar
So a 6mm depron base, 9mm spar at about 30%, another at 3mm further back, a 3mm top skin giving me a total wing thickness of 18mm = 12% thickness. Sound about right? 1.5m or 60" is, after all, the classic wingspan for a glider
Andy
Apr 05, 2015, 04:15 PM
Whoa……it flies
anewton's Avatar
I have only ever used a single piece of 6mm forming the whole airfoil, bent at the leading edge, and 7.5mm spars. Have you used 3mm for the top layer before?
Last edited by anewton; Apr 05, 2015 at 04:40 PM. Reason: added pictures
Apr 05, 2015, 04:54 PM
Reap the wild wind
headlessagain's Avatar
Yes, with a 3mm packer on top of the 6mm at the leading edge so that when the 3mm top skin is added it allows for some 12mm stock balsa leading edge to be used. It also toughens up that vulnerable area.
Andy
Apr 05, 2015, 06:05 PM
Whoa……it flies
anewton's Avatar
Oh very nice Andy, advanced techniques. I could learn from you. Any photos to share?

Here's my DLG style sloper surviving in 40kn
(1 min 46 sec)
Last edited by anewton; Apr 05, 2015 at 06:26 PM.
Apr 06, 2015, 02:46 AM
Reap the wild wind
headlessagain's Avatar
I used this method back in 2012 when I replaced the spar and rib depron wing with an Armin wing on my Little Stick https://www.rcgroups.com/forums/show...postcount=1518 and scaled this up for my Big Stick in 2013 https://www.rcgroups.com/forums/show...postcount=3264
Big Stick Armin wing depron RC plane (4 min 33 sec)

Then there's the hybrid wing section "KFH Super Sloper" which is like a reduced chord Armin wing but with a KFm like step which I used on my Flytrap and Funbat
https://www.rcgroups.com/forums/show...postcount=1268
Funbat maiden flight (3 min 10 sec)


That's quite some wind for such a model. Nice backward flying as well. I guess that any attempt to perform a loop would have seen the model disappear over your head. How would your slope modified Phoenix 2000 have coped in such conditions
Andy
Last edited by headlessagain; Apr 06, 2015 at 02:54 AM.
Apr 08, 2015, 04:25 PM
Search49
Shawn Rolison's Avatar

Ozone (Big Nellie) Maiden Flight


Big Nellie in New Ulm, TX (7 min 13 sec)


I finally got the time for a proper maiden flight, let me know what you think
Apr 08, 2015, 04:52 PM
Whoa……it flies
anewton's Avatar
Andy, yes an attempted loop would see me calling Security at the Alcoa Plant (about 20m behind the slope) I'm amazed this one flew at all. It has inspired me to revisit the design and try to cut the drag down more.

The Phoenix would have done better I suspect. More weight behind it and a proper airfoil. Crow for landing would help too.
Apr 12, 2015, 11:22 PM
Registered User
Think4WD's Avatar
Is there any plans in this thread for a simple VTOL similiar to the gnats sold by fancy foam?
Apr 13, 2015, 01:18 AM
What could possibly go wrong?
nickchud's Avatar
How about this one from Jetset44. Here's the build thread

Everyone should have one.

Apr 13, 2015, 02:09 AM
Registered User
mark622's Avatar
I made a foam board Specter with an Armin wing. I was always interested in making this plane, but was never sure how to attach the booms. So a big thanks goes out to Andrew Newton on his little youtube vid on how to attach the booms, after that video I started gathering the stuff needed for the plane. It flies great.

Foam Board Scratch Built Specter:
Foam Board Scratch Built Specter (20 min 21 sec)
Last edited by mark622; Apr 13, 2015 at 02:24 AM.
Apr 14, 2015, 03:54 PM
Whoa……it flies
anewton's Avatar
Well done Mark, glad the video helped.
Some constructive criticism for your camera operator - shorter is better.
If you don't want to edit it's best shoot a short segment of close action for sharing.
Apr 14, 2015, 09:27 PM
Registered User
mark622's Avatar
Quote:
Originally Posted by anewton
Well done Mark, glad the video helped.
Some constructive criticism for your camera operator - shorter is better.
If you don't want to edit it's best shoot a short segment of close action for sharing.
Yeah lol, it did turn out a bit long.


Quick Reply
Message:

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log SEW-SLO 30" Foamboard Wing Atx_Heli Foamies (Scratchbuilt) 79 Aug 03, 2019 01:15 PM
Discussion EDF/Motor for University Design Project uwpropulsionguy Electric Ducted Fan Jet Talk 2 Oct 14, 2018 04:51 AM
Build Log SEW-SLO 30" Foamboard Wing Atx_Heli Flying Wings 0 May 19, 2011 09:47 PM
Question So I have a sheet of $Tree foamboard... what to build? Bomb Dropper Foamies (Scratchbuilt) 15 Mar 23, 2011 02:49 PM