Thread Tools
Oct 24, 2013, 09:07 AM
Another one on the way...
ysolomon's Avatar
Thread OP
Just modified the name of this thread. As it turns out, the M-346 will also be used by the USAF as the next advanced jet trainer, replacing the T-38. It will be known as the T-100. So, our build will produce three planes: The M-346, Yak-130, and T-100...

http://www.aleniana.com/files/T-1002-fact-sheet.pdf
Sign up now
to remove ads between posts
Oct 24, 2013, 11:14 AM
Registered User
Kevin Cox's Avatar
I thought the program/selection was delayed or pushed back. At any rate the MB is ahead of them all in terms of modern aerodynamics and electronics...off the self.
Oct 24, 2013, 01:32 PM
Another one on the way...
ysolomon's Avatar
Thread OP
Then we might have a flying T-100 ahead of the US Air Force...
Oct 24, 2013, 03:08 PM
Registered User
kevin's Avatar
(3 min 53 sec)
Oct 24, 2013, 03:42 PM
Another one on the way...
ysolomon's Avatar
Thread OP
Cool video!
Oct 24, 2013, 04:03 PM
Registered User
p901P901's Avatar
General characteristics

Crew: two, student and instructor
Length: 10.97 m (36 ft 0 in)
Wingspan: 10.86 m (35 ft 7 in)
Height: 3.60 m (11 ft 9 in)
Wing area: 19.3 m (208 ft)
Airfoil: NACA 64A-114 (mod) at centreline, NACA 64A-212 (mod) at tip
Empty weight: 3,075 kg (6,780 lb)
Loaded weight: 4,400 kg (9,700 lb)
Max. takeoff weight: 5,897 kg (13,000 lb)
Powerplant: 1 Rolls-Royce Viper Mk. 632 turbojet, 4,000 lbf (17.8 kN)

These are some fat symmetrical fat airfoils. How did you want to fly this?
Oct 24, 2013, 04:15 PM
Another one on the way...
ysolomon's Avatar
Thread OP
Thanks, P901.

My worry is that emulating the original, full size airfoils will not be appropriate for the 1/7 model.
I would like to build a plane that would potentially reach 150-160mph, but will have relatively lower wing loading (it does have a relatively big wing...) that will allow it to land slow. I'm thinking about potentially designing some washout towards the tips to avoid tip stalls.

I'm thinking about putting either HS-225MG in the wings for ailerons, if possible, but not sure. Might have to settle for the HS-5125MG, which will allow me to use a thinner airfoil.

I love thinking through all of this!

In some other threads, I read a recommendation that I should use the MH 60, 61, 62, or 64 airfoils, originally designed for flying wings. They vary in thickness as well.

At some point, I'm going to have to pick one (or two, if I have variable airfoil from root to tip...) and go...
Oct 24, 2013, 04:32 PM
Registered User
p901P901's Avatar
Had good luck with Rg-15 at the root and Rg-14 at the tips with no washout on some of my fighters. Conventional planes I went with the MH-60 with 2 degrees washout. Many other airfoils will work also so its up to your flying preference. I think you better off going with a semi symmetrical airfoil.
One other thing that is depending on the airfoil you select is the amount of decalage you need.
Oct 24, 2013, 04:38 PM
Another one on the way...
ysolomon's Avatar
Thread OP
What do you mean by "fighters" and by "conventional planes"?
Oct 24, 2013, 04:47 PM
Registered User
p901P901's Avatar
I should have said swept wing fighters and straight wing conventional planes.
The problem with the MH-60 is that they have a reflexed airfoil and they tend to pitch up when flying fast. They will have less of a stall when flying slow.
Looks like the plane does have a NASA droop on the outer wing section?
Last edited by p901P901; Oct 24, 2013 at 06:24 PM.
Oct 24, 2013, 08:52 PM
Registered User
p901P901's Avatar
So far looks like MH-60 is the best. Tried MH-20, MH-45 and combinations of them. Also The RG-14 and 15 combinations did not look as good as the MH-60.
The RG-14 and 15 combinations had some erratic drag up till 4 degrees then it smoothed out. CG was set at 10" and NP is 11.5". Moved cg to 8" and data did not change that much
All airfoils was set to zero degrees. Used Naca 0005 for the tail planes. Did not install any Nasa droops.
Hope this helps.
Last edited by p901P901; Oct 24, 2013 at 11:28 PM.
Oct 24, 2013, 09:40 PM
Another one on the way...
ysolomon's Avatar
Thread OP
Thank you so much! So, MH-60 from root to tip? Some washout with it?
Oct 24, 2013, 10:09 PM
Registered User
p901P901's Avatar
Yes its with MH-60 at the root and the tip with -2 degree washout. The plane will want to fly with 0.5 degrees nose up. So you will need to adjust the tail trim.
Oct 25, 2013, 12:44 PM
Lithium Member
Herb's Avatar
Quote:
Originally Posted by ysolomon
... I didn't know that C&C had a 1/7 scale also. It does support my belief that this is a good size for the 120mm fan. I still need to confirm the 2x90mm....!
A single should work well in this one,

http://www.rc-network.de/forum/showt...C-amp-C-Models

M346 mit/with DS-94-DIA HST und/and DSM6745-700 (3 min 1 sec)
Oct 25, 2013, 06:43 PM
Another one on the way...
ysolomon's Avatar
Thread OP
Herb, I suspect that this is the 1/5 size one, "fed" by a 120mm. I suspect that ours will be around 13-15lb. I could run in on a single 120mm, or a high power single 90mm. However, I'm thinking about a twin 90mm that are not driven too hard. I know, you like your jets light...


Quick Reply
Message:

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log Alenia Aermacchi M-346 nakayan Scratchbuilt EDFs 98 Oct 14, 2019 07:26 PM
Build Log Scratch Build Composite UAS System parri0923 UAV - Unmanned Aerial Vehicles 8 Jun 16, 2015 03:33 AM
Discussion Scratch Build RQ-7 Shadow Composite/Balsa parri0923 Balsa Builders 2 Jan 17, 2013 05:17 PM
Discussion Aermacchi M-346 deca78 Electric Ducted Fan Jet Talk 3 Nov 07, 2007 02:48 PM
EDF50 Aermacchi M-346/Yak-131 EDF Mike77 Electric Ducted Fan Jet Talk 0 Oct 26, 2005 05:29 AM