Shop our Airplanes Products Drone Products Sales
Thread Tools
Old Jan 20, 2009, 05:51 AM
N99JH is online now
Find More Posts by N99JH
Registered User
N99JH's Avatar

Xb-35


Quote:
Originally Posted by Hepdog
When you are ready to tackle that big flying wing give me a call. Making it stable isnt impossible
XB-35 flying wings were successfully flown in R/C format well over 20 years ago so making it fly in a stable manner is not a problem at all. Just have the CG at 22-25% MAC.
Joshua
Sign up now
to remove ads between posts
Old Jan 20, 2009, 07:42 AM
dag214 is offline
Find More Posts by dag214
Rock On- Damon Atwood
dag214's Avatar
Quote:
Originally Posted by N99JH
XB-35 flying wings were successfully flown in R/C format well over 20 years ago so making it fly in a stable manner is not a problem at all. Just have the CG at 22-25% MAC.
Joshua
The CG has never been a concern to me, after reading the history of it and looking at how it flew the plane was very stable. From what I have read the one that crashed was because the pilots took it out and performed un-approved deep stalls, bad idea in a plane that already had light yaw control.

My only worry would be at a scale of less than 150" if there is enough scale vertical stab area for the plane to be stable in the yaw axis. Just my 2 cents, but what a cool plane it would be.

DAG
Old Jan 20, 2009, 08:17 AM
gnats82 is offline
Find More Posts by gnats82
Coy, peruser of worlds
gnats82's Avatar
DAG -

There was a discussion thread started in scale electric planes about the B-35s in case you're interested. Motivated by having known one of the XB-35 crew (flight engineer O.H. Douglas) in my youth, I've had a N9M on the 'back burner' for some years and I'm sure that the split drag rudders would be as worthwhile on the model as they were needed on the full scale. Perhaps coupling with a gyro would be possible.

Edit: It appears that the discussion thread in Scale Electric Planes on the X/Y B-35 has died.
Last edited by gnats82; Jan 20, 2009 at 08:38 AM.
Old Jan 20, 2009, 09:44 AM
jfetter is online now
Find More Posts by jfetter
HAL... Open the damn doors!
jfetter's Avatar
Quote:
Originally Posted by Draknkep
I wish they showed one setup in the contra-rotating configuration, all the ones they show are configured for gang operation. I'd like to see their hardware because I wouldn't mind trying the larger one on a 90-sized plane and using 2 props, might be fun!

Jack
Old Jan 20, 2009, 10:26 AM
gnats82 is offline
Find More Posts by gnats82
Coy, peruser of worlds
gnats82's Avatar
Jfetter -

I looked at the link page too and think we are seeing them in the counter-rotating configuration. The anodized blue case turns in on direction, the metal finish shaft rotates in the other. Is that what you meant?
Old Jan 20, 2009, 10:30 AM
RiBell is online now
Find More Posts by RiBell
Registered User
RiBell's Avatar
We have a fly-in in May at a local field it's a pretty big event for us locally.
Last year a guy (don't know who he was) brought a X-35; it was about a 60"-70" ish span; covered with chrome Monokote. Sadly it stalled on landing.
Here's a couple of pic's of it.
Rick
Old Jan 20, 2009, 10:59 AM
Angelo is offline
Find More Posts by Angelo
Registered User
Angelo's Avatar
What a beautiful model, it's a shame he crashed it, hope it wasn't totaled.

The contra-rotating props on the XB-35 were so problematic that they tried flying it with regular props, so this is a scale arrangement. Performance suffered a lot tho, and the XB-35s propulsion problems weren't fixed until switching to jet engines, yielding the YB-60.
Old Jan 20, 2009, 11:13 AM
gnats82 is offline
Find More Posts by gnats82
Coy, peruser of worlds
gnats82's Avatar
Angelo -

Did you mean YB-49? It is the jet engined successor to the B-35 design.

They hadn't developed temporary spin recovery systems in the YB-49 era as they used in B-2 development. Pity that they lost some great fliers (i.e. Glen Edwards) and the YB-49 from a simple test proceedure, apparently while coming down from a high altitude.
Last edited by gnats82; Jan 20, 2009 at 11:22 AM.
Old Jan 20, 2009, 11:54 AM
jfetter is online now
Find More Posts by jfetter
HAL... Open the damn doors!
jfetter's Avatar
Quote:
Originally Posted by gnats82
Jfetter -

I looked at the link page too and think we are seeing them in the counter-rotating configuration. The anodized blue case turns in on direction, the metal finish shaft rotates in the other. Is that what you meant?
No, in the coutra-rotating configuration you'll see 2 prop hubs, these are all ganged. Turns out some of these are not yet available, not sure what kind of timing there might be but I'll watch over the next few months...

Jack
Old Jan 20, 2009, 12:28 PM
bigbobed is online now
Find More Posts by bigbobed
Awsome 2.5D Pilot.
bigbobed's Avatar
here you go.
http://www.espritmodel.com/index.asp...OD&ProdID=3116
Old Jan 20, 2009, 12:59 PM
N99JH is online now
Find More Posts by N99JH
Registered User
N99JH's Avatar
Quote:
Originally Posted by bigbobed
This is not a counter-rotating configuration. It is two motors coupled together.
Old Jan 20, 2009, 01:09 PM
Tonystott is offline
Find More Posts by Tonystott
Its all fun
Tonystott's Avatar
The diagrams certainly show counter-rotating, as does the description. Look at the ballraces in the hub of the prop nearest the motors. The rear prop is not connected to the shaft leading to the front prop.
Old Jan 20, 2009, 01:21 PM
jfetter is online now
Find More Posts by jfetter
HAL... Open the damn doors!
jfetter's Avatar
Quote:
Originally Posted by N99JH
This is not a counter-rotating configuration. It is two motors coupled together.
I posted this picture yesterday. Yes, this picture shows the correct contra-rotating configuration. The rear prop bolts directly to the motor in front (the can itself). The prop hub you see is secured to the inner (contra-rotating) shaft via 2 set screws, if for the forward prop...

Jack
Old Jan 20, 2009, 01:32 PM
Rickn816 is offline
Find More Posts by Rickn816
RCHN #150
Rickn816's Avatar
Quote:
Originally Posted by sneasle
Hobby city has a counter rotating double motor setup that is smaller then the Axi. Let me see if I can find it.


Here it is:

Linky

It might be too small for you, but it's a heck of a lot cheaper.

It's a 300W system, so with 4 of them my mental math says something like a 70" wing maybe?
Whew. That beats $950 each.
Old Jan 20, 2009, 01:41 PM
jfetter is online now
Find More Posts by jfetter
HAL... Open the damn doors!
jfetter's Avatar
Quote:
Originally Posted by Rickn816
Whew. That beats $950 each.
Yeah but the HC one is 300 watts x 2 while the Axi is 2,600 watts x 2, not really apples to apples...

Jack


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Good B-36 site (drawing with cross sections, too!) Thomas B Scale Kit/Scratch Built 26 Oct 11, 2011 10:14 PM
Discussion B-36 B-52 kgmorris Scale Kit/Scratch Built 20 Jan 02, 2009 07:27 AM
b-36 dorysch1 Scale Kit/Scratch Built 32 Feb 01, 2004 09:33 PM
Questions about my wally B-36...I'm new to foam. Boba_Fett Foamies (Kits) 8 Jun 11, 2002 04:36 PM
B 36 Trobber Parkflyers 3 Dec 30, 2001 01:33 PM