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Dec 14, 2010, 10:13 PM
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drew1231's Avatar
Quote:
Originally Posted by SilentHunter
Yeah Im not a huge fan of its names, lancer, bone etc... Too pretty for those names.
I like lancer and bone would have gone great with he new concept b-1.

They had a concept for a b-1R with the engines (minus thrust vectoring) from the f-22 and a massive missile rack.

It was to be names the b-1r or the boner
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Dec 14, 2010, 10:20 PM
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SilentHunter's Avatar
Lancer sound like your poking a zit, bone sounds like... well the other name for Penetrator
Dec 14, 2010, 10:54 PM
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Flexserve's Avatar
Quote:
Originally Posted by SilentHunter
Lancer sound like your poking a zit, bone sounds like... well the other name for Penetrator

Well if your seeing one on the wrong end of the theater's fence...your boned.
Dec 16, 2010, 01:40 PM
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Flexserve's Avatar
......
Last edited by Flexserve; May 24, 2013 at 01:03 AM.
Dec 20, 2010, 10:15 AM
A Global Force For Good
jmpdgs's Avatar
Tried to register on your the B-1b.net site, but it never sent the "verification email" and I've never been able to log in.
Dec 20, 2010, 11:25 AM
Avoid The Ground!
Flexserve's Avatar
Quote:
Originally Posted by jmpdgs
Tried to register on your the B-1b.net site, but it never sent the "verification email" and I've never been able to log in.
Sorry was working on backend. Your registered.
Dec 20, 2010, 12:32 PM
Registered User
I'm interested to see a discussion on "how" the swing-wing mechanism is to be built. I'm thinking that one would have to build a mechanism that can provide the travel necessary and the "hold" force to keep the wings at the requested angle, while in flight (with the loading factor of air pushing against the wing-panel.

One thing we can use, is 2 linear actuators (commonly used in the robotics field) with enough strength to swing one wing itself. I've looked at a few, and the folks in Firgelli, Vancouver BC (http://www.firgelli.com/) have a nice selection, have R/C connection capabilities to boot.

Calculating the required force would be next, as the units come in at 10 to 300 Newtons, but weight goes up then... Problem is, what weight would one use for a wing-panel? Would we use the "drag" force divided by 2 (as it is in equilibrium with the "thrust" force in non-accelerating flight? I guess so...

Next, moment-arms and you have your minimum actuator strength... Comments?


--d



Cheers,


--d
Dec 20, 2010, 12:36 PM
High Altitude Specialist
snivilous's Avatar
ummm...i saw a guy who used one high torque servo and had two servo arms come off it, when the wing was fully forward the servo arm and the servo rod would align so the load would get dumped into the servo housing, nothing complicated. don't know how he held it in a specific position, but would work well for full forward and full aft sweep.
Dec 20, 2010, 01:43 PM
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Flexserve's Avatar
Quote:
Originally Posted by snivilous
ummm...i saw a guy who used one high torque servo and had two servo arms come off it, when the wing was fully forward the servo arm and the servo rod would align so the load would get dumped into the servo housing, nothing complicated. don't know how he held it in a specific position, but would work well for full forward and full aft sweep.
Looks something like this?

However, this is being HEAVILY modified. We have to take into account the CG during and after sweep. The B-1B will try NOT to use the typical elevetor up correction that most F-14's do. Instaed a sliding battery tray linked to the wing sweep mechanism is being entertained for correct CG throughout a sweep; no matter the degree of sweep.
Last edited by Flexserve; May 24, 2013 at 12:52 AM.
Dec 20, 2010, 03:19 PM
Registered User
The single servo is a neat approach, i'm just wondering for larger scales (80+ " wingspan) this might not be a suitable beefy enough option...

Anyway, messing around... My first "placement" for a linear actuator...

Need to do the calculations to see if this would fit the bill for a larger model...

--d
Dec 20, 2010, 08:03 PM
Registered User
LuvEvolution7's Avatar
the problem with those actuators, is that the controller boards are so damned expensive to buy. the actuators are fairly cheap, but each one needs a seperate controller. I know there was a guy on RCU that was trying to make a board to control multiple actuators. not sure how he made out with that though.
Dec 20, 2010, 08:37 PM
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Flexserve's Avatar
Looks to overcomplicate the design.
Dec 20, 2010, 08:39 PM
Registered User
LuvEvolution7's Avatar
Quote:
Originally Posted by dlinegar
The single servo is a neat approach, i'm just wondering for larger scales (80+ " wingspan) this might not be a suitable beefy enough option...

Anyway, messing around... My first "placement" for a linear actuator...

Need to do the calculations to see if this would fit the bill for a larger model...

--d
the 18 foot B-1 that Bob is building is using these actuators for wing sweep. not sure of the exact model, but they are huge actuators. if you want to check it out, the site is www.b1modelproject.com
Dec 20, 2010, 08:45 PM
Registered User
SilentHunter's Avatar
Standard servo, screwjack and external pot Basically you disconnect the internal pot in the servo, and reconnect to another one identical but external. The external pot is hooked up via linkage to the mechanisim. Get a servo shaft coupler and a threaded rod for the jackscrew. The endpoints can be adjusted by the external pot's linkage. You need to fab a little simple hardware but its no biggie at all.

Pretty simple, cheap and powerful! All the parts are at Servocity.com
Last edited by SilentHunter; Dec 20, 2010 at 08:51 PM.
Dec 20, 2010, 09:31 PM
Registered User
LuvEvolution7's Avatar
I'de like to see this setup, if you are going to do it. I've thought of something similar, to drive the landing gear on my Jaguar. should work................I THINK!!!!!!!!!!!!!!! LOL.


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