RE: 1/8th scale B-1B   
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RE: 1/8th scale B-1B - 11/16/2009 12:33 AM   
rcyogi


 

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RE: 1/8th scale B-1B - 11/16/2009 12:43 AM   
theb1bman



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Status: offline 		we mite us up another page of red hand followers



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RE: 1/8th scale B-1B - 11/16/2009 12:44 AM   
bcovish



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Status: offline 		"This user is on your "block" list and the message has been blocked"

This is great. When you hit the block button on a post, all of that persons posts are blocked and get the above message everytime he posts. And it applies to any post he makes on RCU no matter what thread. So everyone hit the block button on the idiot.

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RE: 1/8th scale B-1B - 11/16/2009 12:53 AM   
SPLIT S



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Status: offline 		All bow and hail to the red hand - shop smart, shop s mart (for all of you Army of Darkness fans)

Now back to one killer B1....

Dan

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Hi Dad, Doing anything? Want to go to the field?

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RE: 1/8th scale B-1B - 11/16/2009 12:55 AM   
invertmast


 

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quote:

ORIGINAL: udet1918

Can anyone tell me what the block button does? It's located in the bottom of the post windows. Perhaps if everyone blocked a certain someone we would not need to read about perfection all the time!

Ron


Hey! just now noticed that button... its going to come in handy! WOOOOT!


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RE: 1/8th scale B-1B - 11/16/2009 1:02 AM   
LearnedInUk



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RE: 1/8th scale B-1B - 11/16/2009 1:06 AM   
rcyogi


 

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Status: offline 		OK enough of the red hand......where is the new video? I need my fix........Show me the video......what happen to the F16? Lets see the finish product......

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RE: 1/8th scale B-1B - 11/16/2009 1:33 AM   
Dan M


 

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< Message edited by Dan M -- 12/3/2009 12:10 AM >

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RE: 1/8th scale B-1B - 11/16/2009 1:49 AM   
bcovish



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Status: offline 		Ok Bob, that problem seems to be taken care of.

Now it's time for you to "GIVE US THE FINGER"

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RE: 1/8th scale B-1B - 11/16/2009 2:49 AM   
Hustler58



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RE: 1/8th scale B-1B - 11/16/2009 2:58 AM   
Mike Emilio


 

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quote:

ORIGINAL: pilotdude57

So you want to block the person who was correct about the F-14 having washout, or the person who was wrong?

Geez, ,, I didn't want to say anything, , , , here's a clip from the factory drawing.

You guys can come to your own conclusions.


Pilotdude, , No offence intended guy, but you can see how you can get torn to shreds if you can't substantiate what you say. Hard facts are always better than some unverifiable conversation. The onis of substantiating what you say is up to you, not anyone else, or it just goes on being argumentative.

< Message edited by Mike Emilio -- 11/16/2009 12:25 PM >

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RE: 1/8th scale B-1B - 11/16/2009 4:56 AM   
rhallgarth


 

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quote:

ORIGINAL: Hustler58


quote:

ORIGINAL: rhallgarth


quote:

ORIGINAL: Hustler58

quote:

ORIGINAL: theb1bman

Thanks my CG is with in the 10-17% wing out but as I sweep them back to make it fly with no up elevator trim the CG needs to be about 2 1/2'' behind that.
If I got what you told pilotguy I should use the wing angle of attack and or just anhedral to change the center of lift?

I'm not sure how the anhedral works but they put it in the full scale for a reason. The anhedral on the B-1 is 1.9 deg

Anhedral allows a plane to be more unstable in flight. It might sound weird but most combat aircraft have 0 anhedral or have some anhedral in wings. All modern combat aircraft are designed to be unstable in flight or less stable in spiral mode. Dihedral increases stability in spiral mode while anhedral increases instability. If the plane cannot perform drastic aerodynamic moves to avoid threats it is at a disadvantage. With anhedral a combat aircraft can twist/roll faster in a side slip or roll movement. The F-4 is a polyhedral aircraft because initial flight testing indicated some real nastiness with the flat wing design in flight. One wants the plane to be slightly unstable but not unflyable.





The anhedral in the swing wing has little to do with the stability with the wing forward. It has affect on the wing when it swings back. You have to look at the pivot piont and watch the wing rotate back and you will see how the wing twist/rotate. Which gives it a under camber affect like a delta wing.




That is incorrect. anhedral always affects the spiral mode of any combat aircraft or its roll rate. There is a book "Modern Combat Aircraft Design" by Klaus that clearly analyzes this and other issues used when designing modern combat aircraft. The anihedral allows the aircraft to bank faster even with the wings in standard configuration. With the Central Air data Computer in auto mode the leading edge slats and the flaps are used to increase lift and turn rates in combat as well as allowing much slower landings.

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RE: 1/8th scale B-1B - 11/16/2009 5:06 AM   
rhallgarth


 

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Status: offline 		What is being done on this B1-B bomber IMHO is simply amazing. Bob and Butch have done an amazing design on this amazing aircraft and as a former Aerospace Engineer I do not see anything they have done that is even marginally questionable. The only question I have is how can I donate to this amazing project using PayPal.

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RE: 1/8th scale B-1B - 11/16/2009 6:35 AM   
Props4ever


 

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Status: offline 		Hey Bob, Butch guys where is the new video, nuff of this challatterr rest of you!!!.

It's amazing to see how this model stands on it's own gear!, keep bringing us what we most can't do for one reason or another!!.

Lets get back to Bob's shop.....

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RE: 1/8th scale B-1B - 11/16/2009 6:39 AM   
Seraphim77



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quote:

ORIGINAL: N622JR
quote:

ORIGINAL: theb1bman
Does anyone else agree that one of the worst things about model aviation is that it's so damned hard to video?? Anyone have any tips? Could focus be manually set to infinity, maybe?


I am new but so far the worst thing about model aviation is having an $.89 balsa glider budget, foamie ARF talent/experience, and B-1B dreams.
Although, talent and Experience can grow with research and practice, dreams can come true, and to heck with the car insurance, I'm buying a new kit!!!

Now the only thing I need to find is a spare 85'' of space in my house to build the thing.

John


Welcome John! Hey, we all start from somewhere and learn over time...nobody knows it all and very few can fork out an unlimited supply of cash! We do with what we have and build upon that. I have no doubt that if one of your goals and dreams in life is to fly jets, you will! Of course though, you might want to rethink the car insurance thing...you'll have to get to the field somehow...hopefully legally! You'll need it to trailer in your future B-1!

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RE: 1/8th scale B-1B - 11/16/2009 7:53 AM   
Seraphim77



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quote:

ORIGINAL: pilotdude57
quote:

ORIGINAL: Mike Emilio
quote:

ORIGINAL: pilotdude57
So you want to block the person who was correct about the F-14 having washout, or the person who was wrong?

Geez, ,, I didn't want to say anything, , , , here's a clip from the factory drawing.

You guys can come to your own conclusions.


Pilotdude, , No offence intended guy, but you can see how you can get torn to shreds if you can't substantiate what you say. Hard facts are always better than some unverifiable conversation. The onis of substantiating what you say is up to you, not anyone else, or it just goes on being argumentative.

What is that drawing from, are you saying it is the F-14? It shows washout but it appears to be only about two degrees.


Gentlemen...we're getting off topic here. Let's please take this "washout" discussion elsewhere to a F-14 thread as this one is dedicated to the B-1.

I'll say this though, from Wikipedia they say the airfoil for the F-14 is:

NACA 64A209.65 mod root
NACA 64A208.91 mod tip

In every picture and drawing I've seen, the Anhedral is there but I don't see any washout...and what appears to be hand traced/drawn rib sections seems very inconclusive.

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RE: 1/8th scale B-1B - 11/16/2009 8:07 AM   
lavi rider


 

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Status: offline 		I saw some docs both mine and the fellow who builds one as well and it shows a 3.2 Degree washout.

The airfoil you wrote is correct.

Very similar to HQ-Acro-1.0/12

the anhedral is around -1.8 degree.

Anyway back to the original post.....

Regards,

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RE: 1/8th scale B-1B - 11/16/2009 8:13 AM   
pilotdude57


 

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Status: offline 		I originally just wanted to make sure Butch and Bob have checked into whether or not the B-1b has washout. If they haven't looked at it, it would be a good idea. Just helping them cover all bases.

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RE: 1/8th scale B-1B - 11/16/2009 8:38 AM   
lavi rider


 

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From: Givat Zeev, ISRAEL
Status: offline 		Isn't it a bit late over there right now .....3:30 am?

A washout on this wing is not necessary it's just a nice to have feature.. the plane will fly fine with out it too ....

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RE: 1/8th scale B-1B - 11/16/2009 8:56 AM   
victorzamora


 

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Status: offline 		Washout would help reduce tipstall tendencies (to a certain point) and it could increase the Oswald Efficiency Factor significantly. I mean, you can achieve a a more elliptical lift distribution aerodynamically. I know that's the same thing...but I just wanted to clarify the point.

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Had I have known that the law of gravity was going to be so expensive, I would''ve voted to veto the darn thing!!

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RE: 1/8th scale B-1B - 11/16/2009 10:37 AM   
lavi rider


 

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Status: offline 		Yes you are right....but I ment for this particular model.....I just hope they have picked a "nice" airfoil for their bird for improved behaviour.

I would pick two different airfoils for the root and tip.

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RE: 1/8th scale B-1B - 11/16/2009 11:00 AM   
grbaker



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quote:

IGNORED *** - 11/16/2009 2:13 AM

pilotdude57
This user is on your "block" list and the message has been blocked.
Click here to unblock this user and view this post.


If a tree falls in the forest, but there is no one there to hear it. does it make a sound?

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RE: 1/8th scale B-1B - 11/16/2009 12:24 PM   
Mike Emilio


 

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quote:

ORIGINAL: pilotdude57
quote:

ORIGINAL: Mike Emilio
quote:

ORIGINAL: pilotdude57
So you want to block the person who was correct about the F-14 having washout, or the person who was wrong?

Geez, ,, I didn't want to say anything, , , , here's a clip from the factory drawing.

You guys can come to your own conclusions.

Pilotdude, , No offence intended guy, but you can see how you can get torn to shreds if you can't substantiate what you say. Hard facts are always better than some unverifiable conversation. The onis of substantiating what you say is up to you, not anyone else, or it just goes on being argumentative.

What is that drawing from, are you saying it is the F-14? It shows washout but it appears to be only about two degrees.

That's no hand tracing. Yes it is.
But now I'm thinking why I even bothered. It's in your favour, and thought it would put a quick end to the debate, but I guess you still want to argue some frivolous point. I'm going to delete it now.

This is the B1 thread.

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RE: 1/8th scale B-1B - 11/16/2009 12:44 PM   
lavi rider


 

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Status: offline 		Mike...Qusetion answered

Peter

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RE: 1/8th scale B-1B - 11/16/2009 2:08 PM   
victorzamora


 

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ORIGINAL: lavi rider

Yes you are right....but I ment for this particular model.....I just hope they have picked a ''nice'' airfoil for their bird for improved behaviour.

I would pick two different airfoils for the root and tip.



Absolutely, I mean (if chosen correctly), you get a more efficient increase in your Oswald (less total parasitic drag). I can only imagine this plane being a BEAST to fly if you don't choose the right airfoil and get aerodynamic twist just right. I mean, anything meant for high speed flight is going to suck to fly. The plane has really high AR wings...but I think they're pretty small for the plane. High wing loading??

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Had I have known that the law of gravity was going to be so expensive, I would''ve voted to veto the darn thing!!

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