Republic-Ford JB-2 "Buzz Bomb"

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lakeroadster

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Anybody ever built and flown one of these as a Model Rocket? How about a German V-1?

Kurt Affholter over on the Estes FB page is taking a stab at a JB-2 and has built a beautiful model, starting with a BT-60 Patriot nose cone.

167992365_880698409329025_3270174137362538748_n.jpg


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Republic-Ford JB-2

I created an OR simulation, starting with a @K'Tesh .org file and it looks to be stable. Kurt's model has a 18mm motor mount.

With those big fins it seems like it would be prone to weather cocking?

For recovery.... What If... at ejection the motor releases the nose cone ballast so it slides backward, shifting the cg rearward and at the same time kicking the rudder to allow glide recovery?

Open Rocket.jpg

Kurts Buzz Bomb.jpg

Kurts Buzz Bomb Simulation Plot.jpg


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Side View 24 mm Version.jpg
 
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KenECoyote

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Build it and it will fly!

...for how long and how well is another matter. :p
 

lakeroadster

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I remember a movie were they fired up the Thunderbug to scare all the new recruits.
Pilots used to fly along side them, put their planes wing under the buzz bombs (doodle bugs) wing and tip them, which would roll the buzz bomb and it would crash.


They were weird. Imagine a dark sky during war time and you hear this....

 
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K'Tesh

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This is a really neat project. However, in looking at your original photo, that doesn't look like a PNC-60AH (those are longer) It looks more like a PNC-60N (but that has a sharper point).
 

K'Tesh

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They were weird. Imagine a dark sky during war time and you hear this....

From the interviews I've seen of British citizens who were in London during those attacks, it was when the [Edit]V1s[/EDIT] went silent that they really began to fear.

[EDIT] NOTE TO SELF: Take pain meds and get sleep before responding to posts. I erroneously originally said V2s.
 
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K'Tesh

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In looking at photos of nosecones, it seems like the original looks more like a PNC-80K (the one used in the V2 kit). Are we sure it was a BT-60 model? Or is that what you're trying to use instead?
 

mikeyd

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KenECoyote

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I just happened to converse with Kurt on FB about adding nose weight and it ends up being for this build! Seems he needs 7oz.
As a side note, I gathered some parts last night to try a Viking Bulk Pack version of this V-1 as a semi-scale...should be fun!
 

ksaves2

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From the interviews I've seen of British citizens who were in London during those attacks, it was when the V2s went silent that they really began to fear.
You're absolutely wrong, period about the V-2. The V-2 was supersonic and there was no warning it was going to hit at all. Only the explosion would be heard.
I did read if one was relatively close to the impact point of a V-2 that a faint whoosh might be heard before impact due to a preceding shock wave but it wasn't loud at all. Being too close to the impact point and one likely wouldn't survive to tell the tail anyways!

The V-1 which was subsonic was correctly identified as the craft one had to be nervous about after the motor cut out. The V-2 there was no audible warning where it would hit. Just a big boom out of nowhere.

My mother's Uncle Clarence was a crew chief (on P-38's) and was in London during both the V-1 and V-2 attacks. He said precisely that. The V-1 one would get nervous when the motor cut out. The V-2 there was no warning and just an explosion out of nowhere.

Uncle Clarence was in the service before the war and was in California early on. Very interesting guy. He related about the early days of the P-38. Standard operating procedure was to bailout with one engine out. He said one day they said Charles Lindbergh was flying to the base in a new (at the time) P-38. When Lindbergh called the tower, word got out to the airbase's men with all eyes to the sky. Lindbergh comes into the pattern with one engine feathered, lands nominally and exited the plane with his r.o.n. bag (remain over nite). Made a comment to the base commander, "It flies pretty well on one engine."

I did read early in the development of the P-38 it was s.o.p. to bailout after losing one engine but I've never been able to confirm the Lindbergh story by other sources.

Sounds plausible though as F.D.R. clipped Lindbergh's wings because of his pre-war pacifist views with the America First movement. Lindbergh volunteered for military service but F.D.R. nixed it as he was pissed at him for his anti-war views.

The day after Pearl Harbor Lindbergh said that it's obvious America First needs to be disbanded (and it was) and he volunteered for service in the military. As said, F.D.R. stood against that and Lindbergh did what he could working for aircraft manufacturers. It's well known he did a lot of flying with the Chance-Vought F4U Corsair and pioneered flying it with very heavy loads and showed the Marines how to use it effectively.
He wrote some about it in his diaries which have been published.

It must be remembered that Lindbergh was pushing 40 when the war started and men were considered "pretty old" when they hit 40 years old. I don't know if there were any 40 year old fighter pilots flying active combat back then as I suspect the military felt it was a "young man's game".

Kurt
 

K'Tesh

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You're absolutely wrong, period about the V-2. The V-2 was supersonic and there was no warning it was going to hit at all. Only the explosion would be heard.
I did read if one was relatively close to the impact point of a V-2 that a faint whoosh might be heard before impact due to a preceding shock wave but it wasn't loud at all. Being too close to the impact point and one likely wouldn't survive to tell the tail anyways!

The V-1 which was subsonic was correctly identified as the craft one had to be nervous about after the motor cut out. The V-2 there was no audible warning where it would hit. Just a big boom out of nowhere.

My mother's Uncle Clarence was a crew chief (on P-38's) and was in London during both the V-1 and V-2 attacks. He said precisely that. The V-1 one would get nervous when the motor cut out. The V-2 there was no warning and just an explosion out of nowhere.

Uncle Clarence was in the service before the war and was in California early on. Very interesting guy. He related about the early days of the P-38. Standard operating procedure was to bailout with one engine out. He said one day they said Charles Lindbergh was flying to the base in a new (at the time) P-38. When Lindbergh called the tower, word got out to the airbase's men with all eyes to the sky. Lindbergh comes into the pattern with one engine feathered, lands nominally and exited the plane with his r.o.n. bag (remain over nite). Made a comment to the base commander, "It flies pretty well on one engine."

I did read early in the development of the P-38 it was s.o.p. to bailout after losing one engine but I've never been able to confirm the Lindbergh story by other sources.

Sounds plausible though as F.D.R. clipped Lindbergh's wings because of his pre-war pacifist views with the America First movement. Lindbergh volunteered for military service but F.D.R. nixed it as he was pissed at him for his anti-war views.

The day after Pearl Harbor Lindbergh said that it's obvious America First needs to be disbanded (and it was) and he volunteered for service in the military. As said, F.D.R. stood against that and Lindbergh did what he could working for aircraft manufacturers. It's well known he did a lot of flying with the Chance-Vought F4U Corsair and pioneered flying it with very heavy loads and showed the Marines how to use it effectively.
He wrote some about it in his diaries which have been published.

It must be remembered that Lindbergh was pushing 40 when the war started and men were considered "pretty old" when they hit 40 years old. I don't know if there were any 40 year old fighter pilots flying active combat back then as I suspect the military felt it was a "young man's game".

Kurt
Dammit! I hate it when I respond to things on 3 hours of sleep... You're absolutely right, I *MEANT* to say V1s... You'd never hear a V2 coming in (as you said, it was faster than the speed of sound). I've been mixing those two up for a couple of days now. I hate sleep deprivation (It's been cold and wet, and that makes my old cycling injuries hurt like Hell). I've edited the post to correct the error.
 

MadRocketer

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Either flying bomb would be equally terrifying to be the pilot of! Especially the Natter, it was made out of wood. WOOD! One of the rocket plane’s favorite things was to burn up on the launch gantry upon ignition.
E1362DA7-5C46-4386-A7FF-377C60E10C02.jpeg

It would make a good looking model rocket though, with a custom launch rail. Many recovery options as well...
366BC4FE-DEBB-4312-933C-D42C7162BFA0.jpeg
 
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ksaves2

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Dammit! I hate it when I respond to things on 3 hours of sleep... You're absolutely right, I *MEANT* to say V1s... You'd never hear a V2 coming in (as you said, it was faster than the speed of sound). I've been mixing those two up for a couple of days now. I hate sleep deprivation (It's been cold and wet, and that makes my old cycling injuries hurt like Hell). I'veut i edited the post to correct the error.
Cooolll,

I thought it was an honest "finger on the keyboard mistake*. Yeah, I hate sleep deprivation too. I M.D.'d in my younger days. I know a lot about not getting enough sleep!! Was absolutely the cruelest thing I ever had to go through in life.................

But I did learn a lot in the trauma unit at Cook County. Had to slash open the chest (by criteria) of 7 gunshot guys/gal to do open chest heart massage and actually brought one of them back with a beating heart. He died in the O.R. though. I felt so stupid but here I was trying to bring some guys and one woman back to life. Chicago city life can be hard I tell you if you live in the wrong area (1984 I hear it's worse now). Glad I ended up in a rural area that is in central Illinois that is open to flying rockets and hunters shoot at wild game and not people with large caliber weapons and shotguns.

That was a really life "opening" experience as I did it all by myself and after shocking a guy's heart (after I cross clamped his aorta and stuffed a foley catheter into his right atrium with a purse string suture to hold the foley into the right atrium) "I was standing there thinking, "Now WTF am I supposed to do!" His freaking heart is beating again. The ambulance driver who brought the poor
"bastid" in said, " I haven't seen that happen in 10 years.!"

Mostly folks die after being shot up to hell.
His heart was beating in my hands. That was a big freaking thing to remember in my life. He died though and the bad thing was it didn't freak me out that much as mostly all of them died. If I let all of them weigh on me I'd probably go nuts so I pretty much forgot about them except this one that just about made it. I would have cussed him out big time if he'd survive. "I saved your mother effing ass, I would have told him. Don't effff up your second chance you got at life!"

The second "operating team" grabbed him and took him up to surgery where he died. 45 minutes later another gunshot woman, full cardiac arrest victim came in and she died. She likely had been stone cold dead for a long time as when I tried to hand pump her heart, it was hard as a stone. After slashing open her chest, cross clamping the aorta, stuffing a foley catheter into the right atrium and hand pumping/shocking the heart. It was obvious she was deceased That was the bad old days.

Asked the ambulance guys how long it took them to bring her to County and they said they got stuck in traffic and no one was doing CPR for an hour and a half. I suspect that's a curse for being black/African American but the wound was right through the left ventricle of the heart. Fatal in a few seconds anyways.

So it didn't freak me out. Just a victim to allow me to practice on bringing back to life as is the case in most big cities. Doctors gotta learn how to do it somehow.

It was obvious. Her wound was absolutely mortal anyways. If they got there in a minute, it wouldn't have mattered. She was dead a few seconds after the bullet hit her body.

I got good at slashing people's chests open at that time in my life.

Glad I never had to do that again when I got into primary care.
Even more happier that I'm retired now. No more call.
Gotta fly more rockets!!!!

Kurt
 

Cape Byron

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Holy crapsticks! That's a hard post to follow even for someone with trauma experience.

Anyhoo... On the subject of the JB-2, I have a small resin kit on Fleabay which I'm happy to pull down and pass onto someone on the forum for free, just the cost of the postage.


PM me if you're interested in such resin display things.
 
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