propellers on WW2 bombs
Vucko
little propeller on the top of the bomb and also one on the
"bottom" of the bomb(fab-50,100,250).What is their purpose?
Are the used for stabilization of the bomb during the fall?
N329DF
>little propeller on the top of the bomb and also one on the
>"bottom" of the bomb(fab-50,100,250).What is their purpose?
they are the fuses. A pin keeps them from turning in flight when they are
attached to the plane. When released a wire pulls the pins which allows the
props to turn, arming the bomb after so many turns.
Keith Willshaw
"Vucko" <vus...@net.yu> wrote in message
news:3e92b74...@news.eunet.yu...
Dont know about the top & bottom but its failry common
to have one on the nose or tail and the purpose was to
arm the bomb.
On release the propellor would spin and arm the fuse
after making a certain number of revolutions
Keith
ArtKramr
>From: n32...@aol.com (N329DF)
>Date: 4/8/03 5:24 AM Pacific Daylight Time
>Message-id: <20030408082403...@mb-cb.aol.com>
Those "pins" were called arming wires. The arming wires were connected to the
A-2 bomb shackle on one end and to the bomb fuse on the other. When the bomb
was released the arming wire stayed in the plane and pulled outof the fuse on
bombs away. Arming wires were counted on landing. If you dropped ten bombs then
you should have 10 arming wires left in the bombay. If there was less that that
you knew an arming wire went out with the bomb and that bomb wouldn't explode.
It also meant that that arming wire was carelessly installed and some poor
armament guy would get his ass chewed.If you watch the history channel you
can sometimes see shots of a bombay after bombs away and you can see the
arming wires flapping in the breeze. Before take off I would always carefully
check every arming wire to see that it had been properly installed.
Arthur Kramer
Visit my WW II B-26 website at:
http://www.coastcomp.com/artkramer
Pete
"ArtKramr" <artk...@aol.com> wrote
>
> Those "pins" were called arming wires.
One slight correction ..."Are".
Same concept still in use today.
Pete
Robert Briggs
> If you watch the history channel you can sometimes see shots of a
> bombay after bombs away ...
^^^^^^
Hmm ... I didn't know there was such a concerted effort to flatten
India, old chap!
IBM
news:3E9325E5...@BITphysics.orgBUCKET:
And thats "Mumbai" these days, Hoss.
Mind you the old "Pilot to Mumbadier" kinda loses
something....
IBM
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ArtKramr
>From: Robert Briggs Robert...@BITphysics.orgBUCKET
>Date: 4/8/03 12:41 PM Pacific Daylight Time
>Message-id: <3E9325E5...@BITphysics.orgBUCKET>
To most Bomb Bay is two words. But to a select few of us BomBay will always
be one word.
robert arndt
The German V-1 also utilized a small prop up front to measure the
distance to the target. When the set distance was reached the V-1 was
steered into a steep dive.
Rob
Peter Twydell
<artk...@aol.com> writes
--
Peter
Ying tong iddle-i po!
Dave Eadsforth
a...@kwillshaw.demon.co.uk> writes
Just to enlarge a bit...
The arming vanes would arm either a pistol or a fuze.
A nose pistol would detonate the bomb on impact, by use of a striker
plate arrangement. The tail pistol would detonate the bomb by
deceleration causing the striker to hit the detonator cap.
The alternative to the instantaneous pistol was the fuze. Fuzes would
permit the choice of delayed detonation.
The GP bombs (apart from 40 pounders) used by the RAF in WWII offered
both nose and tail pockets. As Keith says, the arming vane would do its
job after a certain number of revolutions. Some fuzes also incorporated
a shear wire that would prevent any arming action taking place if the
bomb got nudged a bit too heavily during handling...
And some arming vanes would rotate freely in the slipstream on the vane
screw until the top of the screw was reached, upon which the arming vane
would begin to turn the arming mechanism. This allowed the bomb to get
well clear of the aircraft before arming took place (a popular feature,
one feels...)
Cheers,
Dave
--
Dave Eadsforth
Dave Kearton
news:DqE7eIAp...@ntlworld.com...
| >
| So how big was the Bombay's bomb bay?
| --
| Peter
|
| Ying tong iddle-i po!
A trick question of course. The Bristol Bombay had an external bomb
load - the inside for cargo.
....and about as attractive as a bush pig.
Cheers
Dave Kearton
Dave Kearton
"Dave Eadsforth" <da...@magnum.demon.co.uk> wrote in message
news:eGv08UAm...@magnum.demon.co.uk...
<<snipples>>
| And some arming vanes would rotate freely in the slipstream on the vane
| screw until the top of the screw was reached, upon which the arming vane
| would begin to turn the arming mechanism. This allowed the bomb to get
| well clear of the aircraft before arming took place (a popular feature,
| one feels...)
|
| Cheers,
|
| Dave
|
| --
| Dave Eadsforth
Sometimes this process goes wrong. On the 11th dec 1942 an RAAF Boston ,
A28-12 blew up when a load of 200lb fragmentation bombs was kept in the
aircraft's slipstream long enough to arm themselves.
One of the bombs subsequently exploded, killing FLTLT Vernon William Morgan
(Pilot), FLGOFF John Harold Borland (Nav/Bombardier) & SGT Ronald Thomas
Power (Gunner)
Cheers
Dave Kearton
Vucko
I saw many German ww2 bombs in military museum and
have not notices such things so I thougt that it was used by Russians
only.(probably dismounted during disarming bombs)
Dave Eadsforth
<dkea...@ozemail.com.au> writes
>
>
>"Dave Eadsforth" <da...@magnum.demon.co.uk> wrote in message
>news:eGv08UAm...@magnum.demon.co.uk...
>
><<snipples>>
>
>
>| And some arming vanes would rotate freely in the slipstream on the vane
>| screw until the top of the screw was reached, upon which the arming vane
>| would begin to turn the arming mechanism. This allowed the bomb to get
>| well clear of the aircraft before arming took place (a popular feature,
>| one feels...)
>|
>| Cheers,
>|
>| Dave
>|
>| --
>| Dave Eadsforth
>
>Sometimes this process goes wrong. On the 11th dec 1942 an RAAF Boston ,
>A28-12 blew up when a load of 200lb fragmentation bombs was kept in the
>aircraft's slipstream long enough to arm themselves.
>
>
>One of the bombs subsequently exploded, killing FLTLT Vernon William Morgan
>(Pilot), FLGOFF John Harold Borland (Nav/Bombardier) & SGT Ronald Thomas
>Power (Gunner)
>
>Cheers
>
>Dave Kearton
Cheers,
Dave
--
Dave Eadsforth
Dave Kearton
| In article <QtQka.149$cN3....@nnrp1.ozemail.com.au>, Dave Kearton
| <dkea...@ozemail.com.au> writes
| | >
Boston ,
| >A28-12 blew up when a load of 200lb fragmentation bombs was kept in the
| >aircraft's slipstream long enough to arm themselves.
| >
| That's a bit of a bummer - it suggests release during a high speed dive.
Possibly, more likely to be a weapon that wasn't fully cleared for that
aircraft. The Boston had been with the RAAF for less than 6 months and
those times were pretty desperate in New Guinea.
After 3 such incidents within a month, costing 9 lives - the 200lb bombs
were withrawn from RAAF Bostons.
Cheers
Dave Kearton
ArtKramr
>Date: 4/9/03 1:03 AM Pacific Daylight Time
>Sometimes this process goes wrong. On the 11th dec 1942 an RAAF Boston ,
>A28-12 blew up when a load of 200lb fragmentation bombs was kept in the
>aircraft's slipstream long enough to arm themselves.
How and under what circumstances did the arming wires get pulled?
ArtKramr
>From: "Dave Kearton" dkea...@ozemail.com.au
>Sometimes this process goes wrong.
For one such case go to my website and read, "After 55 years this still burns
my ass".
Dave Kearton
"ArtKramr" <artk...@aol.com> wrote in message
news:20030409084049...@mb-fi.aol.com...
To simplify the issue into two sentences by quoting from ....
http://www.adf-serials.com/aircrew/Aircrew%20Losses%20Part%205%20-%201942.do
c
" It was soon discovered that the bombs, when released into the slipstream,
would knock together thereby causing the premature explosion immediately
underneath the aircraft. The bombs were soon withdrawn after this
incident."
Regards
Dave Kearton
ArtKramr
>To simplify the issue into two sentences by quoting from ....
>
>http://www.adf-serials.com/aircrew/Aircrew%20Losses%20Part%205%20-%201942.do
>c
>
>
>
>" It was soon discovered that the bombs, when released into the slipstream,
>would knock together thereby causing the premature explosion immediately
>underneath the aircraft. The bombs were soon withdrawn after this
>incident."
>
>
>
>
>
>Regards
>
>
>Dave Kearton
>
If the arming wires were in place they wouldn't have exploded.I have seen bombs
roll off bomb trucks onto concrete and not explode. I have seen bombs released
from 10,000 feet with arming wires in place that didn't explode. There is more
to this story than meets the eye.
Mortimer Schnerd, RN
> To most Bomb Bay is two words. But to a select few of us BomBay
> will always be one word.
The gin?
--
Mortimer Schnerd, RN
msch...@carolina.rr.com.BARF
http://www.mortimerschnerd.com
M. J. Powell
<artk...@aol.com> writes
>>Subject: Re: propellers on WW2 bombs
>>From: "Dave Kearton" dkea...@ozemail.com.au
>>Date: 4/9/03 5:59 AM Pacific
>
>>To simplify the issue into two sentences by quoting from ....
>>
>>http://www.adf-serials.com/aircrew/Aircrew%20Losses%20Part%205%20-%201942.do
>>
>>would knock together thereby causing the premature explosion immediately
>>underneath the aircraft. The bombs were soon withdrawn after this
>>incident."
>>Regards
>>
>>Dave Kearton
>
>If the arming wires were in place they wouldn't have exploded.I have seen bombs
>roll off bomb trucks onto concrete and not explode. I have seen bombs released
>from 10,000 feet with arming wires in place that didn't explode. There is more
>to this story than meets the eye.
In the 1950s I was involved in bombing trials for the V-bombers when it
was found that at high speed (>400k IIRC) some of the lighter bombs
would not leave the bomb bay. They would hang in the slipstream for a
few moments then swing from side to side bouncing off the bomb doors.
Mike
--
M.J.Powell
whit...@stu.usd413.org
Dean Markley
Juergen Nieveler
Those are safety mechanisms... while a bomb is attached tot the
airplane, the propeller is secured by a wire. Once it drops free, the
wire pulls out, the propeller starts spinning, and after a certain
number of turns it activates the fuse.
That's to make sure the bomb has dropped far enough so that it doesn't
blow up the airplane. It's the thing that failed in the Falkland war -
the Argentinian crews had set the number of required propeller
revolutions too high, the bomb wasn't flying alonge long enough to arm
before it struck the target (because the plane dropped them lower than
planned)