According to answers.com:

I need this so I can calculate the Ballistic Coefficient for a mod I am working on.

Can anyone help me? (I don't mind if it's for either of the warheads for the PzSchreck).

Many Thanks,

Oli

What exactly do you need mate, I'm not too clear, just the warheads or the weapon itself?

I've got the schreck listed at 1.64m(43), 1.64m(54) and 1.35m(54/1), (from Terry Gander's 'Bazooka' & other books) all projectiles were 88mm so that must give a reasonable tube 'width'. I'm assuming you're after more than that though? Got more accurate drawings for Faust projectiles but not sure if I have on the schreck.

Cheers,
Adam.

__________________
It's only the Internet.

well lucky you Oli

I own a Panzerschreck 54

what are your questions please, yours are a bit too high tech for this Opa, could you come down to my level bitte ?
__________________________________________________ ______________

tube width is in inches : 3 3/4rs

tube length is in inches : 64 and 5/8ths

shield dimensions are in inches : 16" high x 13" wide

anything else ?

E ~

Yes just the warhead.

Luckier than me, I'd kill to have a real PzSchreck

Could you get some pictures of the sights? (Teams modellers still aren't sure how to model it.)

I need to work out the Ballistic Coefficient needs for 4 parts to calculate the formula, i'm not too sure myself what Form Factor is myself, I think it might just be length x width = FF, don't mistake depth (88mm) for width

In terms of ballistics, the form factor as generally used with shells and bullets is irrelevant to the panzerschrek rocket. This is because it is simply too slow in flight (subsonic) to have any real effect on the round.
But, to answer your question, the form factor has to do with the shape of the round. The olgive length is compared to the length of the round itself. The British in the WW 1 period called it caliber head radius. Basically, the form factor is the ratio between the length of the round, its diameter, and the lenght of the "pointy part" at the front.
Given the odd shape of panzerschrek rounds it is probably going to be very difficult to calculate. But, it is also likely to be irrelevant due as I said to the low velocity of the round.

hmmmmmmmmmm ok whatever you guys decide on that

I'll try and get photo
-views of the front and the sight within the framework of the shield soon and post here

in inches : the front sight at the end of the tube sits 4 1/4 tall by 3 1/4 wide

http://en.wikipedia.org/wiki/Ballistic_coefficient

So, Gardner, assuming your theory what would be the new formula/one I need to use?

I need a picture like this one but more close and more detail please.

http://www.theeasternfront.co.uk/Gra...zerschreck.jpg

ok let me get this right then ............

a close up of the shield and or the sight and also a closeup of the rear charging unit ?

ok friend let's see if these are too big

rear end unit and tube :

Well, what is it exactly that you are trying to determine? The flight characteristics of the rocket? Its trajectory? Flight time? Impact energy?
Remember, the panzerschrek only has a maximum range of right at 200 yards and about 100 to 150 yards accurate range. So, many of its flight characteristics are largely, if not totally, irrelevant in terms of overall systems performance.

Nice one Erich!

Can you get one the end sight and what they look like when lined up, that would be smashing!

I need to work out the Ballistic Coefficient, I need these 4 things acorrding to wikipedia, you say the form factor doesn't matter for the PzSchreck so I only need three?

-Sectional density = 4.28
-Mass of object, lb or kg = 7.25 lb
-Diameter of the object = 3.46 in

Wikipedia (using all 4):

So assuming I don't need form factor (i), what would the formula look like?

Great pic Erich, I especially like the very appropriate "Tank Killers" book on the shelf.

__________________

WWII Forums Rogues Gallery - send in your photo!
Comments, questions or feedback? Contact me at

"The only good is knowledge and the only evil is ignorance." Socrates

For a panzerschrek it is not so easy to calculate its theoretical ballistic properties as for a bullet or shell. The formula you refer to is used with the later. With a parzerschrek the round is not consistant in diameter along its length. The warhead and its fuzing section on the front are not a smooth curve. It also has the circular cap and fins for stability on the rocket end to contend with.
About all I could suggest is that you develop a series of equations for each seperate sectional diameter from front to back and then integrate these using standard calculus methods for three dimensional objects (eg say solving using matricies) and then calculate the definite integral from the resulting formula.
The method for calculating ballistic coefficents of bullets and shells simply will not work here.