New D9 gun test!

[Seeker]

Naudet,

Check your keyboard assignments for film playback. There's an "advance frame" key which should enable you to take accurate pictures.

[Wilbus]

And the MG151 isn't as effective as in R/L. Takes a hell of alot more then 20 rounds to bring down a buff, even if you hit all 20 in one wing.

The dammage modell isn't detailed enough, it only takes in account "hwat parts get blown off" so you can hit 10x20mm in left wing, 10 in right and 10 in fuselage and the plane still flies as good as long as no parts have been blown off, in R/L the plane would have been downed due to too many holes.

 

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Rasmus "Wilbus" Mattsson
III/JG5 Eismeer

"Only the spirit of attack, born in a brave heart, will bring success to any fighter aircraft, no matter how highly developed it may be."

Adolf Galland

[This message has been edited by Wilbus (edited 04-18-2001).]

[Fishu]

 

Originally posted by Wilbus:
And the MG151 isn't as effective as in R/L. Takes a hell of alot more then 20 rounds to bring down a buff, even if you hit all 20 in one wing.

The dammage modell isn't detailed enough, it only takes in account "hwat parts get blown off" so you can hit 10x20mm in left wing, 10 in right and 10 in fuselage and the plane still flies as good as long as no parts have been blown off, in R/L the plane would have been downed due to too many holes.

   

Same for Hispano..

Actually, 24 rounds was enough to bring down a buff if i remember correctly.

[Pongo]

Your test was interesting Naudet.
Could the cowl guns be mounted out of plane with the wing root cannons?
What we need is a gunnery butt to test the guns on. Something that lets up prop up the tail and see the pattern of the rounds at different ranges.
I personaly am finding the D9 good at snap shots but poor at long range 6 shots.

[Zigrat]

same pongo

i have trouble hitting dead 6 shots, but snap shots no trouble, very wierd

[Hooligan]

Okay concerning ROF:

If some sort of interrupter mechanism is used then the gun would fire at full rate with the firing simply being periodically suspended when a propellor blade was in the way.  I don't know how to calculate firing rates for this situation.  If the guns are synchronized by some mechanical means between the propellor and the electrical firing circuit of the 151s (and I believe this is the case) then the ROF should be calculable.

Making my best guesses for ROF.

In AH the unsynchronized guns fire at 700 rounds/minute, so the syncyronized rate would be somewhat less.  The good sources I have seen on ROF for synchronized 151s usually quote a number between 600 and 650.

At 3200 RMP a propellor blade passes in front of the gun 9600 times a minute.  A synchronized gun would fire at an integer divided subinterval of this so...  this probably means 9600/16 = 600 rounds/minute or 9600/15 = 640 rounds/minute for the Dora.

For the A8 2700x3 = 8100.  8100/13 = 623 rounds/minute.  (When I measured this with a stop watch I got 630 a while back and 623 is certainly within my margin of error for measurement accuracy).

Given the stated RPMs, my guess is that the a8 is firing at 623 and the dora is firing at 600 or 640.  This is a 3% difference in ROF and I doubt it would be noticeable.

Hooligan

[mx22]

Why you people connect ROF with this issue? Smaller or bigger ROF would have no effect in any way on the way bullet flies. The only way for bullets to drop more in D9 would be if it either had different guns or different ammunition. ROF will be of importance only if you were discussing how fast you can shot down enemy plane, given every bullet you shoot finds the target.