Urchin Our fuse is both though. It will go off on contact with an enemy plane. Lazer, Ely, Rugby, and Fork all landed direct hits on bombers we were flying in the DA and wiped out either 2 or 3 bombers in the formation. This was from a range of 700-800 yards.
Hmmmm. When was this? I've been trying to get these rockets to do damage since they 1st appeared in AH but have never succeeded.
My own experience is as follows: I have never observed an impact explosion, no matter what I aim at. This includes the ground and buildings. The only way the rockets explode for me is purely time-based. They always explode a constant time after launch, but ONLY if they haven't hit anything beforehand. This being the case, the range seems to be a function of speed. As a result, I made many practice offline hops using the .target XXXX command until I learned at what range they explode if you've matched speeds with a B17 (about 1200m), and how to aim so as to hit a B17 at that range.
I wasn't able to find a volunteer target drone until this year's AH Con. And the results were highly disappointing. This guy let me match speeds with him and watched from the tail gunner position as I fired at the range I had determined. While it looked to me like I was getting bursts right on him, he got nothing at all. No damage, nor did he even see the rocket trails or the explosions. He kept asking me if I was shooting. When I ran out of rockets, I tried the guns and they worked fine. He shot back and his worked fine. So I had to conclude that the rockets just don't work at all.
HT of course was at the Con. So after the above fiasco, I managed to catch him in a 1/2way sober moment and pumped him for info on the rockets. Why couldn't my target even see me launch them? What are the launch parameters? What's the best point of aim? Is there any way to get an impact explosion or is it all timed? But HT just said that he put them in the game so long ago he didn't remember anything about them.
All that aside, I think it's kinda strange the rockets do NOT explode on contact with the ground. That's what they were designed to do, after all. The things were just ground-to-ground rockets hung under planes, they weren't designed for air-to-air work. And most German time fuzes were combination time and impact.