Polecat 4" Bullpup

The Rocketry Forum

Help Support The Rocketry Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

MysticalRockets

Well-Known Member
Joined
Jan 17, 2009
Messages
604
Reaction score
5
Would anybody happen to have a rocksim file for the Polecat 4" Bullpup? I've seen ones for the 10", but not the 4". I'm not experienced enough with rocksim to do it.


Bob
 
Well, I grabbed the Public Enemy one. Its 4" as well. I figure I can adjust sizes and materials in there enough to get by.

Thanks!
 
Well, I grabbed the Public Enemy one. Its 4" as well. I figure I can adjust sizes and materials in there enough to get by.

Thanks!

Be sure to move the canard fins forward. The PE kit placed their canards below the NC; Polecat places them on the NC, where they belong on the real missile. The placement difference will affect your CP somewhat.
 
Be sure to move the canard fins forward. The PE kit placed their canards below the NC; Polecat places them on the NC, where they belong on the real missile. The placement difference will affect your CP somewhat.

Oh yeah, I noticed that right off.
 
Well, I was able to figure it out in RockSim. Balances really nice, in fact. And I like this forward bulkhead. There's a slot cut into it to allow me to add nose weight later on if I need to.

I'll post build pics as I go along.
 
Well, I was able to figure it out in RockSim. Balances really nice, in fact. And I like this forward bulkhead. There's a slot cut into it to allow me to add nose weight later on if I need to.

I'll post build pics as I go along.

It's going to balance nice - now, without a motor. Once you put that motor in your CG will shift drastically rearward. If you want to fly it on medium I motors or larger you most likely will need to add nose weight. IIRC, my Bullpup required noseweight for loads flown in the AT 360 case and larger. More weight for the larger cases.
 
Last edited:
I just went back and looked at it. it already had like 8 oz. of nose weight in the design. gonna have to play with that a little.
 
Last edited:
you WILL have to add nose weight, but is is a great kit and polecat kits are super tough, my wife has had chute problems on hers twice (operator error) and it has hit the desert hardpack with a thud bolth times, first time just some bondo on the boat tail and the second she cracked a fillet so I still gotta grind it out and reattach that fin(fin is fine just the epoxy)
 
you WILL have to add nose weight, but is is a great kit and polecat kits are super tough, my wife has had chute problems on hers twice (operator error) and it has hit the desert hardpack with a thud bolth times, first time just some bondo on the boat tail and the second she cracked a fillet so I still gotta grind it out and reattach that fin(fin is fine just the epoxy)

Yeah, going back over it, it best balances out with 12 oz. of nose weight. already added the weight. Nice thing is that there is a slot in the bulkhead that also acts as a ring for the canards in the nose cone that will allow me to add even more if its needed.

I'm not too worried about damage, even though it is an L1 cert. This will be on either soft sod grass or really soft dirt, after the grass has be harvested. We call it moon dust for a reason.

Probably going to use an H123 for the first shot with a 6 delay. Should get me between 1450-1500 feet. The Death Puppy is gonna fly at NERRF 5 in August.
 
you should be fine with 12oz of nose weight. juse keep in mind where cg is located and yes it's tough little kit. I have flown mine on a J330 with about 16oz of nose weight with no problem. Good luck on your L1 cert.
 
Yeah, going back over it, it best balances out with 12 oz. of nose weight. already added the weight. Nice thing is that there is a slot in the bulkhead that also acts as a ring for the canards in the nose cone that will allow me to add even more if its needed.

I'm not too worried about damage, even though it is an L1 cert. This will be on either soft sod grass or really soft dirt, after the grass has be harvested. We call it moon dust for a reason.

Probably going to use an H123 for the first shot with a 6 delay. Should get me between 1450-1500 feet. The Death Puppy is gonna fly at NERRF 5 in August.

The first problem she had was her L1, chute tangled hit hard dusted it off re packed the chute put a new motor in and tried again for a successful flight. Did her L1 with stile CTI H565.
 
Back
Top