Bumper V2/WAC
 

I'd like to kit-bash an Estes #3228 V2 into a Bumper V2/WAC (round #7.) Has anyone here done it already?

Thanks!

I built mine about 2005 or so. It's the BT-80 version.

It's had about 8 or 9 flights.

No damage except...where Kermie stepped on it.

That looks great, Gordy. Do have a pattern on how you did it?

I took all of the measurements from "Rockets of the World". This was one of my first scale projects after my latest rebirths as a bar.

The WAC body tube is a BT-4, an old (don't know if they are still available) Apogee Micro Motor tube .

I made the fins from ).020 plastic.

ROTW even shows the odd fin pattern. (I redrew it and attached it.)

Don't forget the two conduit down the side of the WAC and the two spin motors.

The spin motors kinda look like the spin motors on the Honest John but there are only two on the WAC stage.

The dimensions on the drawing below I took of of my model.

That looks great, Gordon. I converted an Estes V-2 back in the '80s to fly at a contest in Houston. I deviated from scale as it was Space Systems and had to carry a NAR sand payload. I ran a BT-20+ from the bottom of the adapter up through the nose cone to put the payload as far forward as I could. I still have the leftovers somewhere. A subsequent flight and parachute failure doomed the model.

The apparent "odd" fin pattern looks that way because the fins are recessed into the V-2 nose cone.

We flew 1/24 scale Bumper WAC models at the World Championships from 2010 through 2014. The Estes kit is about 1/25 scale, so that's reallllllyyy close.

The workshop drawing for those models is attached here. The WAC sustainer models used a fiberglass tube with a 12.7mm OD, so BT5 will work if you squint. My boilerplate test models used BT5 sustainers with the nose cone from the Estes Gnome/Leprechaun.

If you'd like to see a Bumper WAC project based on the old Maxi Brute kit, check out this thread on the other forum.

James

It was one of my first attempts at a scale rocket and I already had a V-2 kit.

James, I was hoping you would chine in. :)

As for the fin shape, on mine they are full sized. I just cut slots in the nose cone.

I thought about staging the Apogee no longer had any 10.5mm motors (the body of my WAC sustainer is an Apogee 10.5mm motor tube.).

Thank you all for the info! Gordy, if you WERE going to stage the apogee, how would you have ignited sustainer, cannon fuse?

I was looking into a timer but when I shouldn't get the 10.5mm motors I gave up.