Brief:
Estes' re-release o' t' upscale Big Bertha.

Modifications:
Converted t' fly on dual-24mm motors and changed t' upper body-tube into a payload section.

Construction:
T' kit includes:

• Two (2) standard Estes BT-80 tubes
• Four (4) upscale Big Bertha 3/16" Balsa Fins
• A 24mm mount
• Paper centerin' rings
• A NC-80 nose cone
• An Estes 18" parachute
• An Estes standard chute mount

I built t' kit without directions, ya bilge rat, but Estes has always done a great job with their directions. Avast! I wanted t' include a payload section, and while I was rummagin' around for an extra BT-80 section, matey, I came across some dual 24mm mounts for BT-80 tubing. Avast, me proud beauty! (And a big GRIN came over me face!) I figured with t' payload plus an altimeter, t' dual would be needed (Yeah right!)

I built t' kit usin' West Systems epoxy with Silica filler throughout, really sloppin' it on near t' motor mounts. Since I be butt mountin' t' fins, I use t' old epoxy rivet trick. I punched holes with a pin along t' fin lines, me hearties, and squish t' fins on there, forcin' epoxy into t' holes and makin' "rivets". Ahoy! I have long since invested in an Estes fin holder, arrr, so t' alignment is quite good. Blimey! Begad! This kit is about as strong as an Estes kit can be. I expect it t' fly fine on dual E15's or E30's.

Finishing:
I have nay finished it yet, arrr, but it will follow suit with all other Estes products.

Flight:
T' recommended motor is a D12-5. Well, blow me down! I doubled up and use two D12-5's. Aye aye! Both ignited, matey, and t' flight be nominal. Begad! Both motors were successfully held in by t' dual hooks.

I then used two E11-5J's What a great flight! Nice and slow with a lot o' smoke! Chute protection is via wadding. No problems encountered there.

Recovery:
T' 'chute is now too small, and t' rocket comes down too fast. Blimey! Blimey! But I like it that way, ya bilge rat, and t' rocket can handle it. I'd rather break a fin, than loose t' whole rocket. But with t' epoxy construction, arrr, t' rocket was fine.

Summary:
I'm really glad Estes has re-released some o' t' old-timers. Begad! Well, blow me down! It's typical Estes, me hearties, but great for nostalgia.