Brief: After a spell of creative scratch rocket projects, all my fun ideas seemed to have dried up. Looking around the workshop, I smiled at good old Fat Boy: both my kids and my favorite rocket. He's always good for an exciting flight and safe recovery. Why not court disaster by trying to improve ...

I always loved the versatility of the Estes Fat Boy, and over the years I bought quite a few of them for different projects, most of them of the Goony persuasion.  When a fellow club member decide to move away from low power and offered one for sale from his stash, I jumped at the ...

The ATTABOY is a boattailed FATBOY with 24mm upsized motor mount that can be flown in two different configurations--both with and without upper payload tube. Modifications: I was inspired by Michael Bade's " Big Bad V-2 Daddy ", Kevin Johnson's " OY!FATBOY ", and David Fergus' " Boattail FATBOY ...

This project began when I read several posts from rec.model.rockets on placing a 24mm motor mount in a Fat Boy, normally a 18mm kit. I first looked at the instructions and made a list of what I needed to do. Replace the 18mm motor tube with a 24mm one Make bigger motor mount with modified ...

This project begun when I read several posts from rec.model.rockets on placing a 24mm motor mount in a Fat Boy, normally a 18mm kit. I first looked at the instructions and made a list of what I needed to do. Replace the 18mm motor tube with a 24mm one Make bigger motor mount with modified ...

An Estes Fat Boy modified with a 24mm MMT for D and E motors. External dimensions are stock. These modifications change one of Estes best packaged kits into a true performer. Modifications: Construction sequence was pretty normal for a MPR capable rocket: forward CR epoxied to the MMT, shock ...

  An Estes FatBoy modified with a glassed body tube, 29mm MMT and G10 fins for F, G, and H motors. External dimensions are stock. Best "bang-for-buck" rocket that I ever built. Modifications: When glassing the tube, I used a long section of PML 2.6" coupler tube wrapped in greaseproof ...

  The problem with overpowering a "stubby" design like the C-powered Estes Fat Boy with heavier engines is the CG dilemma -- the more power, the more nose weight is needed to keep the CG in limits, negating the Oomph you thought you were adding. I have modified Fat Boy for F-power with a ...

Took a Fat Boy kit and added Big Bertha like fins to make a Super Baby Bertha. Modifications: NARHAMS held a Fat Boy theme sport launch this month, and I was looking for something different to do with my last Fat Boy kit. I had just finished repairing my Super Big Bertha when inspiration ...

Kit bashed two Fat Boys into one two-stage rocket. Modifications: After building the sustainer per the instructions, I started the booster by building the motor mount/center rings. Using the completed mount as a guide, I marked the aft end of the second BT and cut it down just in front of ...

Brief: Modified BoatTail FatBoy with a D engine mount, sturdier construction throughout, and better fly-ability with a boat tail. The basic dimensions of a stock Fat Boy were maintained for both body length and fin shape and size. Modifications: Body Tube: Cut the main body tube 5 1/8 inch ...

This Fat Boy flies on seven 18mm motors. Modifications: Here is what I changed: The base of the cone was cut off The stock centering rings were not used Additional 18mm motor tubes were added Parts list: Estes Fat Boy kit 18mm tubing for the 6 additional motor ...