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Old 08-19-2018, 05:02 PM
erik442's Avatar
erik442 erik442 is offline
The Alpha Kid
Join Date: Mar 2012
Location: central PA
Posts: 31
Default Fireball XL5

Been working on this one for ages. From the 60's TV series. Parts from Semroc as well as plenty of found objects such as magic marker caps, fountain pen cartridges, plastic mesh, etc.
Main body is a BT-70 running full length with a BT-80 rear section. Most of the small bits are made of carved balsa. I hand cut all the XL5 decals from sheet vinyl using a swivel hobby knife. It is heavy at 23 oz. and measures 27" long with an 11" wingspan.

I had hoped to use an E12, but the finished weight will demand a composite F motor. I'm concerned about the forward fins, so I may use a conventional nose cone for a flight attempt. My wife thinks I'm crazy to fly it at all and risk damage. Balance was difficult to obtain and there is a ring of lead bars epoxied in just behind the nose cone shoulder. I made them by hammering .440 lead musket balls into small rectangles. I didn't want to put that much weight into the nose since it might be too much for the ejection charge to push. I picked up a 30" nylon chute for a gentle descent.

Ever notice how really interesting old sci-fi ships seem to break all the rules of aerodynamic flight when you try to model them?
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Old 08-19-2018, 05:23 PM
John Brohm's Avatar
John Brohm John Brohm is offline
NAR #78048
Join Date: Feb 2005
Location: Mars, PA
Posts: 583

An outstanding result! Very well done. I think your wife may have a point!
SAM #004
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Old 08-19-2018, 05:30 PM
OKTurbo OKTurbo is offline
Intermediate Rocketeer
Join Date: Aug 2005
Posts: 42

Very nice! You could use dual chutes. One for the heavy cone and one for the main....but thatís just more weight in it too.

It does look awesome....
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Old 08-19-2018, 05:54 PM
Bob Austin Bob Austin is offline
Junior Rocketeer
Join Date: Aug 2018
Location: Alabama
Posts: 5

Gerry Anderson would be proud!
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Old 08-19-2018, 06:14 PM
Vanel Vanel is offline
Master Modeler
Join Date: Jun 2005
Posts: 714

Absolutely fabulous!!!!!!!!
Up next:
Under construction:
Under repair:
In finishing: Centuri Sky Devil clone
In primer: Sky Bird II (Estes Rocket Plan #2), Estes Lancer
In paint:
Ready for decals: eBay rescue Mark II

Bill Cooke
NAR #31312
SAM #0001
Huntsville, AL

My rocket blog
My rocket fleet
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Old 08-19-2018, 06:44 PM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
Join Date: Jul 2005
Location: Michigan
Posts: 8,833

A G40 SU or G64 RMS 40/120 would be just about right for it.
When in doubt, WHACK the GAS and NEVER touch the brake !!!
No Harm=NO Foul advocate

If you are NOT FLYING LOW in the left lane, you need to GET THE #$&@ OUT of it !

Yes, there is such a thing as NORMAL
, if you have to ask, you probably aren't
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Old 08-19-2018, 10:41 PM
burkefj's Avatar
burkefj burkefj is offline
Join Date: Feb 2009
Posts: 301

Excellent job! Mine isn't as scale and is a bit bigger because it was designed to glide, but this is the nicest scale one I've seen.
RC Rocket glider kits
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Old 08-19-2018, 10:55 PM
A Fish Named Wallyum's Avatar
A Fish Named Wallyum A Fish Named Wallyum is offline
BP Mafia
Join Date: Mar 2005
Location: Ft. Thomas, KY
Posts: 6,910

Bill Eichelberger
NAR 79563

I was SAM 0058

On the build floor: Centuri Stellar Hercules, Semroc SLS Scorpion, Semroc Squire, RDC V-Max

Ready to fly: Canaroc Green Hornet, Estes Astron Farside X, FSI Eos, FRW Magnum Spartan, Centuri Stellar StarLifter, Estes World Federation Star Probe, Estes Astron Apogee
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Old 08-20-2018, 02:07 AM
Royatl's Avatar
Royatl Royatl is offline
SPEV/Orion wrangler
Join Date: Mar 2005
Location: Atlanta, GA
Posts: 2,261

That is so excellent.

I've had a bt-70 and bt-80 raring to go for about ten years but never started building it. I was going to build a boilerplate first to fly to check stability before building a detailed version, but you went directly to full detail. Well done.
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Old 08-20-2018, 08:26 AM
Feyd's Avatar
Feyd Feyd is offline
Master Modeler
Join Date: Feb 2010
Location: San Antonio, TX
Posts: 656

That is amazing! Great job on the detailing.
Dale Marshall, San Antonio Texas
NAR #90990
Semroc SAM #083

BAR Since 2008
Enjoying model rocketry since 1977.
The Spotted Dragon
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