There's No Place Better - EMRR! EMRR Rocks!
the basic, real and invariable nature of a thing!

 

6 Guests On
  myEMRR
[Logo]

REV 2.4 - Tue Aug 17 04:34:53 2010

OOP
Estes Industries
Condor
  All   More Like This   Previous   Next

SPECS: 18.25" x 0.976" - 1.0 oz
ROCKSIM FILE: MISSING - please submit here
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: 1/2A2-2T, A3-2T, A3-4T

(Contributed - by Bill Eichelberger [Who's Who Page])

Rocket PicBrief:
Back in 1977, the Condor was the second rocket I ever owned and the first "big" rocket I ever flew. (The Beta was my first.) This was my most prolific flier, and bore the battle scars on both booster and glider to prove it.

Construction:
Materials: (according to original plans. I used the closest thing available.)

  • 1 - BT-50
  • 1 - PNC-50 3/32" balsa stock for fins and glider body
  • 1/16" balsa stock for glider wings and canard
  • 18mm Engine mount from Estes Regular Engine Mount kit
  • A too short length of shock cord

I had been planning to build this from memory, but back in February my brother-in-law and I discovered JimZ's OOP Estes plan site on a Friday night, and on Saturday I hit a local hobby shop and by late afternoon, had all of the parts needed to recreate the Condor. One change that I made was to upgrade the kit from the original 13mm engine to an 18mm. This was something that had always puzzled me about the original. It always seemed a bit big for a mini-motor, but I guess Estes had their reasons. Back then it made sense for me from an economical standpoint, (I got an extra flight per package,) but now that money is no object, I decided to power it up a bit.

Back when I built the original I just slapped it together with glue, painted it, decal'd it and got it in the air as quickly as possible. It flew great! This time I was determined to take my time and employ some of the techniques I had learned about over the 24 years since I built the original. I carefully shaped the fins on the booster, determined to make it as aerodynamic as possible. I also used several coats of thinned Elmer's Fill'n'Finish as a sealer, sanding between coats. Elmer's glue was used both to attach the fins and to create the glue fillets to keep them in place.

The glider was lightly sanded, then sprayed with a coat of Walmart white paint, the same as the booster. I then masked off the front portions of both the glider and booster and sprayed them with Walmart red. It never occurred to me to use the Fill'n'Finish to fill in the body tube spirals or use primer. (Then again, neglecting to do this made it look a lot more like my 1977 original.) JimZ decals completed my retro project.

Flight:
The Condor originally flew on 13mm motors, so I had no benchmark to go on in determining motor selection. Because of this I chose the reliable old Estes B6-4 for the first flight. Fireproof insulation (treated shredded newspaper) was used as recovery wadding, and worked flawlessly. It's available in bulk at most home improvement stores and a little goes a long way.

The flight was straight and stable into a light breeze, picture perfect until the ejection charge went off. The sound that the nose cone made when it rebounded back into the body tube was clearly audible on the ground. The glider, which I had trimmed by sticking straight pins into the nose and which had flown so well when I had tested it the previous weekend, made a beeline for the ground on an 80-degree angle and broke on impact just behind the canard. The booster's 12" parachute worked perfectly, and the only evidence of contact between body tube and nose cone was a light scrape, almost a smudge, on each of them.

I flew it one more time that day on a stray Estes A8-3 that had been rolling around my range box for a few months. This time the flight was understandably lower and glider-less, and the sound of the nose cone and body tube meeting was once again clearly audible. My luck didn't hold out this time. The top of the body tube was badly crushed, but repairable. In this sense it was a lot like the old days. It seemed that I was always repairing my original Condor after either the booster or glider made contact with one hard surface or another. (We flew out of an asphalt parking lot back then.)

Summary:
While it was great seeing the Condor on the flight line again, and the flight itself was very satisfying, the glider's suicide dive and the short shock cord rained on my parade a little. PRO'S: The upgraded engine made for a much improved flight and it's always great to see an old timer fly again. CON'S: Cheap feel to the balsa. Glider performance. Shock cord too short. Worst of all, my original is probably a part of a landfill somewhere.

Other:
1) Don't be stingy with the shock cord. Just because Estes does it doesn't mean you have to. Treat yourself to some quality elastic and some Kevlar®. 2) Use Elmer's Fill'n'Finish for not only the fins, but to fill in the spirals in the body tube.

[Submit your Opinion]

GUEST's OPINION:
08/02 - "I too built the Condor back in high school, although I built it after some years of experience. Then, it struck me as sort of a beginner's Orbital Transport. but the flights were reliable, and I still recall the thrill of one particular flight when the glider spiraled back almost right to the launch pad. hmmm.. I just might have to build one again, myself..." (T.C.)

GUEST's OPINION:
06/01 - "Thanks for the trip down memory lane! I got one of these back in `78, and only flew it a couple of times because I was getting more interested in high school than playing with "toys." I too wondered why it had a wimpy 13mm in it, but I reasoned that with just one glider, the thing would be horribly out of balance with more thrust, and would simply arc over into the ground. So I devised a scheme to add 2 identical gliders, one on each side, and the thrust of a C6-7 would be perfect. But like most of us, interest waned in those years, and I never did it. But thanks to Jim Z, I have a second chance. Hmmm, where's that scrap balsa pile... No, never had a problem with mine in flight." (K.R.J.)

[Enter Rocket Specific Tip]

SPECIFIC ROCKET TIP:
06/02 - "When trimming the glider for flight, I've found that a common paper clip over the nose of the glider makes for the best glides. When I built mine as a kid, they only had silver clips, so the glider looked like a bad piece of '70's Detroit rolling stock, but today it's possible to find colored paper clips. " (B.E. )

[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
08-08-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record - I was always impressed with the way this one performed, despite the fact that I don't remember putting any dihedral into the glider wings. Guess I was just lucky.
08-08-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record -
08-17-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record -
08-17-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record -
09-18-1977 Bill Eichelberger Est SU A10-3 Apogee - Perfect 0-5 mph winds - Very anti-climactic flight coming on the heels of my Alpha's one and out flight. That kind of killed the rest of the day for me.
09-18-1977 Bill Eichelberger Est SU A10-3 Apogee - Perfect 0-5 mph winds -
10-16-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record - Final flight of 1977. Glider broke apart after whacking slide in local park. Repaired for 1978 season. (This kind of thing happened a lot with the Condor.)
10-16-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record -
10-16-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record -
10-16-1977 Bill Eichelberger Est SU A10-3 Didn't Record Didn't Record -
04-29-2001 Bill Eichelberger Est SU B6-4 Just Before 0-5 mph winds - Slight bruise on booster from nose cone rebound. Glider broke in half on impact.
09-05-2004 Bill Eichelberger Est SU C6-5 Very Late 0-5 mph winds - Windcocked badly. Ejection charge fired just as impact seemed like a certainty. Glider recovered and flew beautifully while nose cone and body tube seperated. Surprisingly recovered all parts.
05-28-2005 Bill Eichelberger Est SU A10-3 None - CATO 5-10 mph winds Event: Quark Section Launch
- An A10 CATO? You betcha.
05-28-2005 Bill Eichelberger Est SU A10-3 Very Late 5-10 mph winds Event: Quark Section Launch
- Barely cleared the rod. Ejected just before the ground and dug the nose cone an inch deep. Apparently the A10 isn't the motor it once was.
10-15-2005 Bill Eichelberger Est SU B4-4 Apogee - Perfect 5-10 mph winds Event: Bored And Felt Like Flying Launch
- Impressive flight. Glider needs trim help.
04-27-2002 Michael Mangieri Est SU A8-3 Didn't Record 5-10 mph winds - Low altitude (as expected). Nose of booster and rear glider mount broke-off at ejection. 1 glider had OK glide - the other nose-dived into the ground. All-in-all, I had to recover 6 parts! :(
06-26-2004 Mike Mistele Est SU 1/2A3-2 Apogee - Perfect 5-10 mph winds - First flight for my clone. Arced in flight, but not too badly. Booster recovered perfectly. Glider fluttered until about 15' off the ground, then finally glided to a soft landing.
07-02-2004 Mike Mistele Est SU 1/2A3-2 Apogee - Perfect 5-10 mph winds - 2nd flight. The 1/2A is clearly not enough motor, may have gone up 100' or so. Very similar flight to last time; booster came down safely (right on top of the launch controller), while glider fluttered down.
07-19-2004 Mike Mistele Est SU A3-4 Apogee - NC Down 5-10 mph winds - Ugly. Serious weathercocking, then the parachute didn't deploy (too much dogbarf wadding). Booster core-sampled, top of BT dented, one fin cracked. Will try to repair. At least the glider worked this time.
   

Please Help Make Us Better!   

•  Copyright ©1998-2009  •   EMRR   •   Legal/Privacy   •   Disclaimer   •