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REV 2.4 - Tue Aug 17 07:32:16 2010

OOP
Estes Industries
NASA Pegasus
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SPECS: 20" x " - oz
ROCKSIM FILE: Right Click to Download
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: A8-3, B4-2, B6-4, B8-5, C5-3, C6-3

Rating
(Contributed - by Bob Harrington - 11/23/04) (OOP) Estes Pegasus

Brief:
This was originally produced by Estes Industries and is currently out of production (OOP). Plans were obtained from Ye Olde Rocket Shoppe. Design was for an 18mm mount with a parachute recovery.

Construction:
Design has four fins with 2 representing wings and 2 rudders. Two long sections of body tube represent scramjets.

(OOP) Estes Pegasus Components:

  • 1 BT-55 body tube 14" long
  • 2 BT-50 body tubes 6.5" long
  • 1 BT-20 engine tube 2.75"
  • 2 CR2055 centering rings
  • 1 Engine hook 2.75"
  • 1 BNC-55AO nose cone
  • 3/32" fin stock
  • 36" shock cord
  • 18" parachute
(OOP) Estes Pegasus

The instructions were very straightforward and followed a logical sequence, however, it did not mention sanding the root edge of the wings at an angle to fit tight against the body tube. I also sanded the root edge of the rudders into a 'V' shape to fit tight between the main body and scramjets. I put in the standard 18mm motor mount in the main body tube and later added 13mm motor mounts in the scramjets. I used the standard tri-fold shock cord mount and an 18" parachute. No nose weight was required for the standard configuration but I added weight after adding the additional motor mounts.

I had all of the parts needed for construction at hand with the exception of the nose cone which I bought from BMS.

Finishing:
The model was given an overall coat of white paint and the decals were applied to give the desired look. The decal scan from Ye Olde Rocket Shoppe was grainy so I cleaned them up using Microsoft Paint. The flag decals lacked stars so I substituted flags that I had made myself. The blue was too light for the flag so I used a darker shade of blue. I printed them on Bels decal paper and coated them with Krylon Crystal Clear before application.

Construction Rating: 4 ½ out of 5

(OOP) Estes Pegasus

Flight:
I flew the model for 3 flights on a single motor and then added the motor mounts in the scramjets.

First flight was on a B4-4 and the flight was straight but arched over and ejection was past apogee. The second flight was on a B6-4 and ejection was still past apogee but just barely. The third flight was on a day with winds in the 15-18 mph range and on a C6-3 and the rocket went up straight but the back end displayed a lot of undulation possible due to the asymmetrical design and the high wind.

After adding the motor mounts in the scramjets, I flew it twice on a combination of C6-5 main and A10-PT in the outboards. Flight on this configuration was nearly perfect with a high straight flight and ejection at apogee.

Recovery:
I used the standard Estes type tri-fold mount with a 36" piece of 1/4" sewing elastic. Recovery on an 18" plastic chute was acceptable for the large field I was flying on with all recoveries (except for the high wind day) within 100' of launch pad.

Flight Rating: 4 ½ out of 5

Summary:
I really enjoyed this clone. It has that futuristic "space plane" look that I personally am attracted to.

Overall Rating: 4 ½ out of 5

[Submit your Opinion]

GUEST's OPINION:
08/07 - "I got this kit from Estes years ago. It did not include the motor mounts in the scramjets, but I like the added touch. This is my favorite model. It is sturdy and flies straight for me. I like that is changes up the standard tube with fins design. I was upset the Estes discontinued it because it provides a medium to easy transition to some of their more complex models." (J.R.)

[Enter Rocket Specific Tip]

SPECIFIC ROCKET TIP:
06/08 - "A few months ago I cloned one of my favorite kits from many years ago the Estes NASA Pegasus. I was considering leaving everything stock. But instead I beefed up the recovery with a length of Kevlar cord. The NASA Pegasus has 2 Engine tubes along the sides above the wings. I really deviated from the original by making the kit cluster with 2 13mm engines in the side engine tubes. But I kept the center tube 18mm. Also to improve the rockets performance I put cones inside the engine tubes. This reduces the drag and to me makes the rocket look nice. The engine tubes are now similar to the SR-71 Blackbird engines. For the first flight (non clustered), everything went well. The rocket leaped fro the pad nicely with a slow roll. At apogee the chute popped open and the rocket drifted slowly to the ground under some 18 inch plastic. " (K.L. )

[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
10-02-2004 Bob Harrington Est SU B4-4 Just Past (1-2sec) 5-10 mph winds - perfect recovery about 100' from pad.
10-02-2004 Bob Harrington Est SU B6-4 Apogee - NC Down 5-10 mph winds - perfect recovery about 100' from pad
10-23-2004 Bob Harrington Est SU C6-3 Apogee - NC Up 10+ mph winds - Rocket acted a little squirrely. perfect recovery 200+' from pad.
11-06-2004 Bob Harrington 1x Est SU C6-5/2x Est SU A10-PT Apogee - NC Up 10+ mph winds - Perfect
11-20-2004 Bob Harrington 1x Est SU C6-5/2x Est SU A10-PT Apogee - NC Up 0-5 mph winds - Perfect. Recovery within 50' of pad
04-17-2005 Bob Harrington Est SU C6-5 / 2x Est SU A10-PT Apogee - Perfect 0-5 mph winds - Perfect flight in very light wind
10-22-2005 Bob Harrington 1x Est SU C6-5 / 2x Est SU A10-PT Apogee - NC Up 5-10 mph winds Event: CMASS section launch
- Wind had picked up and rocket wobbled in the boost phase probably due to the large asymetrical wings. This rocket is a great calm weather flyer.
10-20-2007 Bob Harrington Est SU C6-5 Apogee - NC Down 5-10 mph winds Event: CMASS section launch
-
07-08-2006 Geoffrey Kerbel Est SU B6-4 Apogee - NC Up
(300' or so ft)
0-5 mph winds Event: Local park
- Rocket has a bad twist and turning on way up. Maybe too violent with bigger engine. Good flight otherwise.
   

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