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  #1  
Old 10-13-2014, 01:35 AM
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blackshire blackshire is offline
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Default OSC Pegasus paper model

Hello All,

I just found this (see: http://www.orbital.com/LaunchSystem...per_Pegasus.pdf ) downloadable, flying paper (110# cardstock) model of OSC's (Orbital Sciences Corporation's) Pegasus air-launched satellite launch vehicle (see: http://www.orbital.com/LaunchSystem...hicles/Pegasus/ ). With low-powered (13 mm mini motor- or 18 mm "A" motor-powered rockets), this Pegasus model could be carried aloft like the old Estes Firefly parasite boost-glider.
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Old 03-26-2018, 08:27 PM
BARGeezer BARGeezer is online now
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Clicking on the above link to the paper model pdf takes you to Orbital's home page. Here's a current link:

https://www.orbitalatk.com/flight-s...er-Airplane.pdf
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  #3  
Old 03-27-2018, 09:20 AM
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Quote:
Originally Posted by BARGeezer
Clicking on the above link to the paper model pdf takes you to Orbital's home page. Here's a current link:

https://www.orbitalatk.com/flight-s...er-Airplane.pdf
Thank you--those can change over time. I was just thinking--a "stick fuselage" OSC Pegasus glider (like the Estes Firefly parasite glider [the one whose wings and tail surfaces looked like--and may have been--from the Mini-Bomarc, making it a "SPEV boost-glider" if that was the case]) could fit closely atop a BT-20 fuselage with a Pegasus-like BT-20A nose cone, which could serve as a streamer-recovered booster. (A BT-50 booster with the similar-looking stubby BT-50 nose cone [the one used in the Estes Meanie kit, among others] could be used for a larger-scale Pegasus boost-glider model of this type; even larger ones could use the Big Bertha's BT-60 tubing and nose cone, or the Quest "Big Betty" [35 mm diameter, I think] tubing and nose cone.) Also:

If necessary for sufficient stability during boost, an extra, clear plastic ventral tail fin (for an original Pegasus model) or clear plastic "extensions" of the normal three Pegasus XL tail fins (which are evenly spaced) could be used. Such semi-scale models of the AQM-37 Jayhawk and AQM-81 Firebolt could be built the same way.
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
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Old 03-28-2018, 07:49 AM
aeppel_cpm aeppel_cpm is offline
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I made a BT50 based model using a cardstock plan with a foam core 'wing'. I used the vacu-formed PNC-50 from Apogee. With a couple sinkers glued into the nose, it flies great as a rocket. Simple streamer recovery. I didn't try to make it glide.
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Old 03-28-2018, 08:35 AM
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Old 03-28-2018, 08:41 AM
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Quote:
Originally Posted by aeppel_cpm
I made a BT50 based model using a cardstock plan with a foam core 'wing'. I used the vacu-formed PNC-50 from Apogee. With a couple sinkers glued into the nose, it flies great as a rocket. Simple streamer recovery. I didn't try to make it glide.
That sounds promising. Estes, Quest, or one of the smaller companies could produce a detailed scale Pegasus or Pegasus XL kit, which could--like the Citation Bomarc--be either parachute (or streamer) recovered, or could be a rear-motor boost-glider (with a rear-ejection, parachute- or streamer-recovered internal motor pod).
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
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Old 03-28-2018, 09:21 AM
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Quote:
Originally Posted by astronwolf
This is good--the card stock glider plans had "wandered," and OSC ATK's Pegasus website has the dimensions and moldline of the vehicle's payload fairing.
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
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Old 03-28-2018, 09:34 AM
aeppel_cpm aeppel_cpm is offline
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My earlier thread:
http://oldrocketforum.com/showthread.php?t=14866

I've never tried to trim it for gliding - but I don't think it would.

My younger boy burned through a bunch of B4 and B6 motors in it one day at a club launch. I don't recall if it was TWA or WOOSH. Prep. Fly, Recover. Repeat.
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Old 03-28-2018, 11:55 AM
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Quote:
Originally Posted by aeppel_cpm
My earlier thread:
http://oldrocketforum.com/showthread.php?t=14866

I've never tried to trim it for gliding - but I don't think it would.

My younger boy burned through a bunch of B4 and B6 motors in it one day at a club launch. I don't recall if it was TWA or WOOSH. Prep. Fly, Recover. Repeat.
I saw that one back then--and it's a model of the original Pegasus, no less (whose tail assembly [unlike the Pegasus XL's, whose tail fins are spaced 120 degrees apart]) is a conventional airplane-type one, which is "poorly configured" as a rocket tail assembly, yet your model still flies--vertically, as a ballistic rocket--stably. A gliding Pegasus model, if built larger but lighter (with a lower wing loading), might glide well, if fast. (As numerous YouTube videos show, many of the RC pulse jet model airplanes--low leading-edge sweep subsonic-type delta flying wings and semi-scale Heinkel He-162s are popular pulse jet models--glide quite fast after their engines cut out, but with low sink rates, even just before landing.)
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
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Last edited by blackshire : 03-28-2018 at 12:11 PM.
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  #10  
Old 03-28-2018, 12:10 PM
aeppel_cpm aeppel_cpm is offline
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The tail fins are 120 degrees apart. If it doesn't look that way from the pic, it's just the perspective. I think I put 5g of noseweight in it.
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