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Martin AR-14B

boxkite

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In the mid-1960s Martin proposed a spaceplane for vertical take-off and horizontal landing designated AR-14B.

four turbofans
flight altitude 60 km
length 48,6 m
span 23,3 m

SOURCE: Der Flieger 7/1965 (page 166)
 

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Michel Van

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were ist the Heatshield on this space plane ?
 

boxkite

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Barrington Bond said:
Isn't this the lower component of the Martin Astrorocket?!

In all probability, yes. The artist's impression of the Astrorocket (= AR ?) is from Scott's APR website.
 

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Orionblamblam

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boxkite said:
Barrington Bond said:
Isn't this the lower component of the Martin Astrorocket?!

In all probability, yes.

Definitely yes.

Note: sometime around 2002, I was contacted by someone at Lockheed-Denver about the Astrorocket. Seems that someone in the USAF had expressed interest in a modernized Astrorocket, so the LM folk decided to dig up all their references on the AR to make a proper response. As it turns out, even though their facility had done the studies... they had nothing left on it. Someone googled AR, found my website, and negotiated a copy of the original Martin report.

Shoulda charged more... :p
 

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What was Martin's justification for using storable propellants on the Astrorocket? It would seem like the stage propellant mass fractions wouldn't permit TSTO using such low-energy propellants.

Also, did Martin deliberately choose the aerospike-looking nozzle for its altitude-compensating properties?
 

starviking

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Michel Van said:
were ist the Heatshield on this space plane ?

The heatshield is the upper surface. As the vehicle has a lot of tankage that will be empty on re-entry, lightening thermal loads it doesn't require a special ablative or ceramic heatshield. Note the wing will shadow the jet pods on a typical re-entry angle. Also, the cockpit area seems to be reinforced, resembling an X-15's. I've attached a pic of the AR-14B inverted for clarity. They'll need good seatbelts for re-entry.

Now if you think that's wierd, check out Post #3 in this thread, in picture Phase-B.jpg the -161Y configuration Shuttle lands upside down. Hope they designed rugged undercarriage in that one. http://www.secretprojects.co.uk/forum/index.php/topic,1928.0.html

Starviking
 

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Orionblamblam

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CFE said:
What was Martin's justification for using storable propellants on the Astrorocket?

Same logic as for the storable propellants on the Titan III ICBM: it can sit fully fueled, ready to go, for months at a time, and launch ona moments notice.


Also, did Martin deliberately choose the aerospike-looking nozzle for its altitude-compensating properties?

Yes. Martin studied a wide variety of different propulsion schemes, with aerospikes being just about the least unusual.
 

hesham

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Hi,

http://www.flightglobal.com/PDFArchive/View/1964/1964%20-%202051.html
 

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Barrington Bond

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Came across a larger pic on a mag cover - looks like the wheels are made of wire :-\
 

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Orionblamblam

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A vintage Martin poster of the Astrorocket, recently on ebay. I didn't see the listing until about one second before I hit the "buy it now" button...

s-l1600.jpg
 

KHambsch

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A vintage Martin poster of the Astrorocket, recently on ebay. I didn't see the listing until about one second before I hit the "buy it now" button...

s-l1600.jpg
Did you buy then re-sell it? I think more than one have been sold and purchased. K
 

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