Author Topic: Hotol 2  (Read 1293 times)

Offline Seer

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Hotol 2
« on: 01/17/2011 07:29 PM »
Can someone explain why the air launched Hotol 2 needed 4 rd 0120 engines?
http://www.astronautix.com/lvs/inthotol.htm.  This gives an initial T/W ratio of over 3 which seems much too high.

Offline Joris

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Re: Hotol 2
« Reply #1 on: 01/20/2011 08:47 PM »
It appears that the weight of HOTOL (250t) is less then that of MAKS (275t) according to encyclopedia astronautica. But HOTOL is longer (44m to 39m) and wider (10m to 6.38m). MAKS had a not extraordinary T/W of 1.4, so my guess is that the 250t weight of HOTOL is too low, since the thrust is higher and so is its size.
JIMO would have been the first proper spaceship.

Offline Seer

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Re: Hotol 2
« Reply #2 on: 01/21/2011 04:07 PM »
It appears that the weight of HOTOL (250t) is less then that of MAKS (275t) according to encyclopedia astronautica. But HOTOL is longer (44m to 39m) and wider (10m to 6.38m). MAKS had a not extraordinary T/W of 1.4, so my guess is that the 250t weight of HOTOL is too low, since the thrust is higher and so is its size.

No, the Maks length and diameter are smaller because it refers to a small winged orbiter plus external tank configuration.
Is it possible that two of the rd-0120 engines are in the an-225 plane?

I believe someone who might know the answer is a poster on this forum named Hempsell who works for Reaction engines. If he wants to chime in I'd be grateful.

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