BAe HOTOL

2-1-HOTOL_02.jpg


malta_1991_space_mi_855.jpg
 

Attachments

  • 2-1-HOTOL_02.jpg
    2-1-HOTOL_02.jpg
    48.5 KB · Views: 55
  • malta_1991_space_mi_855.jpg
    malta_1991_space_mi_855.jpg
    68.4 KB · Views: 366
hesham said:
Hi,

the BAe HOTOL projects;
http://www.flightglobal.com/FlightPDFArchive/1988/1988%20-%200537.pdf
Click to expand...

Hi,

http://www.flightglobal.com/pdfarchive/view/1991/1991%20-%203290.html
 

Attachments

  • HOTOL.JPG
    HOTOL.JPG
    29.5 KB · Views: 141
Just a note: As I understand it, there were two different projects under the HOTOL name: The original HOTOL, and the HOTOL 2 (or "Interim HOTOL"). The latter was a much less ambitious project using fairly ordinary rocket engines for a mid-air start off the back of an AN-225. This was, again as I understand it, intended as a stop-gap launcher until the Full Monty became available, air liquefying engines and all.

Regards & all,

Thomas L. Nielsen
Luxembourg
 
Lauge said:
Just a note: As I understand it, there were two different projects under the HOTOL name: The original HOTOL, and the HOTOL 2 (or "Interim HOTOL"). The latter was a much less ambitious project using fairly ordinary rocket engines for a mid-air start off the back of an AN-225. This was, again as I understand it, intended as a stop-gap launcher until the Full Monty became available, air liquefying engines and all.
Click to expand...

that's true HOTOL 2, nickname in some forums as "Super Deform" HOTOL ;)
was cheap Interim version to expensive to Developed air liquefying engines version

mmm... Monty ? dit you mean Money Thomas?
we have good "spell check" in this forum B)
 
I assume he refers to this:

http://www.phrases.org.uk/meanings/full%20monty.html

http://en.wikipedia.org/wiki/The_Full_Monty

Martin
 
Michel Van said:
Lauge said:
This was, again as I understand it, intended as a stop-gap launcher until the Full Monty became available...
Click to expand...

mmm... Monty ? dit you mean Money Thomas?
we have good "spell check" in this forum B)
Click to expand...

Ummm... "Fully Monty:" http://en.wikipedia.org/wiki/Full_monty
 
martinbayer said:
I assume he refers to this:

http://www.phrases.org.uk/meanings/full%20monty.html
Click to expand...

You assume correctly, kind Sir.

Regards & all,

Thomas L. Nielsen
Luxembourg

PS: Considering the number of posts dedicated to this seemingly innocuous (http://www.thefreedictionary.com/innocuous) use of English slang, I shall certainly attempt to abstein (http://www.thefreedictionary.com/abstain) from such frivolity (http://www.thefreedictionary.com/frivolity) henceforth (http://www.thefreedictionary.com/henceforth) ;D
 
HOTOL intakes as of June 1987
http://www.flightglobal.com/pdfarchive/view/1987/1987%20-%200985.html
 

Attachments

  • HOTOL intakes.jpg
    HOTOL intakes.jpg
    638.7 KB · Views: 757
HOTOL program official patch
 

Attachments

  • HOTOL Patch -.jpg
    HOTOL Patch -.jpg
    157.4 KB · Views: 643
some information about this
index.php

BAe proposed HOTOL as hypersonic passenger craft !
a passenger pod (50 person) install in Cargo bay

launch from this sledge at 290 knots it makes powered climb to 180 miles at mach 6
then reenter the atmosphere and glide to airport for landing
London -> Sydney in 45 Minute

odd in source, HOTOL fly this under remote control
while the picture show a cockpit on passenger pod

Manned HOTOL
BAe wanted a fleet with 5 to 6 HOTOL Wat one of them is for Manned flight into space

Source:
"The Dream Machines" by Ron Miller
page 602-603

in 1990 British Aerospace Ltd. presented a alternate European space station designs for ESA
were HOTOL resupply the Station in Orbit
http://www.astronautix.com/craft/briation.htm
http://www.astronautix.com/graphics/l/ltsas90e.gif
 
The windows at the top of the passenger pod look like cockpit windows. Were they planning to put pilots on-board (if only to reassure the passengers ;)), or was it simply a viewing point?
 
FutureSpaceTourist said:
or was it simply a viewing point?
Click to expand...

like the Lounge on early Boeing 747-100 ?
good view for a cocktail ;D
 
Hotol note from Flug Revue May 1994
 

Attachments

  • img368.pdf
    708.6 KB · Views: 86
Btw, some more on its front rudder. I assumed previously it was there because of the larger moment arm. Recently I've been looking for info on the web about front rudders. I've found virtually no technical info on the subject, I do know however the Wright brothers used a front rudder (not a good one at that) and it's also used on Rutan's Defiant. Basically the only info I found was on a radio controlled airplane modellers forum, stating that for yaw stability you still need a rear rudder that is significantly larger in surface area than the front rudder (different moment arms requires more adjustment).

So my question is: has anyone more info on front rudders as used on Hotol and with the lack of rear rudder: would the Hotol configuration as displayed with a front rudder only, be stable in yaw or would flight control software need to adjust this continuously?
 
this may help
http://www.springer.com/cda/content/document/cda_downloaddocument/9783540891802-c1.pdf?SGWID=0-0-45-1064740-p173898903
 
http://www.ebay.com/itm/RUSSIAN-UR-45678-AH-225-456-HOTOL-MPIR-RESIN-AIRPLANE-SPACE-SHUTTLE-/190580890442?pt=Diecast_Vehicles&hash=item2c5f819b4a#ht_500wt_1413
 

Attachments

  • $(KGrHqIOKiIE5cLjSW6rBOflT900fQ~~60_3.jpg
    $(KGrHqIOKiIE5cLjSW6rBOflT900fQ~~60_3.jpg
    72.4 KB · Views: 135
  • $(KGrHqEOKiME5Z3TGY(3BOflT3N2ZQ~~60_3.jpg
    $(KGrHqEOKiME5Z3TGY(3BOflT3N2ZQ~~60_3.jpg
    42 KB · Views: 128
  • $(KGrHqMOKi8E55LIEod+BOflT)fgBw~~60_3.jpg
    $(KGrHqMOKi8E55LIEod+BOflT)fgBw~~60_3.jpg
    50 KB · Views: 570
  • $(KGrHqEOKpoE5,GIuugEBOflTrTlSw~~60_3.jpg
    $(KGrHqEOKpoE5,GIuugEBOflTrTlSw~~60_3.jpg
    70.9 KB · Views: 586
...Love to know if that mesh is available for download somewhere, or if the guy who gen' the mesh is being a greedy [censored] about it ;D
 
Mriya&HOTOL in WT in slightly better resolution
 

Attachments

  • Mriya-Interim HOTOL-HR.jpg
    Mriya-Interim HOTOL-HR.jpg
    159.4 KB · Views: 854
oh! nya-nya!
 

Attachments

  • HOTOL_Sticker_.JPG
    HOTOL_Sticker_.JPG
    48.2 KB · Views: 920
nice bumpersticker ;D


on SST version of HOTOL the the source make a mistake
to get from London to Sydney in 45 minute you need not mach 6, but mach 22 !


back to Hardware trouble.
One of biggest problems HOTOL had was the heavy engine in back,
if the fuel was burned, the center of gravity shift more to back until HOTOL stall (in engine and flight)
what had they proposed to counter that ?
 
another HOTOL patch
 

Attachments

  • hotol patch.JPG
    hotol patch.JPG
    44.3 KB · Views: 727
hole in the ground said:
Michel Van said:
One of biggest problems HOTOL had was the heavy engine in back,
if the fuel was burned, the center of gravity shift more to back until HOTOL stall (in engine and flight)
what had they proposed to counter that ?
Click to expand...

this

http://www.secretprojects.co.uk/forum/index.php/topic,2455.0.html
Click to expand...

The Skylon is pretty far along so probably this problem of the shifting center of gravity was solved. But is it discussed specifically in that thread?

Bob Clark
 
Skylon's engines are on the wingtips, much farther forward than the HOTOL configuration. That was done to solve the CG shift problem.
 
Hobbes said:
Skylon's engines are on the wingtips, much farther forward than the HOTOL configuration. That was done to solve the CG shift problem.
Click to expand...

Presentation from last month's AIAA Spaceplances Conference.
Roger Longstaff, Reaction Engines, Ltd., "From HOTOL to SKYLON. British Spaceplane Programs: Past, Present and Future" (PDF)
 
Yes, an interesting document with a couple of early HOTOL designs (quite ugly, by the way)
 

Attachments

  • An-225_Mria_%28broshura%29_1.jpg
    An-225_Mria_%28broshura%29_1.jpg
    302.6 KB · Views: 446
  • An-225_Mria_%28broshura%29_2.jpg
    An-225_Mria_%28broshura%29_2.jpg
    201.3 KB · Views: 144
  • An-225_Mria_%28broshura%29_3.jpg
    An-225_Mria_%28broshura%29_3.jpg
    80.7 KB · Views: 140
Just wanted to say that this book Spaceflight in the Era of Aero-Space Planes has a good account of HOTOL very early history (notably how Alan Bond met Bob Parkinson at a BIS meeting in spring 1982)

At the very beginning HOTOL was somewhat like a DC-X with air liquefaction, but the trajectories were not compatible. Bob Parkinson convinced Alan Bond to go with a winged shape.
 
...
 

Attachments

  • hotol sticker.jpg
    hotol sticker.jpg
    54.3 KB · Views: 109
Archibald said:
Just wanted to say that this book Spaceflight in the Era of Aero-Space Planes has a good account of HOTOL very early history (notably how Alan Bond met Bob Parkinson at a BIS meeting in spring 1982)

At the very beginning HOTOL was somewhat like a DC-X with air liquefaction, but the trajectories were not compatible. Bob Parkinson convinced Alan Bond to go with a winged shape.
Click to expand...

I know the HOTOL engine (Satan??) and Sabre are not the same things but I asked a while back about a Sabre type engine for VTOVL craft and got this answer.

No, the thrust/weight of Sabre is unsuitable for vertical takeoff Cheers Richard Varvill
 
How is the SABRE engine any different than any other LACE engine? ???
 
The subtile difference is that it bring air close from liquefaction, but not there.
The other difference is that HOTOL liquefied air by bleeding liquid hydrogen that once in a gaseous state was lost. Skylon by contrast uses an "indirect" helium loop.
Liquid hydrogen cool the helium that cool the air.
 

Similar threads

Back
Top Bottom