Differences

This shows you the differences between two versions of the page.

--- projects:have [2008/08/29 20:58] – 105k ft -> 100k ft joshatkins
+++ projects:have [2009/03/10 19:32] (current) – update joshatkins
@@ Line 1: / Line 1: @@
-====== High Altitude Vehicle Experimentation programme (HAVE) ======
+====== High Altitude Vehicle Experimentation (HAVE) ======
-**HAVE** is an attempt at creating a cheap, compact, durable, and reusable payload for many high altitude vehicles including balloons, rockets, and gliders.
+  * **HAVE-1:** Balloon launch to 30 km.
-The ultimate aim of the programme is to have a solar-rocket-powered high altitude rocketplane that can take small payloads to ~30 km (~100k ft) and back controlled completely autonomously by an on-board flight computer; the entire flight - ascent, hover-stay in near space, and descent, will all be controlled by an auto-pilot. Ground-to-air comms will allow a few important commands such as parachute open (able to be performed manually in the event of coming too close to a foreign object; an onboard [[http://www.sparkfun.com/commerce/product_info.php?products_id=8630|motion sensor]] //should// perform this action automatically in such a scenario, but the manual control possibility will be there for safety redundancy).
-Ultimately, I hope to convert the high altitude rocketplane into a mini sub-orbital (hypothetically, someday orbital) single-stage liquid-fuelled (LH2/LOX electrolysed by the engines on-the-fly (literally :D) - so there will never be much of the highly-flammable/explosive LH2/LOX propellant on-board at any one time - other than in the engine at the time it is being accelerated as a reaction mass).
-Anyway, that's just the dream. The short-term mission manifest is as follows:
-  * **HAVE-1:** Simple up-and-down flight to ~20-30 km. Prove [[http://www.lemosint.com/radiometrix/radiometrix_details.php?itemID=206|radio]]/SMS comms, [[http://www.sparkfun.com/commerce/product_info.php?products_id=163|GPS position & velocity data]], [[http://www.sparkfun.com/commerce/advanced_search_result.php?keywords=logomatic+v2&x=0&y=0&search_section=products|SD logging capability]]. Proof of concept of use of solar panels as sole power source, proof of concept of durable and reusable ultra-small near spacecraft.
-  * **HAVE-2:** Glider (deadstick lander) concept demonstrator flight. First use of ground-to-air comms to allow for manual parachute opening. First use of broadcasting live (i.e. not SSTV) video (probably 320x480) from the edge of space. First HAVE landing of high altitude vehicle at launch site.
-  * **HAVE-3:** First powered (high altitude rocketplane) <del>concept</del> technology demonstrator flight. Proof of concept of water-fuelled LH2/LOX-propelled rocket engine. Up and down to 30 km, powered <del>all the way</del> - just gain enough momentum and then glide (descent) or exploit inertia and aerodynamic lift (ascent).
-  * **HAVE-4:** First spaceflight (sub-orbital) (single engine, single stage). Up and down to 200 km. Re-enter with non-ablative, reusable heatshield (fire retros to slow down before entry??).
-  * **HAVE-5:** First orbital flight. 100 kg payload up to ~350 km circular low Earth orbit. 1 day in orbit, then re-enter, descent, and land. Pave the way for more awesomeness. >1 engine provides far faster acceleration, more thrust, and best of all, engine out capability.
-===== Further information =====
-  * [[http://aerospace.snikta.co.uk/have/|HAVE at Snikta Aerospace]]
-  * [[http://aerospace.snikta.co.uk/calc/|Aerospace Calculator]]