Differences

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

--- projects:have [2008/08/29 21:00] – adding title joshatkins
+++ projects:have [2009/03/10 19:32] (current) – update joshatkins
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-====== 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:
-===== Reality (for now...) =====
-  * **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 <del>320x240</del> 160x120) from the edge of space. First HAVE landing of high altitude vehicle at launch site.
-==== The dream ====
-  * **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]]