A demanding project for the platform in delivering maximum efficiency, and after some lamination schedule and power setup optimizations the Raptor E1 by RaptorUAS delivered the first ever hydrogen pellet powered drone flight.
I landed at Oban years ago,lovely airfield to be testing at. But in winter!!!! Is it still porta cabins for ATC? Former RAF Connel. Was the test better served in the cold or is it just the way things worked out.
@Gary it is a bit more civilised now, ATC is fully heated :)
@matucha123 we fly under 7kg and under 200W for cruise more than 50% of weight was the hydrogen system
It just happened to be cold, it wasn't a requirement
Here is the take off:
This is indeed great. To do not have liquid/gas fuel is always very convenient as it was proven with LiPo batteries. As Sam I would like to read more technical details, the info in the link is not precise and confusing sometimes.
Btw, a basic bungee / catapult for the next take off please :P.
You will find some more info on Cella's website: http://cellaenergy.com/engineering/ and http://cellaenergy.com/our-materials/
Looks like great technology, but is proprietary unfortunately. So no detailed info available and no way to spread the technology into the DIY community. Let's wait for an "open source" version....
@Hugues If a gas hydrogen setup with a fuel cell would be of interest for the DIY community we could probably help with an open hardware setup. It wouldn't be a garage build as you need laser engraving to make the membrane stacks and deposit the platinum. Which then of course takes the project to the question of how would you raise funds to setup manufacturing for the fuel cell.
However we could help
Awesome project, very similar to my doctorate I am currently writing up. More details below:
This is an awesome project, I can't wait for these things to become commercially available.
Do you have any more information on the fuel cells being used? The Cella website leaves this part of the equation up in question quite a bit. They do link to Arcola as a "Fuel Cell" partner:
But the small-sized "developer kits" that company sells don't produce very much power. I would love to hear how 200W continuous was generated from a 1-4kg fuel cell. Also, is that the upper limits (in terms of W/kg) of the fuel cells themselves or the pellets?
James, the Aeropaks are impressive by Horizon (Arcola have close links). Slowly approaching something sensible for our hobby in terms of power density. Although there arent many applications for us where long endurance and low power is desired.
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