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Feb 03, 2011, 11:32 PM
Registered User
Discussion

hydrogen fuel for RC airplanes


Hi, any one know if is possible use hydrogen fuel for RC airplanes ?
horizonfuelcell released this products for rc cars: http://www.horizonfuelcell.com/store/hcell.htm
H-CELL 2.0 hydrogen fuel cell power kit for hobby-grade RC racing........ (1 min 5 sec)

For example, for rc cars, it can work 1 hour over 50 mp/h
It would be great for UAV, somebody can explain how it works ? If it will work ?

Thanks
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Feb 03, 2011, 11:41 PM
Fly FPV, sleep; repeat
twinturbostang's Avatar
That's cool! How much does the power system weigh though? I think that would be a limiting factor for airborne vehicles.
Feb 03, 2011, 11:50 PM
Registered User
I think that really have future.
look these link that i found researching more about these products:

AEROPAK new fuel cell power pack for mini-UAV (3 min 22 sec)

http://www.hes.sg/products.html#
Feb 04, 2011, 01:54 AM
Registered User
That sounds like a neat idea.... I think I saw little DIY hydrogen fuel cell kits with some retrofitted motors on a website a while back..

As a side note, it's great and all until you crash it when it has any amount of hydrogen stored on board and it ignites :P Then you're picking up alot of pieces over a large area
Feb 04, 2011, 05:19 AM
Registered User
here is a hydrogen powered rc helicopter

http://www.zimbio.com/Hydrogen+Energ...pter+Completes

Video:
http://www.utrc.utc.com/web_assets/v...=272&width=478
Feb 04, 2011, 05:37 AM
OSUFPV - KF7VFT
200W/400g is 3.33 times more energy dense than my 4000mAh 14.8v 4S1P 20C RC lipo. Wow.
Feb 04, 2011, 06:02 AM
Registered User
the question is now how many amps can you pull out of the fuel cell. 200w @ 14.8V is only 13.5A your lipo can handle 80A.
Feb 04, 2011, 10:03 AM
JettPilot's Avatar
Quote:
Originally Posted by mrbrt
That sounds like a neat idea.... I think I saw little DIY hydrogen fuel cell kits with some retrofitted motors on a website a while back..

As a side note, it's great and all until you crash it when it has any amount of hydrogen stored on board and it ignites :P Then you're picking up alot of pieces over a large area
Not true. There is no evidence that this thing is going to blow up... It may catch fire, just as a Lipo, or Glow, or gas might.

This idea that hydrogen is going to result in an explostion is just BS. If we had been using electric for the last 100 years, everyone would be all paranoid and worried about how carrying around Gasoline in a car or an airplane would be far to dangerous This kind of disinformaiton and paranoia is just a disservice to us all.

This is a really neat device, with time, it will get much smaller, with much better power output. The very first batteries were not practical in an airplane either, look where we are now. People should not be short sighted, this technology has the potential to change everything

Mike
Feb 04, 2011, 10:25 AM
Just dog tired.
Wearyman's Avatar
Quote:
Originally Posted by felipesalomao
I think that really have future.
look these link that i found researching more about these products:

http://www.youtube.com/watch?v=l8Y2ovU3uVg
http://www.hes.sg/products.html#
Cool and all, but the pack is going to have to be an eighth of the size of the one pictured in the video if it's going to work for us here. That's still one darn big thing.
Feb 04, 2011, 12:09 PM
Future-proof EVERYTHING
DarkHeli's Avatar
For $600 I can design my own x3. Still a very cool idea that needs to be implemented....Everywhere!!!
Feb 04, 2011, 12:10 PM
Registered User
AndrésMtnez's Avatar
Really interesting, but it still need some slim down to be practical for airplanes

Quote:
Originally Posted by Blueshy
200W/400g is 3.33 times more energy dense than my 4000mAh 14.8v 4S1P 20C RC lipo. Wow.
Actually your battery can deliver 4 x 20 x 14,8 = 1184W

So for similar weight your battery can deliver almost x6 the power of the H-cell, and your battery is far from being the most powerful lipo today

But as Mike said, these are the first steps of this technology, let it evolve some time
Feb 04, 2011, 02:33 PM
Registered User
i think that its not correct, look hydrogen performance:
Quote:
Originally Posted by AndrésMtnez
Really interesting, but it still need some slim down to be practical for airplanes



Actually your battery can deliver 4 x 20 x 14,8 = 1184W

So for similar weight your battery can deliver almost x6 the power of the H-cell, and your battery is far from being the most powerful lipo today

But as Mike said, these are the first steps of this technology, let it evolve some time
Feb 05, 2011, 05:31 AM
Registered User
AndrésMtnez's Avatar
That graph is about endurance, not about the max power it can deliver, wich is its limiting factor Lipos had the same problem when they arrived, and now they can take more power than NiCd (45/90C!!!)

Quote:
The AEROPAKTM combines Horizon's aerospace grade fuel cell system with a proprietary chemical hydride fuel based hydrogen generator system. Effectively increasing the endurance by 300% to 400% over advanced lithium batteries currently in use opens new mission capabilities not previously possible for smaller UAS.
About power, 400 W/kg is not bad, actually it´s a value we could already use for airplanes, but it´s still far compared with the power a lipo can deliver. As they say, for UAVS where endurance is more important than total power they probably are a very good option, but for traditional RC/FPV flying they still need a little bit more punch.

But that´s to be compared with our setups, wich are totally overpowered. For a more realistic setup (slower climbouts) they could be used perfectly. The main problem is the size.
Last edited by AndrésMtnez; Feb 05, 2011 at 05:44 AM.
Feb 05, 2011, 05:59 AM
Oopss. Oh well.
borneobear's Avatar
Been discussed before:

https://www.rcgroups.com/forums/show....php?t=1372043

But the potential is so huge, I'm sure this topic will pop up again and again and again....



BB
Feb 05, 2011, 09:42 AM
Registered User
Zen09's Avatar
Quote:
Originally Posted by Blueshy
200W/400g is 3.33 times more energy dense than my 4000mAh 14.8v 4S1P 20C RC lipo. Wow.
It's not 200W, it's 200Wh.
I've seen many people omitting the "h" because they don't understand what this means and think it's useless to mention it.
Wh is capacity, W is power and h is time.
With 1Wh you can theoretically deliver 1000000000W but only for a very short time.


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