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jflaxman — Hellhound

Published: 2014-02-18 15:24:51 +0000 UTC; Views: 8909; Favourites: 179; Downloads: 125
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Description Racing may seem frivolous in a world where fuel is scarce, but on the plains of Desiccation it is taken very seriously. This former Federation territory has fallen under Coalition control and its new masters have commandeered its more advanced technology. Races are not only tolerated but encouraged to distract the people and give the bravest and most resourceful a less destructive outlet for their passions than rebellion.

The races are held on the dry lake beds that give the territory its name. Categories are vague at best, given the chimerical constructs spawned in Desiccation scrapyards. The pulsejet-powered Hellhounds are among the most remarkable; their engines have no moving parts and can run on almost any fuel. Races between them are thrilling and dangerous for drivers and spectators alike, and the high emotions they inspire are less those of a defeated group than one content to bide its time.

Design Features:

- The Hellhound’s valveless pulsejet consists of a combustion chamber, inlet tube and exhaust tube/resonator. When fuel is introduced and lit a self-sustaining cycle of fast controlled explosions begins. As it contains no moving parts the engine is very easy to build, needs very little maintenance, and weighs less than powerplants containing turbines and compressors. Drawbacks include high fuel consumption and a short endurance; given the heat, noise and vibration caused by larger pulsejet engines this could be seen as a mercy.

- Pulsejets can use many fuels; besides the flammable liquids and gases used in other engines they could also theoretically run on coal dust or gunpowder. Normal jet fuel is ideal but subject to extreme restrictions; hydrogen is more easily sourced but harder to handle safely. For routine training most teams use more common but less volatile fuels like butane, propane, kerosene, biofuels or alcohol.

- Hellhounds accelerate slowly but can reach impressive speeds, and the hard, flat lake beds used for racing function much like sealed roads. Their jet engines are slightly tilted to increase ground pressure so no airfoils are necessary. While many older racing cars were open-topped for faster exits, Hellhounds have closed cockpits to shield drivers from debris and provide some insulation from their engines’ heat and noise. The best are sourced from the obsolete aircraft that litter Federation scrapyards; as an added benefit some still have ejector seats.

- Races tend to be short but eventful, as pulsejets burn a lot of fuel and place considerable strain on Hellhounds and their operators. Riding an opponent’s slipstream, or overtaking generally, tends to be more dangerous owing to the jet exhaust, and some drivers use unorthodox tactics or unclear rules to gain the edge. Hellhounds that complete a race often show signs of fatigue, though overhauls are easy due to their simple construction.
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Comments: 25

NickMaster64 [2019-02-16 17:48:39 +0000 UTC]

half of the car is one big rocket engine i bet it goes really fast :3

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RhodesianPoet [2016-08-22 03:28:14 +0000 UTC]

Unique work.

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ZachPientaCREATIONS [2016-03-24 09:03:46 +0000 UTC]

LOL reminds me of the rocket they steal in the movie rat race  nice pic tho!

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bear48 [2015-07-31 02:25:40 +0000 UTC]

sweet job

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ZephyrTheFox24 [2015-06-06 05:17:44 +0000 UTC]

Very 80s style theme in the picture

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bear48 [2015-04-29 00:37:46 +0000 UTC]

sweet job

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kittenwylde [2014-11-24 01:42:32 +0000 UTC]

I want to drive that thing.

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daStig177 [2014-10-07 00:22:07 +0000 UTC]

Mind if I use this idea to make an artwork of my own?

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jflaxman In reply to daStig177 [2014-10-07 01:46:37 +0000 UTC]

Go for it! I've posted a couple of links to real pulsejet vehicles below (check my replies to FollowinTheBlackBird) in case you haven't seen them yet. The engineering's pretty simple, and a bit of online research might give you further inspiration.

I'm looking forward to where this leads!

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daStig177 In reply to jflaxman [2014-10-07 03:37:22 +0000 UTC]

Thanks!  I'll get back to you once I start getting somewhere!

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Steambigbear [2014-07-20 11:56:39 +0000 UTC]

Cool.

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LordOmegaZ [2014-06-10 17:18:09 +0000 UTC]

so its like a scramjet? OWO

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FollowinTheBlackBird [2014-02-20 21:16:45 +0000 UTC]

Flagged as Spam

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jflaxman In reply to FollowinTheBlackBird [2014-02-22 17:35:11 +0000 UTC]

It might be easier than you'd think. I based this on the Maddox Lakester, a real homebuilt vehicle. Some footage if you're interested: www.youtube.com/watch?v=-bCPOL…

For a lower budget model: www.youtube.com/watch?v=bKHz7w…

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FollowinTheBlackBird In reply to jflaxman [2014-02-24 04:59:06 +0000 UTC]

Flagged as Spam

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jflaxman In reply to FollowinTheBlackBird [2014-02-24 13:54:48 +0000 UTC]

This is thrilling news! I have loads of respect (and some envy) for anyone with the time and space to pursue this sort of hands-on project.

You might be able to get small pre-made pulsejets from some sources. A custom build shouldn't be too hard if you've got the materials. Wikipedia covers the science in terms anyone can grasp, but if you're going to put it into practice I'd suggest using blueprints of a proven design as a guide.

I haven't looked far into it, but there are plenty of pulsejet enthusiasts you should be able to contact online. If your brother can restore a tractor he'll have no problem with a pulsejet. It mostly just comes down to getting the proportions right.

Good luck with this project, and feel free to send links!

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hunterN05 [2014-02-19 02:56:07 +0000 UTC]

Whoo this looks awesome!


Nice work on this man, I approve.


This looks freaking fast! I am loving dat cockpit, (why do they call it that? XD) and the front paint job, that is awesome!


I wonder how deadly the crashes are


Good work man, I love it!

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jflaxman In reply to hunterN05 [2014-02-20 17:20:40 +0000 UTC]

Concept aside, the custom paint job's my favourite part of this piece. I based the Hellhound on the Maddox Lakester, a real (but not road legal) vehicle. I've just scaled it up a bit and given it a jet-style front.

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hunterN05 In reply to jflaxman [2014-02-20 17:39:01 +0000 UTC]

It is an awesome paint job Awesome work on it guy!

Wow, real? Damn.

AWESOME!

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MightyBOBcnc [2014-02-19 01:16:45 +0000 UTC]

Ooh, love the description on this.

Unfortunately I'm not getting any sense of speed in this one for something that should be going so fast. 

It was irking me so I took the liberty of doing a bit of manip with some selective motion blur (mostly towards the back), smudging (those two bolts on the wheel to indicate rotational motion, and the wheels in general), sup3rawes0me sp33d lines (BECAUSE SP33D LINES), and addition of some extra dust.

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jflaxman In reply to MightyBOBcnc [2014-02-20 17:05:13 +0000 UTC]

Thanks for the feedback! In this series I've been trying to find a good balance between concept art and action scenes. Your reworked version is much better on the second count - there's a real sense of speed.

I'm tempted to rework this piece, though you've done such a good job I might post yours instead (assuming it's OK with you). You'll be fully credited.

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MightyBOBcnc In reply to jflaxman [2014-02-23 12:00:53 +0000 UTC]

If you'd like to then feel free to repost it.

p.s. the cockpit paint job is siiick.

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Phaedeaux [2014-02-18 20:21:18 +0000 UTC]

For anyone who thinks this is pure fantasy, valveless pulsejets exist.  You can find some on YouTube, and there are web sites devoted to them.

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jflaxman In reply to Phaedeaux [2014-02-20 17:15:49 +0000 UTC]

Thank you! I'm a fan of hard sci fi and like real (if exotic) tech. This vehicle's based on the Maddox Lakester. I've just scaled it up a bit, added a sleeker jet-styled nose and cab, and lengthened the chassis. I've used one large inlet pipe instead of two smaller ones, but I've tried to keep the proportions right despite perspective and foreshortening. This would be much easier if I used a 3D program!

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James-Dark-Blue-Wolf [2014-02-18 15:28:00 +0000 UTC]

Whoa badass ride!

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LesGoo887 [2014-02-18 15:25:14 +0000 UTC]

wow. that's cool.

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jflaxman In reply to LesGoo887 [2014-02-18 15:29:10 +0000 UTC]

Thanks!

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