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Old Dec 13, 2012, 07:04 AM
ApexAero is offline
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Aka: Tom Jenkins
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Something for Lee!

Last edited by ApexAero; Dec 13, 2012 at 07:33 AM.
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Old Dec 13, 2012, 08:06 AM
Knife Liddle is online now
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Lee Liddle
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Oh yeah! Where's the buy button?
Old Dec 13, 2012, 09:10 AM
ApexAero is offline
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Aka: Tom Jenkins
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Lee its By as in beep beep an a Acme Rocket pac!
Old Dec 13, 2012, 09:53 AM
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Lee Liddle
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It's rocket powered? So I just need to find a 70mm rocket.
Old Dec 13, 2012, 12:09 PM
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Carbon fiber is our friend
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One of the guys who makes deltas like this said that they had EDF powered them before, but mostly they are turbine and pulse jet powered. It's pretty big for a single 70mm fan though. They put P120's and even 160's on them.

Look up Virus or Inferno turbine delta. They are crazy fast!
Last edited by Steve C; Dec 13, 2012 at 12:23 PM.
Old Dec 13, 2012, 12:32 PM
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Lee Liddle
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Quote:
Originally Posted by Steve C View Post
One of the guys who makes deltas like this said that they had EDF powered them before, but mostly they are turbine and pulse jet powered. It's pretty big for a single 70mm fan though. They put P120's and even 160's on them.

Look up Virus or Inferno turbine delta. They are crazy fast!
Yeah I saw a video of one doing about 350mph I think. The title was "Fastest RCJet" . That can't be accurate though, because it's a flying wing.Right?
Old Dec 13, 2012, 12:45 PM
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Carbon fiber is our friend
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Yeah, I was told deltas are dumb too. They said don't waste your time on them for a speed model. I'm not that smart though, so I did it anyway.
https://static.rcgroups.net/forums/a...2012%20013.jpg

I'm going to alter one of these for EDF. I've already started hacking one apart to see how it will work out.
Old Dec 13, 2012, 12:48 PM
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3DHOG
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Steve that thing looks wicked
Old Dec 13, 2012, 01:39 PM
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Lee Liddle
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Oh yeah! That carbon beast is wicked!! You should leave some of the carbon showing as trim color, just for the psyc out effect. Speed freaks always bow down to CF.
Old Dec 13, 2012, 06:22 PM
MustangAce17 is offline
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3d and EDF, some scale
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Stringray Mk. II

something i'm working on,possible entry for the twin category if it's included

Lee, it's the fans from the Falcon 25
Old Dec 13, 2012, 08:01 PM
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Steve, you got any idea what airfoil is being used on that delta? it's very cool. I hope you can pull off an EDF conversion and make a run with it.

Rich
Old Dec 14, 2012, 01:07 AM
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Thanks guys It's something I really should be spending more time on, but there are so many projects around here I just haven't had the time. The design does fly very well and it's been pretty fast on very modest power.

Rich, the airfoil is just something I made up after consulting a good friend about the subject. He pointed me towards some reading about NACA studies and told me the Space Shuttle was a good shape, minus the dump truck in the middle . It is not reflexed and flies in trim unless I have the battery a little forward.
Old Dec 14, 2012, 01:11 AM
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So what kind of airfoil does it work out to in the blended part of the body?
Just guesstimating that area is around 24" long. Even an 8% airfoil would put the thickness at almost 2" thick.
Or is the airfoil just really stretched out in this area, giving it a thinner cross-section?

Gorgeous design.
Old Dec 14, 2012, 02:08 AM
demondriver is offline
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Did anyone clarify if this 70mm can or cant have rocket assist or be solely an edf, I Sorry about the stupid question guys
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Latest blog entry: RC Slimer from Ghostbusters!
Old Dec 14, 2012, 02:16 AM
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LOL, I like your thinking though Chris.


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