RE: (Something Fast?) Delta Build Thread

RE: (Something Fast?) Delta Build Thread
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RE: (Something Fast?) Delta Build Thread - 7/16/2007 4:29:09 AM

ChuckL

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Joined: 9/24/2004
From: Alanson, MI, USA
Status: offline

Ya I missed the that view of the fuselage looks like it would work out just fine.

(in reply to Mike Connor)

Post #: 76

RE: (Something Fast?) Delta Build Thread - 7/16/2007 5:11:52 AM

Mike Connor

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From: Tulsa, OK, USA
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quote:

ORIGINAL: iron eagel

Thanks mike,
I think that with a 91 df it be way to fast for where I fly....
I bet that you could get 200+ out of that setup, even with a bigger airframe.
Just add the extension you have and a 60-70 would fit well and more than enough power. Hmm, make the center section an inch or two wider mount the engine sidewinder totally enclosed within the fuse. Pipe the exhaust and air to a rear dump bet that would honk.

Have you seen:
http://www.shredair.com/fan.html
4 lb thrust...

I have been thinking about my next project being a Screamin Demon Sr. A 25% increase in size so a 91 df with prop would fit. A actual df version would probably look neat though. What is the "4 lb of thrust..."? I am getting more then that with my Thunder Tiger.

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Mike
http://www.mikesrc.us/

(in reply to iron eagel)

Post #: 77

RE: (Something Fast?) Delta Build Thread - 7/16/2007 5:39:58 AM

Mike Connor

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Joined: 1/10/2002
From: Tulsa, OK, USA
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quote:

ORIGINAL: ChuckL

Ya I missed the that view of the fuselage looks like it would work out just fine.

If someone would spend a little time and build a full cowl for a fire engine like yours it would probably look really good and go like stink.

To all
While this project may look like a business it is really just a hobby for me. I really doubt it would ever put dinner on the table and I can see that kit manufacturing will get old in time. I thought it would be fun to sell a few kits for a plane that I think turned out really well. If for some reason the Screamin Demon became popular I would probably hand the project off to someone else in time. It is kind of neat that my creation will be international by the end of the week. I just hope that people like them.
Thanks all

Edit - I hope no one feels any pressure from me to get one is what I am trying to say.

< Message edited by Mike Connor -- 7/16/2007 6:29:03 AM >

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Mike
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Post #: 78

RE: (Something Fast?) Delta Build Thread - 7/16/2007 4:39:27 PM

iron eagel

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From: Middleboro, MA, USA
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Mike that four pounds of thrust is with an electric df unit.

I bet 25 oversize with a 90 would do better than you think, the beauty of that is you can blend the engine right into the body.
If you run a prop on that engine and can get it to spool up to the rated 20-22,000 rpm think of what an 8-10 pitch prop would give you for a top speed. Lets see 8 X 20,000 = 160,000 inches per minute....

Nice to hear your design went international, that is cool.
I have done the same thing using carbon fiber for spars, it is amazing how much strength you can get from a small amount of structure. And the beauty of it is that it distributes all of the force throughout the structure so it can take a lot of abuse.
Hey while your at it put together a kit for one of the blue states will ya, you know where we drive cahhs.

_____________________________

The Wrights never crashed, they only had hard landings. I 've had some hard landings myself. AMA EAA AOPA revver #185

(in reply to Mike Connor)

Post #: 79

RE: (Something Fast?) Delta Build Thread - 7/17/2007 4:08:00 AM

Mike Connor

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From: Tulsa, OK, USA
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quote:

ORIGINAL: iron eagel

Nice to hear your design went international, that is cool.
I have done the same thing using carbon fiber for spars, it is amazing how much strength you can get from a small amount of structure. And the beauty of it is that it distributes all of the force throughout the structure so it can take a lot of abuse.
Hey while your at it put together a kit for one of the blue states will ya, you know where we drive cahhs.

I really like the carbon fiber spars ever since I started flying Diamond Dust. Very strong and very stiff but will allow some flex when needed. You can see the spar is the only thing that survived in the crash below. There is also an epoxy based carbon fiber with half the tensile strength and way too much flex that is cheaper. I paid the extra for true carbon fiber at about $7 a kit.

Was that an order?? If so, go through my site if it is an we will get things going. Short kits ready to ship this week and full kits next week. Unless I run out.

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Mike
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Post #: 80

RE: (Something Fast?) Delta Build Thread - 7/17/2007 9:15:05 PM

iron eagel

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From: Middleboro, MA, USA
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Hi Mike,
Place an order for one of your beast....
That must have been a spectacular crash by the look of the remains.
I am torn about the power for mine, glow or a real high spinning electric, could go either way. The electric version would be more of a fun fly, and I 'd be getting the motor for it, however glow I have several engines I could try in it.

_____________________________

The Wrights never crashed, they only had hard landings. I 've had some hard landings myself. AMA EAA AOPA revver #185

(in reply to Mike Connor)

Post #: 81

RE: (Something Fast?) Delta Build Thread - 7/18/2007 12:11:40 AM

smchale

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From: Malvern, PA, USA
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Mike,
Are you redefining 'short kit'?!?

Great job on the new delta! If I didn't already have 2 whips, a dust, and a mini dust all flying i'd be on the list for a new one!
Cheers

_____________________________

Cheers, Sean McHale
www.strictlyscale.com....and Revver Brotherhood #101

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Post #: 82

RE: (Something Fast?) Delta Build Thread - 7/18/2007 12:23:55 AM

Mike Connor

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From: Tulsa, OK, USA
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quote:

ORIGINAL: iron eagel

Hi Mike,
Place an order for one of your beast....
That must have been a spectacular crash by the look of the remains.
I am torn about the power for mine, glow or a real high spinning electric, could go either way. The electric version would be more of a fun fly, and I 'd be getting the motor for it, however glow I have several engines I could try in it.

It would have been spectacular if it wasn't a good 150 yards out. The Sport Jett engine survived along with the CF spar.
If you go electric I would love to see a video. Thanks for the order

_____________________________

Mike
http://www.mikesrc.us/

(in reply to iron eagel)

Post #: 83

RE: (Something Fast?) Delta Build Thread - 7/18/2007 12:30:16 AM

Mike Connor

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From: Tulsa, OK, USA
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quote:

ORIGINAL: smchale

Mike,
Are you redefining 'short kit'?!?
Great job on the new delta! If I didn't already have 2 whips, a dust, and a mini dust all flying i'd be on the list for a new one!
Cheers

4 deltas is just about right. Looking over my shoulder I would say I have a few more then that though.

Thanks for the compliment. It will be interesting to get flight reports over the next few weeks and months.

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Mike
http://www.mikesrc.us/

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Post #: 84

RE: (Something Fast?) Delta Build Thread - 7/18/2007 2:15:54 AM

iron eagel

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From: Middleboro, MA, USA
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Mike,
I am thinking of using either an Axi or Atlas outrunners around 500-1000 watt system.
Both will spin 13X10 props direct drive, so if I use a smaller diameter high pitch prop should work well for top speed or a larger lower pitch for more 3D type of flying.
I have a guy in our club who is use to flying fast planes I will see if I can get him to do some high speed passes with it so we can get the video for you.

I am interested in seeing if there is any improvement in the performance by the more streamline shape using an electric motor.

< Message edited by iron eagel -- 7/18/2007 2:37:19 AM >

_____________________________

The Wrights never crashed, they only had hard landings. I 've had some hard landings myself. AMA EAA AOPA revver #185

(in reply to Mike Connor)

Post #: 85

RE: (Something Fast?) Delta Build Thread - 7/19/2007 1:31:28 AM

Mike Connor

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From: Tulsa, OK, USA
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13x10 sounds like a lot of prop but I guess the outrunner wont be turning that much rpm. You should be able to make the front end really clean with electric. Can't wait to see pics.

All parts are in and I have been putting together kits. ALL paid orders will be shipped tomorrow (July 19). This is a lot of work.

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Mike
http://www.mikesrc.us/

(in reply to iron eagel)

Post #: 86

RE: (Something Fast?) Delta Build Thread - 7/19/2007 3:16:08 AM

Xardas26

Posts: 42
Joined: 2/10/2006
From: Brandon, FL, USA
Status: offline

Just out of curiosity: How many people have ordered one of your demon kits or showed their interest??
I think it's awesome that you came up with something like that cuz you still can't get any Diamond Dusts from diamonddustrc.com or morrishobbies.com. The Screamin Demon is like a modded Diamond Dust and probably faster because it has less drag (engine cowl, reduced wing span), but more importantly, it has a true airfoil. The airfoil of the Dust is rhombus or diamond shaped with 4 flat sides which from a aerodynamic point of view is a nightmare, and only slightly better than a flat wing. A 6% NACA airfoil is the way to go!!!

Right now I'm debating whether I should get the kit or just the plans. I would like to build the Demon using a Styrofoam core. I'm just gonna wait and see how my styrofoam/balsa Outlaw flies before I make up my mind.

(in reply to iron eagel)

Post #: 87

RE: (Something Fast?) Delta Build Thread - 7/19/2007 3:22:30 AM

iron eagel

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Joined: 7/15/2004
From: Middleboro, MA, USA
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Mike,
I am not sure how far I can push an outrunner for rpm but both motors I am considering equal a .60 size glow in torque. They are both in the 7 oz range for weight and the ESC weighs about an ounce for one that will handle 75 amps. So my motor and speed control will be lighter than the glow setup. Now if I use 2 3 cell li-pol batteries that will give me 22.8 volts or roughly 1400 watts of go power, better than 1.75 hp. The weight of the cells should be in the 8-10 oz range, which should come out about equal to a load of glow fuel in weight, so I should not be adding that much weight to the airframe.

If I can spin a 13X10 prop with that perhaps a 12X12 might work, will be interesting trying to prop this thing. Another option is to go to a smaller diameter 3 blade while they produce less thrust they come into there own as you go to higher speeds.

Now where I have eliminated the need for a throttle servo I can use that for the optional rudder setup. All and all it should make for an interesting experiment. I am going to have to modify the main body in order to allow for a hot air exhaust but overall it should be pretty close to the stock design, save for the added rudders.

I will try and document what I do as far as mods. for the electric version and send you the info...

Regards
Paul

< Message edited by iron eagel -- 7/19/2007 3:27:59 AM >

_____________________________

The Wrights never crashed, they only had hard landings. I 've had some hard landings myself. AMA EAA AOPA revver #185

(in reply to Mike Connor)

Post #: 88