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New SpeedWing Dart -- Any Interest?

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Old 01-04-2006, 01:06 PM
  #1  
Acer
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Default New SpeedWing Dart -- Any Interest?

Well, I've been kitting foam models for a while now. I have just completed my first built up kit and was wondering if there would be any interest in it. It is (so far) called the SpeedWing Dart. It is a 20" wing span delta with pull-pull rudder control.

The construction is balsa with carbon fiber tube spars and carbon fiber tube leading edge. All the radio gear has its own easily accessable bay with removable cover. The battery bay cover is hinged and has cooling holes towards the back. It is an extremely strong, thin wing capable of very high speeds .

Motors used can range from the lowly Johnson 250, up to Mega 16/15/xx motors. The motor in the pictures is a MTM (JustGoFly, etc..) 300 DF outrunner.

The setup right now weighs in at 8.5 oz. and includes the following: 3 HS-55 servos, Berg Microstamp Rx, CC Phoenix 10 ESC, MTM 300 DF, and 3s 830 Tanic cells. Covering is Ultracote. This setup in my Mini SpeedWing 250 was radared at 75 m.p.h. I expect it to be about 80-85 m.p.h. in this wing, all while pulling only 6A

The kit would more than likely be laser cut (if not then CNC cut) and would include all hardware needed to complete.

Video should be up in a few days. So, anyone interested?

-- Acer
http://speedwing.net
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Old 01-04-2006, 02:45 PM
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rmenke
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Default RE: New SpeedWing Dart -- Any Interest?

Acer: Looks interesting. When you get your kit up, priced and ready go go, let us know. Also, surggest you do a 40 sized version of this.
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Old 01-05-2006, 09:52 PM
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Default RE: New SpeedWing Dart -- Any Interest?

Well, I have most parts designed and coded for the production model. Here are a few pictures of what I have done so far. As you can see, the motor mounting area is designed to be very strong, so it will be able to withstand crashes better than some other balsa planes (comparitively speaking).

All parts are tabbed and slotted for easy alignment and strength. The leading edge and spars are carbon fiber tube. Also, the rudder is protected from ground strikes with a ply skeg that will blend into the body of the plane.

Anything you see that needs changing?

-- Acer
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Old 01-05-2006, 10:00 PM
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daven
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Default RE: New SpeedWing Dart -- Any Interest?

Tabs and slots, the only way to go.

Looks very nice.
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Old 01-06-2006, 08:21 PM
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Default RE: New SpeedWing Dart -- Any Interest?

i want one
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Old 01-06-2006, 09:29 PM
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Default RE: New SpeedWing Dart -- Any Interest?

How about a 40 size for a glow engine?
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Old 01-06-2006, 09:32 PM
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Default RE: New SpeedWing Dart -- Any Interest?

If this one sells well, I have plans on making a larger one... and a smaller one (10" wing span). I'm also wondering if I should make this wing work with engines, or just stick to electric for this size.

--- Acer
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Old 01-06-2006, 09:39 PM
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Default RE: New SpeedWing Dart -- Any Interest?

I would be interested in one that I could install a Jett 50 engine on.
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Old 01-06-2006, 11:47 PM
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Default RE: New SpeedWing Dart -- Any Interest?

WD wants a 40 glow version

I would buy on two but put two fins (optional) please for I have a 60LX FIRE being made[sm=bananahead.gif]
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Old 01-13-2006, 03:09 AM
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Default RE: New SpeedWing Dart -- Any Interest?

Well, the production version is almost ready. I just need to cover it, install the gear and fly it for a while. What you see in these pictures is how the production kit will look (the tail might change slightly depending on how the flight tests go).

The airframe is extremely strong, it should be able to handle some pretty rough crashes. The leading edge SF spar is secured to each rib with CF tape wrapping.

Here are a few pictures. Let me know if you see anything you think might need changing

-- Acer
http://speedwing.net
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Old 01-13-2006, 03:10 AM
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Default RE: New SpeedWing Dart -- Any Interest?

A couple more pictures. I'm thinking on using this motor in it (Mega 16/15/3) Can you say FAST!!!
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Old 01-15-2006, 03:53 PM
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Default RE: New SpeedWing Dart -- Any Interest?

Well, the production prototype is done. I will have pricing in a little while (have to cut a few kits to see how much machine time there is), but I don't expect it to be very high, somewhere around where my current kits are selling.

This one is covered in Econokote. I'm going to test fly it using the MTM 300 DF, but may stick the Mega 16/15/3 in there after a bit

Here are a few pictures of the finished build

-- Acer
http://speedwing.net
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Old 01-16-2006, 02:52 PM
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Default RE: New SpeedWing Dart -- Any Interest?

Well I just had a test flight. FLIES GREAT!!! It is VERY fast with the setup I have in it now (300DF, 4.75x4.75 prop, 3s 830 Tanic). The all up weight is only 8.3 oz. and the wing area is 197 sq. in.

This setup only pulls about 6A, yet this wing is going over 70 m.p.h. The wing goes exactly where you point it, just like a Dart When you cut the trottle it doesn't slow down either, it keeps energy very well, BUT, you can pull the nose up and it slows down nicely with abo****ely no hint of stalling. You can flair it and land extremely slowly, easily lands at your feet. Also, it is very quiet. It doesn't have the angry bee sound that pushers tend to have.

I haven't used the rudder yet (too nervous to on the maiden) but I will shortly. The funny thing about this design though is it needs no reflex in the elevons at all, so all the power of the motor turns into speed and not into drag. It is a very "slippery" airframe.

I'll be shooting a video shortly

Just for fun, I weighed out a Mega 16/15/3 and 3s2p 1500 Kokams and the all up weight was only 15.25 oz. I'd be very scared to try this setup though as watts out is close to 330 WATTS! (I got nervous on only 66 watts ) That is almost 350 watts/lb. That setup should easily go over 150 m.p.h., yet still weigh less than a pound.

The setup you are talking about (Mega 16/15/4, 2s 1550) would only weigh a little over 10 oz.

After I get used to the Dart, I'm going to try a 2s setup on the Mega 16/15/3. Motocalc says static prop pitch would be about 90 m.p.h. and static thrust of over 20 oz. (2:1 thrust to weight ) while pulling 16A.

-- Acer
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Old 01-24-2006, 03:18 AM
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Default RE: New SpeedWing Dart -- Any Interest?

Video is up!!!

Both a [link=http://speedwing.net/assets/multimedia/dart_first_flights_large.wmv]LARGE[/link] and [link=http://speedwing.net/assets/multimedia/dart_first_flights_small.wmv]SMALL[/link] version are available at about 10.5 minutes each. Fun and Fast flying the new SpeedWing Dart.

Enjoy the show.

-Rodger
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Old 02-04-2006, 01:34 AM
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Default RE: New SpeedWing Dart -- Any Interest?

We are now accepting orders for the new SpeedWing Dart. The kit includes all CNC cut parts and all hardware neccessary for completion, including the pull-pull setup for the rudder and carbon fiber pushrods. The kit is "tab and slot" construction, so it goes together very fast ( you can have the airframe ready to cover in about 2 hours).

I designed this model to be extremely strong and very crash resistant (like my foam models ), and I have "test crashed" it a number of times (some of the crashing you can see in the video above).

The SpeedWing Dart will fly very well on motor combos that produce from 70-300 watts. Here is the SpeedWing Dart page where you can order: http://speedwing.net/html/body_speedwing_dart.htm

-- Acer
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Old 02-04-2006, 01:57 AM
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Default RE: New SpeedWing Dart -- Any Interest?

Oops, here's a short crash video: http://speedwing.net/assets/multimed...ound_large.wmv
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Old 02-04-2006, 08:27 AM
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Default RE: New SpeedWing Dart -- Any Interest?

What about a glow powered version? Is it in the works?
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Old 02-04-2006, 10:08 AM
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Default RE: New SpeedWing Dart -- Any Interest?

I'm going to design a glow version in the near future (for the Norvel .074). At the moment though, I'm only going to be selling the electric version.
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Old 04-01-2006, 09:36 PM
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Default RE: New SpeedWing Dart -- Any Interest?

Acer,
Looks like you would be the one to ask. I have had several Delta and flying wings in the past and have experienced the same situation with all of them. When moving the aileron axis there is no problem. When moving the elevator stick one servo always lags the other. I have a 9CAP and was wondering if the problem is a crummy servo and they need to be hand picked out of a lot or if there is a programming feature in the transmitter for this time lag. Being a combat flier the result is not a white knuckle situation, just a nuisance. Thanks for your input. Looks like I'll be buying a DART.
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Old 04-01-2006, 10:34 PM
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Default RE: New SpeedWing Dart -- Any Interest?

fred,

I fly several deltas with a 9CA I have not seen servo lag because of the TX. I would check the servos, a quick swap would show if it is the servo or if it the airplane. slow side changes it is the servo slow side remains the same it is in the plane. Are you using any extentions in your setup? A bad connector or wire may add resistance causing a voltage drop to one servo thus making it slower.

how is the mechanical set up on your delta?

on the 9CA you can program servo lag in on the throttle channel (3) to simulate a turbines power curve- errr actually the spool up

if you have hitec digital servos and the programmer you can set servo speed and create and or match servo lag.

Flying a whiplash at 160+MPH and servo lag on one side would turn a loop into a barrel roll! [:@]

bob
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Old 04-03-2006, 10:34 AM
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Default RE: New SpeedWing Dart -- Any Interest?

I never match my servos to each other, although I do use the same brand/size servo for each elevon. What I do before installing the servo arm is center each servo and center the trims. I then place the servo arms on the servo making sure that they are exactly the same on each servo. This way you get full and equal throws on each servo.

One thing to check is if you have the same amount of throws set in your elevon mixing function in your radio. I always leave mine set to the default setting of 100%. I use the dual rates to set the actual throw amounts.

THe other thing it could be is a bad/slow servo. I have had servos go bad, but still work. If you move the sticks slowly, you will see that the bad servo moves much slower than the other one. It will also trim differently when using the trims (it won't move with the trim, only after you get past a certain trim setting).

So, all in all it is probably a bad servo.

Hope this helps.

-- Acer
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Old 04-03-2006, 10:37 AM
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Default RE: New SpeedWing Dart -- Any Interest?

I forgot to add, another thing to do is place the control horn the same distance from the leading edge of the elevon as the other one. This will ensure that you have the same amount of throw for each elevon.

-- Acer
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Old 04-07-2006, 06:01 PM
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Default RE: New SpeedWing Dart -- Any Interest?

hey acer, I love the plane. how would it perform with and axi 2208/34 in the nose? also what kind of battery/prop combo should i use?

thanks a bunch
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