Scissor Wing 2X (old school 1980) [Dynasoar Rocketry]

[Crawf56]

Time to put a little paint on the fuselage. Not a lot; just light coat.

Using Rustoleum paint. This paint can damage the foam, so I am avoiding anything but a little overspray.

 

[Crawf56]

Letting it dry. Note my 1/4 scale Sopwith Camel WW1 fighter in the background-right.

 

[burkefj]

Wait you painted it before you install the forward wing hold down?

 

[Crawf56]

Wait you painted it before you install the forward wing hold down?

Yes, but not a smart move on my part.

Will have to do a little light sanding before I install the forward wing hold-down.

 

[Crawf56]

Painting the wing and elevator undersides fluorescent yellow. Brushed on.

 

[Crawf56]

I am using Testors Fluorescent Yellow enamel paint (from my local Hobby Lobby),

 

[Crawf56]

Servos installed, with control rods/wires. I still need to add a guide about halfway between the servo and elevon to keep the wire from flexing too much.

 

[Crawf56]

By the way, I got 'build fever', and worked on the servo installation when I was really tired. So, the servo on the right side is about 1/4" higher than it should be.

What is particularly sad is that the servo locations were marked by Dynasoar, and I still got it wrong. However, I think the model will still perform all right.

Sometimes, you just need to go to bed.

 

[Crawf56]

I still need to add the front wing guide, and the release servo.

Here is the receiver, and showing the battery connection.

 

[Crawf56]

Wing tip guide. to hold it during rocket launch.

 

[Crawf56]

Putting a tube (1/8" launch lug) in the wing tip to hold position during rocket launch.

 

[Crawf56]

I think the wing tip lug will hold. I debated adding some thin material between the lug and the graphite rod (black). At least if the lug fails, the wing will open.

 

[burkefj]

What are you using the lug for you aren't using the pop pod and the release mechanism releases at the pivot disk? The forward stop is just to keep the wing from getting under the wing during boost and trying to fold it during launch?

 

[Crawf56]

What are you using the lug for you aren't using the pop pod and the release mechanism releases at the pivot disk? The forward stop is just to keep the wing from getting under the wing during boost and trying to fold it during launch?

I am not using a release mechanism at the pivot disk.

I intend to use a servo near the forward stop to release the wing rotation.

 

[Crawf56]

Test of my swing wing.

 

[Crawf56]

Looking at the forward servo, that releases the Swing Wing.

 

[Crawf56]

This is not how I meant to set up the forward swing wing servo, but it appears to work.

 

[burkefj]

Looks like it works! I'm curious what your all up weight is going to wind up being once ballasted. Have you figured out if the CP with the wing folded is much different than with the wing opened?

 

[Crawf56]

Launched my 2X Scissor Wing this past weekend, and it did not go well.

Lift off was great.....

 

[Crawf56]

Apogee..... no response.

 

[Crawf56]

Still no response......

 

[Crawf56]

Lawn dart. What happened?

I forgot to put down some tape/velcro to secure the receiver. When I recovered the model, the battery was in the tip of the nose, not connected.

As bad as it is, it's not that bad. Time to repair and rethink.

 

[Crawf56]

By the way, my Zephyr HPR (from Apogee) flew great!

 

[Cape Byron]

Lawn dart.

On the upside, that's a well documented lawn dart.

 

[T-Rex]

I was waiting for "forgot to turn the receiver on." But not securing things has the same effect.
Sad to see. You did a great job building this.
I built an original in middle school (74-75ish) that never flew (except off the roof of the back porch for glide tests) I have one of the reissue here somewhere that I will be building much to the chagrin of the Female Overlord.

 

[burkefj]

Step 1 is it plugged in?
Step 2 is it still plugged in

I even included velcro in the kit

 

[Crawf56]

Step 1 is it plugged in?
Step 2 is it still plugged in

I even included velcro in the kit

Step 1 - Yes, battery was plugged in on launch pad: I tested it.

Step 2 - No ....... Battery was no longer plugged in to the receiver. Battery in nose cone.

And the mistake I made was not securing the receiver. There was no velcro on the receiver to hold location on the rocket. I did have velcro in the nose cone to hold the battery.

I am guessing the receiver disconnected at launch.