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May 31, 2012, 08:00 AM
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robertus's Avatar
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Build Log

SA-43 Hammerhead - plans


I'm going to do a flying, I hope, a model inspired by the sci-fi TV series, "Space Above and Beyond"
It looks like this:


more photos, eg here

It will be difficult model for me because I did not plane with canards.
I have this assumption that I will start from the simplest construction and will be hampered in the direction of approach to the original.
For example, I start from the wing with no negative angle.
The front stabilizer is constant.

wingspan is 860mm
length is 780mm

Here is some photos, what I done so far.

SA-43 Hammerhead Depron RC (0 min 35 sec)


Plans are in #54 post
Decals are in #32post
Last edited by robertus; May 30, 2013 at 07:34 AM.
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May 31, 2012, 08:13 AM
Registered User
Looking forward to seeing that - was one of my favourite sci-fi series. You'll have to ado a Chiggy von Richtoffen next!

Chris
May 31, 2012, 08:39 AM
TonyS
Robertus,

A thread specifically for sharing information related to canard models --

https://www.rcgroups.com/forums/showthread.php?t=613556

TonyS
May 31, 2012, 10:14 AM
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robertus's Avatar
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Quote:
Originally Posted by crylex
You'll have to ado a Chiggy von Richtoffen next!
Of course. I have that an idea in my mind
I think it will be simpler to build than Hammerhead.

Here is my CoG calculations
The CoG is few cm in front of wing


and a little update on the progress




a little black dot is CoG point


I hope that two small stabilizers can replace one big, if not, I will add a boom suspensions for armament under the wing

Last edited by robertus; Jun 05, 2012 at 01:45 PM.
Jun 01, 2012, 04:12 AM
skumgummi dave
robertus:

Delighted to see your build of the SA-43. I have wanted to build one as well, but you have actually made some good progress. I will be watching you as you continue on this build. Thanks for sharing...

Dave-
Jun 01, 2012, 09:32 PM
"Fly, yes... Land, No"
OutcastZeroOne's Avatar
Awesome. I loved that show when it came out. Good luck with the build. Ill also be keeping an eye on this. No preasure
Jun 05, 2012, 01:28 PM
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I did mount the wing. In the fuselage is glued 3mm plywood with foam.
On the top of wing is 1mm plywood too


Fitting electronics

Unfortunately, it turned out that I have to add to the nose about 50 grams of ballast to balance it at the calculated point of gravity.

Weight for the flight of about 480g.
Wing load of about 21g/dm2
I think it's good.

I made a dart at a scale of 1:2 to the original to test how it glides

The calculated center of gravity for this little one is in the same location as the original. In front of the edge of the wing
However, that a small plane had glided well I moved the center of gravity to the rear. In the picture the green dot.

Canard and the wing is at 0 degrees. Wing is KFm3 , canard KFm2. canard is fixed, it will not move.

And what it suggests, how to balance a large one?
Last edited by robertus; Jun 05, 2012 at 02:22 PM.
Jun 05, 2012, 03:48 PM
skumgummi dave
robertus:

Your model is coming together beautifully. I hope you will be able to share plan with the group here.

Warm regards;

Dave-
Jun 05, 2012, 07:26 PM
SG Talon... Super Genius.
I would just slap a motor in the slot of that small one and fly that!!
Last edited by SGTalon; Jun 05, 2012 at 07:34 PM.
Jun 05, 2012, 09:11 PM
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looks good so far. hope it flies as well as it looks
Jun 07, 2012, 01:06 AM
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robertus's Avatar
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Gliding tests:
First, I throw with the canard on 0deg, then with a slight positive angle plus displacement SC forward, as in the calculation. Seems to me that on both setup flys same well.
Glider SA-43 (0 min 49 sec)
Last edited by robertus; Jun 07, 2012 at 02:09 AM.
Jun 07, 2012, 07:32 AM
SG Talon... Super Genius.
I am a little concerned with the little turn it was doing at that end. I had a similar problem with my Klingon Bird of Prey.

You might need some more vertical tail on that thing or it might be unstable when it is flying. Mine kept wanting to swap ends and fly backwards.

Looks decent though.
Jun 13, 2012, 03:31 PM
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Today I flew my Hammi Later in the evening the wind stopped blowing.
"Blowing to the the cold" I increased the vertical fins, between flights shortened by half, but they are still higher than I would. In the next tests I'll correct their height again.
I think that the experimentally determined CoG is closer to the CoG calculated by the program than that of the test little dart. It also requires further testing. At this time, the battery is moved forward, as a further move CoG will require adding weights.
After the first flight I can say that it is very stable, perhaps even too much, I think that's the canards which have a light stroke. Wedge angle for now I'm set to 0deg.
Still a lot of work ahead of me, but I'm happy with today's test flight
SA-43 Hammerhead RC Depron Maiden Flight (5 min 0 sec)
.
Last edited by robertus; Jun 13, 2012 at 04:26 PM.
Jun 13, 2012, 04:19 PM
"Five Easy Pieces"
Excellent!
Jun 13, 2012, 05:44 PM
Altitude is my friend...
Depronicus's Avatar
Like SGTalon, I was wondering about the short vertical stabilizers, but they seem to be plenty tall enough, considering how well it flies. There are two of them, of course.

Good to see a canard project. Nice work!


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