Well I haven't got around to doing a light mod yet. Not even sure if I have the skills to do that one. But, I had no choice about doing this tail mod. The lightweight styrofoam tail of my Dragonfly finally succomb to the abuse and manhandling I gave it. I had to remove it and fabricate a new tail. I used foam for the body of the tail and clear plastic for the rear wing. The foam is painted with a metallic blue.
First photo is the new tailpiece, second photo is the old styrofoam tailpiece.
Update: That foam tail piece is rather heavy. It works well to slow it down and make it more flyable indoors but outdoors it keeps it from gaining much altitude and eventually just pulls it down.
So I now have two swappable tails. The heavier foam one for indoors. And a new, slender styrofoam one for outdoor flight (see photo).
After painting, the styrofoam piece weighs 0.236 grams while the largers foam piece weights 2.044 grams.
This is the small, lightweight tail for outside flying:
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Moderator
United StatesA wielded a wee bit of Moderator mojo and resized the pictures in your post.
Anybody can edit their own posts. Once in edit mode, you can click on a picture and drag the corners to resize them as needed.
ScottE -- Member (always) & Moderator (when needed)
Member
Melbourne, AustraliaWhy the heavier one for indoors? I would have thought the lighter tail would be more prone to wind sheer.
Member
Jacksonville, United StatesHow much weight can the dragonfly hold and still be incontrol?
GWJax, To Hack and make mods on robots is a life style and comes natural and not by choice. If a robot has a screw to open it then it must be opened!
Member
Jacksonville, United StatesOh by the way Nice job on the tails! GWJax
GWJax, To Hack and make mods on robots is a life style and comes natural and not by choice. If a robot has a screw to open it then it must be opened!
i noticed the mod to the controller antenna, is that to add range? does it work?? or did you just break the original antenna?
put enuf motor on a cinderblock and it WILL FLY!!
Outpatient said: With the small, light tail it's just too darn fast to fly indoors.
I found a similar hack on RC groups - the first tail mod made it stabler to fly indoors, pic here :
http://www.rcgroups.com/forums/attachment.php?attachmentid=1183007
But the second hack was a triangular design angled at 30 deg that made it a better flier outdoors but a poorer one inside :
Live to ride... and fly!
Join Date: Mar 2002 Location: Forney, TX Posts: 12,586 Quote:
Originally Posted by mlbco I added a smallDepron (1mm) tail to my Dragonfly and it flies much better indoors. The pitch oscillations are much better damped and overall it is more stable.
Steve
I tried flying mine outside this morning (with ribbon) and could not get it to stay up more than a few seconds, the pitch oscillation was back with a veangance! This evening when I got home it was really calm out, so I rigged up a horizontal stab similar to yours. Basically I just quickly cut a triangle out of card stock, cut a slot in it to go around the prop and taped it onto the tail. I also removed the ribbon. I bent the end of the card stock down about 30 degrees and it works fantastic!! The pitchiness was completely gone at anything above half throttle and as a bonus it climbs MUCH better than before. It climbs out quickly now, so fast in fact that I was having to drop to less than half throttle to keep it from getting away. When dropping below half throttle, it does oscillate a bit, but not as bad as before. It also seems to dampen the turning, it doesn't react as harshly to turn inputs as it did before. I tried flying it inside the house and it's flying too fast, but for outdoor flight this mod is a definite must! It would seem that the stock tail is angled upward too steeply and this mod compensates for that.
Triangular (outdoor) tail template here :
http://www.rcgroups.com/forums/attachment.php?attachmentid=1192340
original message here :
http://www.rcgroups.com/forums/showthread.php?t=639277&page=7
iflyrc1012 said: i noticed the mod to the controller antenna, is that to add range? does it work?? or did you just break the original antenna?
That was just an experiment. I read a post in another forum about how the antenna should be a specific length for the frequency and if it was not that length your range would be reduced. The guy said the antenna for 27mhz should be like 2 feet 2 inches. So I just soldered on some wire to make my antenna that length. However I'm not surprised that it didn't seem to do much. I didn't think just tacking wire onto my antenna would work. I probably would need an intact antenna. I don't know about this stuff so it's all greek to me.
Here a link to that post:
outpatient,
i may be wrong, but i believe the guy in the post was talking about the length of the RECIEVER antenna not the transmitter. he says that he used stripped magnet wire wrapped around something to get 2 feet of wire. lol!!
put enuf motor on a cinderblock and it WILL FLY!!
iflyrc1012 said: outpatient, i may be wrong, but i believe the guy in the post was talking about the length of the RECIEVER antenna not the transmitter. he says that he used stripped magnet wire wrapped around something to get 2 feet of wire. lol!!Yeah, he used wire supported by a plastic tube so it would stand up like the antenna should. Yes he's talking about the controller antenna.
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Ooops. Sorry about blowing out the frame with huge photos.
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