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Finished the 30 cm proto a moment ago, got to change the power wire and connector to a different one and soldered the old power cord for motor out on the brick. I still haven't decided what battery I'll be running this with. Test glided this ballasted to 20 grams, looks promising. Might do the maiden flight tomorrow at local tiny whooping session. Or on Saturday.
Has anyone of the readers started to build any? |
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Last edited by Keppis; Feb 20, 2019 at 03:10 PM.
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Maidened the 30
Couldn't wait till Saturday to get it tested out so I went again with the local whoopers to get indoors to stable conditions Forgot to check the directions of the control surfaces on the first toss so the ailerons were reversed and you can easily guess how that went I guess I was too excited. Well, edit the mixers and a second try which was a success! Thanks to Jarkko for filming and chucking it for me.
More testing on Saturday then, other props and such. Final weight came just under the 20 grams, maybe a bit smaller batteries would make it even lighter. Gotta whip something out from the videos I got today (GoPro, some DVRs). |
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Hello guys, one my friend just told me about this project, i did’t read all the posts yet but already love it!
I think that the project that I’m working on right now would perfectly match the requirement of this model! I’m working on a dogfight system for FPV combats! Take a look at this thread! https://www.rcgroups.com/forums/show...fight-Lasertag I’m almost finished with the design process... and soon I’ll start the production of the first 20 prototypes! Here is an “old” video I did very quickly just to give an Idea...
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The board should weight less than 10g I could consider the possibility to make smaller, lighter and less powerful system for small models so it should be <5g.
Talking about the closet of control I agree with you about control surfaces, but if the model ca barely glide, if you turn off the motor for just a few seconds do you still think it would be a big problem? During one of the first test I did, I was flying alone a wing and I jotted myself at about 5/7 meters above my head, I could land without any kind of damage... |
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Hello ioteo,
You have a very interesting project. The small variants of the AD/HD are very lively models and I wonder if any real aiming would be possible with them. However, the bigger variants, say 60-80cm, might be good candidates for your project and those should be able to carry extra weight of the gear easily. |
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accidental double
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30 cm version flying indoors on a whoop course. More flying coming up in a few days since it's Saturday indoors tonight! |
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30 cm starts to be quite critical both aerodynamically and symmetry vice. Hard to get it fly straight, even a small dent on rudder or rudder being a bit misaligned to the fuselage makes it bank and unwilling to turn to the other way. Though it flies, it's a success, but gotta try a bit bigger motor on it next time.
Also it seems that my brick does not have a very great range, tried to do the corridor run, got to the stairs when the control signal cut out and I became a passenger flying towards a window Maybe I'll include that clip on the video when I get to it. I have another brick coming in the mail, looks like I'll be adding a 40-sized one to my fleet too, or maybe a 35 sized. |
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Last edited by Keppis; Feb 24, 2019 at 07:47 AM.
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Keppis,
Thanks for the insights on sizing a AD/HD. I'm working on a 36cm one out of food tray foam. When I printed the plan to the largest scaling on my 8.5 x 11 inch paper the fuselage profile resulted in a 18cm wing cord! Doubling this gets the wingspan, of course Gear planned for my build is a 1-cell Spektrum brick, 8.5mm coreless motor, GWS2508 propeller direct drive in the tail. I'm tempted to move the motor to the nose (making it a tractor) and adding landing gear, but may put these on another build. The AD/HD design has the wing shape of the Diamond delta and the wing reflex like the GWS Ladybug. A cool combination! |
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Last edited by CorvetteC5; Feb 27, 2019 at 06:46 AM.
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Can't wait to finish this out. It'll be a couple days before I can complete it though. 30 cm version - should be around 30 grams with fpv rtf. Love the looks of it! Nice design!
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@CorvetteC5 sounds good, I was thinking of a 35 cm variant, so we'll see how it'll work out. Are you going to put a carbon reinforcement to the wing?
Yeah, it'd sure work as a tractor too, but your motor and prop wouldn't be as safe as they are in the back (and prop would get in your camera). Go for simple tricycle gear instead? 8.5 mm motor does not require a large prop. I've been thinking putting a tricycle gear to mine too and attempt some FPV Carrier landings on a table Our veteran hobbyist "Jorkku" made the 65 and 125 variants with motor in the middle, he put a fin under the fuselage too so the prop is always safe plus now he has airflow over the elevons even on much slower speeds and in high alpha. @JLeyland 30 grams sounds a bit heavy but given you'll be having plenty of power it will fly well. I'm going to try a 8.5 mm motor on my 30 sized too for the next weekend, should match the 40 cm variant better then. Your leading edge looks sharp, might get choppy characteristics, maybe you should try sand it a bit rounder and squeeze the foam denser, this and adding tape to the leading edge prevents it getting dents and cuts I'm happy to see people giving the AD/HD a try and sharing their experiences on it. One fellow is going to try a 3D printed version of the 40 |
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I'm close to completing my build. Wingspan is now 14.5 inches since I only have a 15cm ruler in metric! Wing material changed from foam to balsa wood. It was requiring 4 pieces of my foam for the wing, and not all pieces were from the same style of food containers. LOL. So I simplified and used scrap balsa of 1/16 inch thickness. I'm pleased with the look now, and will post pictures, even with the weight gain. I'm still using foam for the fuselage and fin for a nice contrast.
Curt |
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