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Sep 09, 2009, 08:24 AM
ninja's fly low
Thread OP
Build Log

Hades - PC [SBC] based UAV


I'm starting Buil-Log thread for this project. I'm going to build Single Board Computer based UAV with duck, forward swept wing, bi-plane layout.
It should be highly autonomus [ Linux based with scripted events based on sensors and flight plan] equipted with advanced sensor array [more later], GPS, hi-res still camera, pan-tilt camera, pan-tilt wifi antena [long range]. Optionaly RC control, retracts, positional lights, on board 3D terrain processing, small cargo bay and various others candy
For now I'm developing CAD cutting and assembly plans. Should have 4 stroke engine [ASP FS-80AR (13,0 ccm)]. Wingspan of aprox 3000 mm. Main construction is composite for fuselage and composite-foam-wood for wing.

c&c+ideas= more than welcome cause this is my very first atempt to build RC scale plane ever

ENGINE:
Manufacteur: S.Y. Machinery
Power 1,51 HP [1,1 kW] @ 11000

WING:
Profile E205

TO implement:
https://www.rcgroups.com/forums/showthread.php?t=905915 Long Range RC Control
https://www.rcgroups.com/forums/show....php?t=1038462 RoBoard RB-100


Looking for CAD data or dimensions for engine cause can't find anny and english translation of manufacteur page is poor .
Last edited by cupsster; Sep 09, 2009 at 08:44 AM.
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Sep 09, 2009, 09:36 AM
Registered User
Quote:
Originally Posted by cupsster
I'm starting Buil-Log thread for this project. I'm going to build Single Board Computer based UAV with duck, forward swept wing, bi-plane layout.
It should be highly autonomus [ Linux based with scripted events based on sensors and flight plan] equipted with advanced sensor array [more later], GPS, hi-res still camera, pan-tilt camera, pan-tilt wifi antena [long range]. Optionaly RC control, retracts, positional lights, on board 3D terrain processing, small cargo bay and various others candy
For now I'm developing CAD cutting and assembly plans. Should have 4 stroke engine [ASP FS-80AR (13,0 ccm)]. Wingspan of aprox 3000 mm. Main construction is composite for fuselage and composite-foam-wood for wing.

c&c+ideas= more than welcome cause this is my very first atempt to build RC scale plane ever

ENGINE:
Manufacteur: S.Y. Machinery
Power 1,51 HP [1,1 kW] @ 11000

WING:
Profile E205

TO implement:
https://www.rcgroups.com/forums/showthread.php?t=905915 Long Range RC Control
https://www.rcgroups.com/forums/show....php?t=1038462 RoBoard RB-100


Looking for CAD data or dimensions for engine cause can't find anny and english translation of manufacteur page is poor .


Forward swept wing?
Sep 09, 2009, 09:41 AM
7000mw of raw power!
rich smith's Avatar
Quote:
Originally Posted by airmcn_3
Forward swept wing?
Yeah. That's what I thought. And biplane to boot. Definitely not self-stable and probably not controllable either.
Sep 09, 2009, 09:42 AM
Outta Sight
Similar to a Dara D-1 style of wing ?
Bipe, one wing swept back, one wing swept forward.
Sep 09, 2009, 10:49 AM
ninja's fly low
Thread OP
Quote:
Originally Posted by RolandS888
Similar to a Dara D-1 style of wing ?
Bipe, one wing swept back, one wing swept forward.
Quote:
Yeah. That's what I thought. And biplane to boot. Definitely not self-stable and probably not controllable either.
No both main wings swept forward... Reason?
Inflight unstability + Computer aided flight = High manevruability

Why not utilize computer power like BIG planes do [fighters mainly]? With this design and flight correction via onboard computer you should get good preformance and handling... 1000MHz with 256MB DRAM for math?! It can handle about 20 servos and bunch of sensors to feed them realtime..
It can be Fully Functional Machine

WIKIPEDIA:
Quote:
Perceived benefits of a forward-swept wing design include

* mounting the wings further back on the fuselage, allowing for an unobstructed cabin or bomb bay, as the root of the wingbox will be located further aft, and
* increased maneuverability, due to airflow from wing tip to wing root preventing a stall of the wing tips and ailerons at high angle of attack. Instead, stall will rather occur in the region of the wing root on a forward-swept wing.

Possible drawbacks of a forward-swept wing include

* When using a conventional metal construction: A reduced divergence speed or, in order to avoid this, an increased wing weight, as wing stiffness needs to be increased.
This should be owercomed by composite materials cause we are not supersonic.. I think

Now i'm working on base fuselage shape to work out spacing of components and their fixing and protection in case of crash [hope it will not be on maiden flight ] Any advice in coinstructing planes is welcome.. Usefull utilities or calculators also. I'm new in this. For 6 months till now i was rewieving plane designs and their purpose so now i can tell i found purpose and design is next step..
Sorry for English
Sep 09, 2009, 10:57 AM
ninja's fly low
Thread OP
http://www.spyflight.co.uk/main.htm
Sep 09, 2009, 11:05 AM
ninja's fly low
Thread OP



Distribution of lift in my wings configuration...
Sep 09, 2009, 11:32 AM
ninja's fly low
Thread OP
Images in this post credit: http://www.barnardmicrosystems.com/L...crossing_I.htm

Briliant Aerosonde motor engeneering:






Let's not forget...!

Some Data: Aerosonde I

wingspan 2.86 m
length 1.74 m
wingspan / length 1.643
take off weight Wfr+Wfu+Wpl+Wav+Weng 13.1 Kg
frame weight 6.86 Kg
fuel weight 4.3 Kg
payload weight 0.6 Kg
avionics weight 0.43 Kg

engine type 4 stroke Enya R120
engine power 1.56 KW @ 12500 rpm
fuel rate at above rpm 0.694 Kg / hr
fuel used at endurance rpm 0.159 Kg / hr
engine capacity 24 cc
engine weight 0.91 Kg
power / weight 1.714 KW / Kg

endurance speed 121.111 Kph
cruise speed 90 Kph
max speed 193 Kph
endure_sp/max_sp 0.627

max altitude 20000 ft
endurance 27 hrs
operational range 3270 Km
actual range 3270 Km

And it's pusher!
Sep 09, 2009, 12:28 PM
7000mw of raw power!
rich smith's Avatar
Quote:
Originally Posted by cupsster
No both main wings swept forward... Reason?
Inflight unstability + Computer aided flight = High manevruability

Sorry for Englis
It looks like you are are not a total noob and actually aware of the issues involved which makes it a very interesting project. Please let us know how this works out.

PS your english is excellent. Much better than many from my own country.
Sep 10, 2009, 05:49 AM
ninja's fly low
Thread OP
Please comment on shape and configuration of aircraft.. Eg. wing profile, angles of wings etc.. Also I'm looking for some general method to determine CG for this configuration [ some experts here? i think it's in fuselage in front of main wing.. ] for electronic payload and energies suply distribution. Also for ideas about landing gear [retracts or fixed ?!? ]cause it's pusher configuration. Should have airelons and flaps as basic config.
Next step will be autopsy and sceletal examination after your c&c and refinements of design.

Pardone for misinformation: It's not biplane but canard config as you can see my bad. I my design canard also providing lifting force.. Profile E205 again here. But i fear of pitch-up in this case so I deciding if it should be Lifting-canard or Control-canard. But on the other side i think this config can reduce vibrations at low level high speed flight.. [quickly low profile from A --> B ]

Picture is JA 37 Viggen. It has also flaps on them. In blue. Close-coupled canard config.



So?
Sep 10, 2009, 05:59 AM
ninja's fly low
Thread OP
I found web based CG calc for now: http://adamone.rchomepage.com/cg2_calc.htm
Goin to try it
Sep 10, 2009, 10:59 AM
7000mw of raw power!
rich smith's Avatar
Quote:
Originally Posted by cupsster
It's not biplane but canard config[/B] as you can see my bad. I my design canard also providing lifting force..
That, as they say, "is a horse of a different color". Not only does canard add lift unlike tail but should improve stabilty by dropping nose when it stalls.

(John Denver might not agree )
Sep 10, 2009, 03:12 PM
Take a look at some of Burt Rutans aircraft.
Sep 10, 2009, 04:26 PM
ninja's fly low
Thread OP
Quote:
Originally Posted by BeefStake
Take a look at some of Burt Rutans aircraft.

WOW MAN! That Is a Person ! [ http://stargazer2006.online.fr/menu.htm ] Big thanx for tip.


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