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Old 09-11-2016, 08:58 PM   #1
hlaija51
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Carleton University New UAV Inquiry


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Hello,

Please allow me to introduce my self. My name is Jason Hlaing, I am a student of aerospace engineering at Carleton University, and test pilot for our research UAVs. Iím also a MAAC registered and licensed RC pilot with 9 years of flying experience.

Unfortunately one of our research UAVs decided it wanted to have a career change in mid-flight from research and surveying to tree removal (it suffered a mid spar failure during flight, and spiralled into a tree). We are in the market for a new off the shelf RC aircraft that we can turn into a survey UAV, and one of the aircraft which seems to fit the bill is the Hanger 9 33% scale Piper Pawnee. However we are having a rather difficult time finding any specifications on the aircraft. On behalf of the UAV research team at Carleton University I would like to inquire if anyone has any information on the following questions below:
  • How does the aircraft fly?
  • Does anyone know what the stall speed is?
  • Does anyone know what the payload of the aircraft is beyond the main RC gear required for flight?
  • What is the AUW of the aircraft?
  • What is the maximum weight that anyone flown this aircraft at?
  • Does anyone have any scale 3 view drawings, or 33% scale plans for the aircraft?
  • Does anyone have any photos of the interior of the aircraft, and the area accessible via the two hatches on the aircraft?
  • Is there anyone in the Ottawa area who has one of these which would be willing to let us have a look at it?

I look forward to your reply.


Sincerely:

Jason Hlaing
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Old 09-11-2016, 09:18 PM   #2
Mike Sebastien
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Re: Carleton University New UAV Inquiry

Download the manual at Hangar 9.

http://www.horizonhobby.com/product/...cc-arf-han5190


Why did you decide on that aircraft?
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Old 09-11-2016, 09:31 PM   #3
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Re: Carleton University New UAV Inquiry

You will be better off with this: https://amr-rc.com/products/super-de...f?taxon_id=369

With wing area this size you can load it down with 20 lbs of payload and it'll increase your stall speed by about 15kph. Lol

As it sits, the stall speed of the Decathalon is really low.

Cabin is huge, remove seats and it's really cavernous in there.
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Old 09-11-2016, 09:37 PM   #4
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Re: Carleton University New UAV Inquiry

Totally aggre with Joe!
Air wagon I had, (different size) was probably the worst flying plane I have ever owned!
When I read this post, decathlon came straight to mind.

Decathlon! Also gives you great STOL capabilities. You could never do that with a wagon/Pawnee.

Check this out!
+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
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Old 09-12-2016, 01:02 AM   #5
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Re: Carleton University New UAV Inquiry

nm...................................

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Old 09-12-2016, 08:58 AM   #6
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Re: Carleton University New UAV Inquiry

Hi Mike,

The reason for electing the Piper Pawnee is for size and accessibility. The aircraft will be used for geomagnetic surveying research, and the magnetometers need to be mounted at least a meter away from servos or anything metal. The sensors and payload will be quite heavy and require as substantial amount of room inside the aircraft for placement. The aircraft will also need to be able to fly slowly, and remain steady under moderate wind conditions. The Hanger 9 33% scale Piper Pawnee seems to fit the bill for these requirements.


Sincerely:

Jason Hlaing
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Old 09-12-2016, 09:44 AM   #7
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Re: Carleton University New UAV Inquiry

Jason, just because it is a model of a crop duster does not mean it was designed to be anything more than a lightly loaded sport flier. I would carefully consider the input of the guys who have commented above.
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Old 09-12-2016, 10:59 AM   #8
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Re: Carleton University New UAV Inquiry

I would have thought something like a Great Planes giant Stik would have been a good choice. Lots of wing, but would probably need something built to carry the sensors, etc.

Go to the MAAC website, and look up clubs in the Ottawa area. Give whoever is the contact for the club an email or call. They would most likely direct you to someone who might have one.

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Old 09-12-2016, 11:41 AM   #9
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Re: Carleton University New UAV Inquiry

I think you will have great difficulty finding a RC plane this size or smaller where you can get 1m away for all servos and other electronics.

This is the reason the full scale mag survey birds drag the sensor array like a advertising banner.

How heavy is heavy? How big is big?

33% Pawnee flap and ail servos look like they are both within a 1m of CL of fuse.
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Old 09-12-2016, 03:39 PM   #10
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Re: Carleton University New UAV Inquiry

For the Decathalon, almost all the servos are 1M away from the cockpit. The receiver can be mounted in the tail, and the Magnetometers can be slung beneath the airframe.

Plus with the square wing planform of the decathalon, you'll be stretched pretty far to find a better airframe that suits your requirment. With the equpment slung below, you'll it will be super stable since you'll be lowering the CG even further.
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