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Old Aug 07, 2012, 03:17 AM
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Need your suggestions for the new UAV


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Last edited by ELERC; Aug 20, 2012 at 10:38 PM.
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Old Aug 07, 2012, 07:15 AM
Nīmā is offline
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No ceiling for my altitude
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A power-plant include 3 engines, Is it really necessary?
You can do the same with just 1.
Your plan seems to be interesting, I like to know your purpose for using more engines (and reduce of drag)?
Old Aug 07, 2012, 09:07 AM
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That design will be very sensitive to pitch inputs and center of gravity.
Most certainly will require a built in, tuned stabilization system or autopilot.
Need a duration of an hour or more for a small, tactical UA.
Reduce the number of moving parts (use one motor)
Must be rugged and modular (easy to switch payloads)
Must protect the payload and electronics
Old Aug 07, 2012, 01:50 PM
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A true UAV has the camera on the underside of the aircraft. It is hard to see your subject when your airplane is blocking the camera. You need a retractable camera system like I have designed. Allows for a pan and tilt camera undertheath the plane but retracts for takeoff and landing. This will also keep clean airflow moving over the vertical stabilizer where a camera on top will disrupt the airflow and reduce control.
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Old Aug 08, 2012, 04:03 AM
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Quote:
Originally Posted by Nīmā View Post
A power-plant include 3 engines, Is it really necessary?
You can do the same with just 1.
Your plan seems to be interesting, I like to know your purpose for using more engines (and reduce of drag)?

Hello,yes, we decide to use two 22/28mm diameter outrunners(pulling in front) or single 35mm ( tail pushing)
Old Aug 08, 2012, 04:05 AM
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Quote:
Originally Posted by CenTexFlyer View Post
That design will be very sensitive to pitch inputs and center of gravity.
Most certainly will require a built in, tuned stabilization system or autopilot.
Need a duration of an hour or more for a small, tactical UA.
Reduce the number of moving parts (use one motor)
Must be rugged and modular (easy to switch payloads)
Must protect the payload and electronics
Thank you for the suggestions.
The plane will be made from EPO and modular.
For the profile design , we will test and improve.
The video for the wood plane will be uploaded soon, and hope for your suggestions then
Old Aug 08, 2012, 11:30 AM
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No ceiling for my altitude
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Do you have any plan for reduce of operational range?
By the way ... (excuse me that I ask more questions, I'm just a bit curious!) ... What is the use of this drone? just simple URAV or ... ?
Old Aug 09, 2012, 09:07 PM
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What sort of UAV will be more popular?
Old Aug 13, 2012, 02:24 AM
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I think before designing the airframe you have to decide what the most popular application will be. There really is no Swiss Army sUAS they are generally designed for one task only. Plenty of examples here http://www.suasnews.com

My design criteria access to a vertically mounted camera that I can get at with my fat fingers. At the moment I really like putting cameras in wings away from the centre line as it keeps them just a little bit further from the ground. With a single prop it also keeps them further from vibration as well. (This is in a normal airframe configuration, I actually think flying wings make the best sUAS as they have less bits to fail)

As Gene says you have to watch out for pitch in planks, especially when operating at speed.

The airframe market is fraught with danger it will be copied! Jimmy Prouty, Chris Mc Nair, Rob Swynerton, and Gene have all had airframes and designs ripped off by companies in America no less and these are just the ones I know about.
Last edited by Gary Mortimer; Aug 13, 2012 at 02:30 AM.
Old Aug 13, 2012, 10:53 AM
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[QUOTE=Gary Mortimer;22430612]I think before designing the airframe you have to decide what the most popular application will be.
QUOTE]

That's a great point, Gary. The smart way to design a platform is to first identify the payloads it will carry and the environment it will operate in. Only then can you start to design and optimize the airframe.
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