I am considering a parachute on a 7Kg (15lb) UAV.I have found various formulas on the web, but the question is what parameters to use.What rate of descent should I choose so that, after a parachute…Continue
"Just what I need for my servo driven scanner, but some easily fixed hardware problem remain - how do you mount it on anything? Odd shape. No lugs or screw holes. Which way does the lead come out that facilitates mounting? Is there any means of cable…"
"With most RC systems one channel will output a positive pulse between 1 and 2 milliseconds every 20 milliseconds.
The width between 1 and 2 milliseconds is proportional to the transmitter stick position.
There are plenty of circuits available on the…"
I have built a number of aircraft from this manufacturer.
Do not take the parts that are supplied as a guide as to how to assemble the aircraft.
You must depend on your own capability in building a large RC aircraft. By all means use some of…"
"CanberraUAV at CMAC....Sure, we started off small. Now, we have installed solar powered electrics with a security system, webcam of the field (see weathercam on http://www.cmac.org.au/default.htm ), clubhouse lighting, and a LiPo…"
"Such an airframe from a starving ultralight manufacturer might cost in the order of $40,000 - but the automated avionics would be up to you.
For a UAV manufacturer, there are alot more expenses that would be amortised over the small number of…"
"Maybe I should have been more specific in my earlier post.
If you were to build or buy an aircraft for this task, this, or something a little larger, is the sort of airctraft you will need.
It is significantly larger than the sort of thing we cover…"
"Purely from a rank amateur engineer's point of view, it looks as though the moment of inertia of the assembly in pan is at the heart of the matter. The length of the tilting motor beside the landscape mounted camera takes alot of torque…"
"The essence of a multirotor is the simplicity of fixed pitch props. Once you go to variable pitch props you may as well go for a standard helicopter.
How about about one central petrol motor with a fixed pitch prop which does the heavy lifting,…"
"Surely the Flarm system http://www.flarm.com/ is well enough established to fulfil this purpose.
Only aircraft performing doing work below 500 ft outside controlled airspace would have to carry it.
The unit is not too big to be carried on…"
"The technology you require has already been developed and is in use in anti-poaching applications in Africa.
In Australia we have just had the Outback Challenge where a lost bushwalker is searched for in a 1 by 2 km area, 5km from the airfield. Most…"
"Toby, I think you have to look more carefully at the failure modes you are trying to protect yourself against.
The most likely power problem you are likely to encounter is the speed controller failing. The next is a wiring problem. Both of these are…"