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Old Jun 23, 2012, 01:43 PM
I just need one more plane..
kilabean's Avatar
United States, VA, Fairfax
Joined Jun 2012
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Originally Posted by chucksolo69 View Post
It depends on how much experience you have with planes other than the Stratos and Champ. I would say that you get another Champ or maybe one of the offerings COX has. They are relatively small, but larger than the champ I think and look to be tough as nails. As for a TX, I started out with a Spektrum DX5e, but soon found that trimming everytime I flew different planes was a real PITA. So, yesterday I got a new DX6i and have programmed 2 of my planes into it. So far I have my Champ and Super Cub programmed. What was great was that Spektrum is having a sort of special right now. I got the TX and 1 standard RX plus 2 other AR6115e RXs free. The total cost was $190.49 out the door. Great deal I thought.
Thanks. I was actually thinking of getting that dx6i. I've read a lot of complaints about the dx5e loosing signal mid flight. Wish I could bind the firebird stratos to the dx6i. That is one awesome plane.
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Old Jun 23, 2012, 03:46 PM
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USA, MD, Annapolis
Joined Feb 2005
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kilabean,
While the DX5E lacks some of the features it is a full range transmitter. If people are losing signal their setup is faulty or they just lose control and blame it on the radio. There is a lot of that going around these days...
Gary
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Old Jun 23, 2012, 04:17 PM
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I never had any problems with the DX5e. I just wanted a TX with model memory.
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Old Jun 23, 2012, 08:24 PM
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Flew mine Stratos with a GoPro video camera. Videos turned out great!. Though the Stratos could handle the weight of the GoPro... I don't recommend it except to thos experience flyers.Biggest problems I had was with lading but I think thats more to my inexperience. I have dried other lighter cameras but the video quality was not as good and since the gopro has a wide angle view the picture seems much more stable.
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Old Jun 24, 2012, 12:42 PM
Sir-Crash-a-Lot
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United States, IL, Edwardsville
Joined Jun 2011
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I have a problem today. The stratos binds to the radio but the motors won't work. The rudder and elevator work but no motors. What gives?
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Old Jun 24, 2012, 01:15 PM
Bye Bye VP Aug 2010 - Aug 2012
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United Kingdom, London
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Originally Posted by Mr.Firemouth View Post
I have a problem today. The stratos binds to the radio but the motors won't work. The rudder and elevator work but no motors. What gives?

Put the throttle trim all the way down.
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Old Jun 24, 2012, 02:23 PM
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United States, OK, Weleetka
Joined Dec 2000
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Went out flying today. One of the planes I took was my GF Paula's Stratos. I was hesitant to fly it. The wind was blowing pretty good. With some gusts.

I fly at an airport. And the windsock there was almost straight out. Stratos handled it with easy. You could see a little wobble as the model corrected for gusts. And the landings took a little more care. But the plane flew great in the wind! Even the landings were really a non event. Takes offs easy as always.

She was not able to come with me for another flying lesson. But my Lady's plane proved to be a great windy day plane!
Wes
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Old Jun 24, 2012, 05:11 PM
Bye Bye VP Aug 2010 - Aug 2012
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Originally Posted by 1987tc View Post
Went out flying today. One of the planes I took was my GF Paula's Stratos. I was hesitant to fly it. The wind was blowing pretty good. With some gusts.

I fly at an airport. And the windsock there was almost straight out. Stratos handled it with easy. You could see a little wobble as the model corrected for gusts. And the landings took a little more care. But the plane flew great in the wind! Even the landings were really a non event. Takes offs easy as always.

She was not able to come with me for another flying lesson. But my Lady's plane proved to be a great windy day plane!
Wes
Wind, as long as it isn't far in excess of the models max speed, won't be a problem especially at an airfield where turbulence will be less of a problem.

There's been a lot of rubbish spoken about wind and its effects in this thread. Aircraft fly in wind (relative wind) all the time without any problems. Get your average RC flyer out in anything above 10mph and they will have problems. Not because it's windy and the model can't handle it, but because they don't understand basic aerodynamics or how to avoid turbulence.
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Old Jun 24, 2012, 06:17 PM
Sir-Crash-a-Lot
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United States, IL, Edwardsville
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Originally Posted by Gerry__ View Post
Put the throttle trim all the way down.
Tried that and tried to unplug, plug in the battery several times. It won't activate the motors. I tested the motors with a 3.7v battery and they are fine. The board isn't sending the voltage to the motors. Wonder what is up?
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Old Jun 24, 2012, 07:18 PM
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wind mainly matters when the model (or any aircraft) is close to the ground. it changes groundspeed. but not airspeed.

there is one part of the airport that has a known windsheer at times.
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Old Jun 25, 2012, 07:17 AM
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For an example, assume 10 mph airplane stall speed and 5 mph wind speed.

If 1/2 throttle provides 10mph in calm air and we're heading into the 5mph wind, the airplane is performing with 15mph "air" speed. When you turn 90degrees, your speed becomes 10mph "air" speed as the wind speed effect is zero on the "air" speed.

When you turn downwind, your "air" speed becomes 5mph, 10 mph from the 1/2 throttle and -5 from the wind. In this case, you would need to advance the throttle enough to yield an additional +5mph to net 10mph air speed.

You are correct in that the airplane only cares about "air" speed. It does not know or care about wind speed or ground speed, only the combined amount of "air" going over the wing.

-- ggunners
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Old Jun 25, 2012, 08:01 AM
Bye Bye VP Aug 2010 - Aug 2012
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Originally Posted by ggunners View Post
For an example, assume 10 mph airplane stall speed and 5 mph wind speed.

If 1/2 throttle provides 10mph in calm air and we're heading into the 5mph wind, the airplane is performing with 15mph "air" speed. When you turn 90degrees, your speed becomes 10mph "air" speed as the wind speed effect is zero on the "air" speed.

When you turn downwind, your "air" speed becomes 5mph, 10 mph from the 1/2 throttle and -5 from the wind. In this case, you would need to advance the throttle enough to yield an additional +5mph to net 10mph air speed.

You are correct in that the airplane only cares about "air" speed. It does not know or care about wind speed or ground speed, only the combined amount of "air" going over the wing.

-- ggunners
Utterly wrong from beginning to end.

An aircraft capable of cruising at 10mph at half throttle will maintain that speed upwind, downwind or crosswind. Wind (movement of and air mass) only affects landing, take off and navigation, it has no affect on aerodynamics. Wind only adds to, or subtracts from, groundspeed.
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Old Jun 25, 2012, 09:04 AM
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Wind speed and especially turbulence can have strange effects on aircraft flight path over the ground that are hard to anticipate, though. I fly free flight planes and trying to get a consistent flight pattern on a windy day is really hard. If you're lucky, the plane will climb to a reasonable altitude, get pointed into the wind and rise even further. If you're not, the plane will go cross wind too close to the ground, get into a nasty attitude and stall.

I'm an R/C beginner, and find it really hard to separate ground speed from airspeed when I'm in control. I have an r/c glider where I can't change throttle to make turns quicker. I need to anticipate the point on the ground where i need to turn a lot earlier on a down wind leg. I have tried both glow and e-powered trainers also, and wind just adds to the complexity. Maybe advancing throttle down wind is a strategy to make turning quicker.

Learning to fly is a very personal business. If understanding aerodynamics takes away some of the nerves, very good. Getting a good start in relatively calm air is still good advice.
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Old Jun 25, 2012, 09:20 AM
Bye Bye VP Aug 2010 - Aug 2012
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The reason a lot of model aviators have such trouble with basic aerodynamics is because they don't have any instruction, don't bother to read up on the subject and, instead, rely on their own poor observation and reasoning skills. Of course, reality works in a slightly unintuitive way:

http://www.bmfa.org/publications/files/EUA.pdf

Quote:
BRIEFING 3 - THE EFFECT OF WIND ON THE AIRCRAFT IN FLIGHT

There is probably more nonsense talked and written on this subject than any other connected with the practical side of flying! In reality, the matter is very simple - it is just that so many people find it hard to accept.

Provided that your flying area is clear of vertical obstructions (houses, trees, hedges, hangers etc.) the wind will blow fairly steadily from a constant direction once the aircraft is above about 50ft. Below this height, and depending on the surface of your flying site and the proximity of obstructions, there will be some turbulence both vertical and lateral.

Once you understand this principle you will see that a turn from an into wind heading to crosswind will appear to be a fairly sharp turn when seen from the ground and a turn from downwind to crosswind will appear to be slow and elongated. You must accept these visual effects for what they are and remember at all times that if you have not altered your throttle setting and the aircraft is at constant height then your airspeed is constant and the aircraft is in no danger of stalling.

Once the aircraft has climbed out of this turbulent level it is, in effect, flying in a steadily-moving block of air. Thus, with a windspeed of 10 mph the block of air in which your aircraft is flying is moving downwind at a speed of 10 mph. So, your aircraft which flies at a speed of, say 20 mph will appear to be doing only 10 mph when flying into the wind (flying speed less windspeed) and 30 mph when flying downwind (flying speed plus windspeed). In point of fact your aircraft knows nothing about the windspeed at all and is flying at a steady 20 mph all the time!

You will often hear people say that their aircraft tends to climb when turning into wind and dive when turning downwind. What is really happening, of course, is that they are subconsciously trying to compensate for the apparent variation in speed and themselves causing the aircraft to climb and dive.

One major point to remember - don’t try to keep your apparent speed constant or you will find that you will have your aircraft at full throttle when going into wind and stalling when it goes downwind.

If you find all this difficult to visualise, try to imagine yourself piloting a model boat from the bank of a fast-flowing river. In this situation you will find that you can understand the problems outlined above.

When flying in a wind of any strength you will find that your model can be carried away from you very quickly when it is travelling downwind. It is essential not to let it go too far. If you do, not only do you stand a good chance of losing control because you just can’t see the aircraft properly, but it is a long and slow slog back to your position against the full strength of the wind. There is another major factor - if your engine stops it will be difficult or impossible to glide the aircraft back to your position if it is too far downwind.

So always try to keep your aircraft upwind of your position as much as possible. By doing so you will save yourself from falling into some very difficult situations.
Too many people think they know how their models fly but actually don't, and then get all cocky when they get corrected. There really is no excuse for people spreading misinformation given that the knowledge is so easily at hand via the internet.
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Old Jun 25, 2012, 09:32 AM
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Your statement about not stalling in turns to cross wind is correct, if you maintain the plane in a stable attitude. Free flight planes with dihedral are often not so lucky, particularly in the turbulent layer you mention. R/C flyers who try to tighten that down wind turn with rudder or aileron can get into a similar fix.
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