Air show pictures!!!

[Kaw1000]

Here are some pictures from an R/C air show here in Cincy!!!

[Halo]

Fun pics.  How are the radio frequencies kept from interfering with each other in the same airspace?

[storch]

nice pics.  a question how do the pilots of the multi engine planes synchronize the props?

[Kaw1000]

Halo...there is a new radio system out now......It revolutionized the R/C world....There is a special reciever that goes in the plane ..the radio then identifies that reciever.....they say that this new system can find up to a Million different frequencys

Storch ....I have an electric P-38...the only issue is the counter rotating props........One prop is made differently than the other.....so there no counter torque...ie.....the plane doesn't vear off to left or right...because of torque

[eskimo2]

Originally posted by Halo
Fun pics.  How are the radio frequencies kept from interfering with each other in the same airspace?

Each radio and receiver pair is tuned to a different frequency.  Colored flags on the transmitter antenna indicate the frequency.  Dedicated fields have boards where you sign out on a particular frequency; you never turn your transmitter on without checking in first.

[Kaw1000]

Originally posted by eskimo2
Each radio and receiver pair is tuned to a different frequency.  Colored flags on the transmitter antenna indicate the frequency.  Dedicated fields have boards where you sign out on a particular frequency; you never turn your transmitter on without checking in first.

Right on!! This is the old system...there is a new system  on the market....its so new that there are few that have it....but it will eliminate this old system!

[Maverick]

I have one of the new systems on my electric helicopter. No more checking to keep from interferring with another's rig. Nice use of digitalization technology.

[eskimo2]

Originally posted by Maverick
I have one of the new systems on my electric helicopter. No more checking to keep from interferring with another's rig. Nice use of digitalization technology.

How does it work?

Does every TX and RX have it's own totally unique frequency?

[Kaw1000]

Originally posted by Maverick
I have one of the new systems on my electric helicopter. No more checking to keep from interferring with another's rig. Nice use of digitalization technology.

What kind do you have Mav?............I have a mx 400 I'm trying to build....had a honeybee king...it was junk......There was two heli drivers at the show....they sold all there gas Choppers, and are all electric now....these guys were good real good!!!

[Maverick]

I just have a Blade CX2 coax heli. It's strictly a trainer but a blast to fly anyhow. I couldn't possibly afford the standard heli's. I'd be making splinters by the wheel barrow load.

I did get the FS simulator as well. A GREAT investment in saving parts and models. Pricey, but far less expensive than a half dozen crashes and rebuilds.

[FBBone]

Originally posted by storch
nice pics.  a question how do the pilots of the multi engine planes synchronize the props?

Storch,

When flying multi-engine gas planes you use a photo-eye tachometer and match the engines RPMs as close as possible using the fuel mixture.

The tach:

[FBBone]

Originally posted by eskimo2
How does it work?

Does every TX and RX have it's own totally unique frequency?

AFAIK, once the RX "sees" its TX, it will simply reject all other RF signals.  They operate in the 2.4GHz band.

These guys started it all in 2.4GHz

[Maverick]

Originally posted by eskimo2
How does it work?

Does every TX and RX have it's own totally unique frequency?

The best analogy I can give you is that it's very similar to garage door openers frequency discrimination. The receiver and tranmsitter are "introduced" to each other and make connection when they are powered up after the introduction. They rotate until they find a clear discreet signal from the other component that they were matched to. If they don't find the specific piece of equipment they don't operate.

If you have to get a replacement receiver or transmitter, there is a process to use to make the handshake bewtween the 2 units then you can operate as before.

[eskimo2]

Originally posted by Maverick
The best analogy I can give you is that it's very similar to garage door openers frequency discrimination. The receiver and tranmsitter are "introduced" to each other and make connection when they are powered up after the introduction. They rotate until they find a clear discreet signal from the other component that they were matched to. If they don't find the specific piece of equipment they don't operate.

If you have to get a replacement receiver or transmitter, there is a process to use to make the handshake bewtween the 2 units then you can operate as before.

Holy cow, that's amazing!
I have some old radios that are maybe 20 years old; are they even legal any more?

[Bosco123]

heres what happens in model airplanes.
diffrent frequencies or the new spectrum radio(which I have on a ll my planes) which finds its own frequency, is how we get started. Most engines have a screw or needle valve to tune the engine to the right RPM's. there are many diffrent engines but 4 main types of engines

Glows: have the needle valve
Gas: has a screw for tuning
electric: no tuning
Turbine: no tuning

I have a few airpalens myself so I know a few things. if your a modeler you know what types of plaes these are or a histroy buff

Zirroli F6F hellcat
Komet ME-163
Fiat centauro G-55
Hangar-9 P-51
and a P6-E "Hawk" those are a few

I have a video of my hellcat on youtube its the big blue thats landing
http://www.youtube.com/watch?v=4M9IvMIa0Es