SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Jan 31, 2013, 09:39 AM
Registered User
Joined Jan 2013
88 Posts
Discussion
Do I really need telemetry?

Getting in a FlySky 9x on Friday and wondering if I need to worry about upgrading it to Telemetry for my trainer and a smaller low wing sport plane or just leave it? I mean for aircraft this size I don't want to be adding any more weight as it is with the telemetry hub and all the sensors (no room either). All my batteries are converted to LiFe so I'm not too worried about it dying in flight and I'm going to run the new Evolution 10GX gas engine in the trainer and bigger gassers in everything else so the fuel level won't work either. Anyone see a reason to worry about it? I'm planning on picking up the new FrSky 12D when it comes out this spring/summer anyway so I'm leaning towards no but if I'm missing something please let me know.

Thanks
scottydsntknow is offline Find More Posts by scottydsntknow
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 31, 2013, 10:56 AM
Suspended Account
Joined Mar 2012
99 Posts
They don't have fuel telemetry for gas?
Craig Downer is offline Find More Posts by Craig Downer
Reply With Quote  (Disabled)
Old Jan 31, 2013, 11:04 AM
Registered User
Joined Jan 2013
88 Posts
The gas doesn't show up properly like glow/meth does. Something about the conductivity of the fluid or some such.
scottydsntknow is offline Find More Posts by scottydsntknow
Reply With Quote
Old Jan 31, 2013, 12:11 PM
Who Dat!
GeetarJoe's Avatar
United States, LA, New Orleans
Joined Sep 2011
650 Posts
rx voltage telemetry is very useful. other than that, not really.
GeetarJoe is offline Find More Posts by GeetarJoe
Reply With Quote
Old Jan 31, 2013, 01:44 PM
Registered User
earlwb's Avatar
USA, TX, Grapevine
Joined Dec 2008
13,120 Posts
I usually don't see a need for telemetry in a RC airplane. But some people think it is great. So I guess it depends. The RC helicopter people seem to really get into the details of using telemetry for everything on their heli's though. I have bought some telemetry gear, but I haven't done anything with it yet I guess I ought to, as I have had the stuff for quite a while now though.

I found that a simple free iPhone Doppler Speed Shiuft speedometer works fairly well for airspeed. I setup my phone to record and do some flybys with the plane. Then later I can average the results and use the speed to determine the RPMs that the engine would need to turn with the propeller on it to see how it is doing. It isn't super accurate but it works for me.

Of course I have thought that the engine RPMs in the air and maybe the GPS device or airspeed device might be nice to have as one could determine what the engine RPMs are in the air as well as maybe the airspeed too. The battery voltage monitor is of mixed value as with NMH or LiFe battery packs, the cell voltage stays at 1.1v until the battery runs down and then very quickly goes towards Zero then. So you don't have time to react to the voltage dropoff. But maybe something that tried to measure the current being drawn and calculate the milli-amp hours being used up could be useful. There are some telemetry fuel tank sensors, but honestly with a airplane going all over the place at all kinds of different attitudes I don't see how it could be accurate enough to be useful.

I don't know if the engine temperature sensor would be useful in a airplane or not. But it might give one a heads up if something odd is happening. I think that logging all the flights and seeing the results over time might be useful, but it is hard to say as to how useful with a airplane. With RC heli's it is different as if the current draw increases over time or the rotor blade RPMs change, then you know something is happening you need to probably take care of.
earlwb is online now Find More Posts by earlwb
RCG Plus Member
Last edited by earlwb; Jan 31, 2013 at 01:51 PM. Reason: add more information and typo correction
Reply With Quote
Old Jan 31, 2013, 02:14 PM
Registered User
Joined Jan 2013
88 Posts
Well, honestly cost is the same, I just have to wait like another week for it to come in... well cost is not the same after shipping, I missed the boat on a few thing on HobbyKing, also want to go all FrSky since I am going to be getting the 12D when/if it comes out this year so I'm going to return the FlySky 9x when it comes in on Friday and I placed an order on HK today for a Turnigy 9x without any transmitter and a FrSky 2.4ghz ACCST module/8 channel receiver with telemetry. Might not use it much with the trainer but I will when I move up to bigger/more expensive aircraft. The GPS feature alone would be worth it if a $1k+ model goes down out of sight somewhere. I just honestly didn't want to wait another week/week and a half and then have to eat the shipping costs but oh well, got a few other things I needed from HK and shipping back to HobbyPartz will be around $10.
scottydsntknow is offline Find More Posts by scottydsntknow
Reply With Quote
Old Jan 31, 2013, 07:47 PM
Registered User
Jacksonville Fla.
Joined Mar 2007
2,214 Posts
I fly giant scale I don't have telemetery anything nor, I am pretty sure, do I want it
jetmech05 is offline Find More Posts by jetmech05
Reply With Quote
Old Jan 31, 2013, 08:09 PM
FloridaFlyBob's Avatar
United States, FL, Fort Myers
Joined Nov 2011
1,220 Posts
I like the battery voltage and antenna fades and losses
FloridaFlyBob is offline Find More Posts by FloridaFlyBob
Reply With Quote
Old Feb 01, 2013, 12:16 AM
Registered User
Reginald's Avatar
Belgium
Joined Aug 2004
3,755 Posts
Quote:
Originally Posted by jetmech05 View Post
I fly giant scale I don't have telemetery anything nor, I am pretty sure, do I want it
We do fly big (expensive at that) scale as well and do not really see the need for it. I noticed that there is GPS in my latest camera, do'nt need that either. Now, maeby if I could obtain some device metering my footsteps, is there some shoe make producing this already ? I am really impatient to have a set of those.
Reginald is offline Find More Posts by Reginald
Reply With Quote
Old Feb 01, 2013, 03:31 AM
Registered User
Staffs, UK
Joined Nov 2003
10,556 Posts
We haven't needed telemetry for the last 50-60 years so it doesn't seem likely that it's suddenly become vitally necessary .

Another nice toy to have but that's about it really. And if you're still in the relatively early phases of learning to fly I'd say that's quite enough to concentrate on without having to cope with any additional distractions.

Steve
slipstick is offline Find More Posts by slipstick
Reply With Quote
Old Feb 01, 2013, 09:16 AM
Suspended Account
Joined Mar 2012
99 Posts
Quote:
Originally Posted by Reginald View Post
We do fly big (expensive at that) scale as well and do not really see the need for it. I noticed that there is GPS in my latest camera, do'nt need that either. Now, maeby if I could obtain some device metering my footsteps, is there some shoe make producing this already ? I am really impatient to have a set of those.
They have those, I think they are called pedometers.
Craig Downer is offline Find More Posts by Craig Downer
Reply With Quote  (Disabled)
Old Feb 01, 2013, 03:16 PM
FloridaFlyBob's Avatar
United States, FL, Fort Myers
Joined Nov 2011
1,220 Posts
Quote:
Originally Posted by slipstick View Post
We haven't needed telemetry for the last 50-60 years so it doesn't seem likely that it's suddenly become vitally necessary .

Another nice toy to have but that's about it really. And if you're still in the relatively early phases of learning to fly I'd say that's quite enough to concentrate on without having to cope with any additional distractions.

Steve
And they invented color TV in the last 50-60 years and we all have one of them
FloridaFlyBob is offline Find More Posts by FloridaFlyBob
Reply With Quote
Old Feb 01, 2013, 04:12 PM
Registered User
Joined Jan 2013
88 Posts
Lol I was just thinking that. Just because its new doesn't mean its bad. Signal strength alone is a good thing to have. Those running glow/meth get a friggin gas gauge. I can't tell you how many times I wished I knew how much fuel I had left as a kid learning to fly. Of course now I'm switching to gasoline and the gauges won't read that either haha.
scottydsntknow is offline Find More Posts by scottydsntknow
Reply With Quote
Old Feb 01, 2013, 05:52 PM
I bail out, anywhere, anytime
Taurus Flyer's Avatar
The Netherlands, OV, Almelo
Joined Nov 2010
2,957 Posts
Quote:
Originally Posted by scottydsntknow View Post
Lol I was just thinking that. Just because its new doesn't mean its bad. Signal strength alone is a good thing to have. Those running glow/meth get a friggin gas gauge. I can't tell you how many times I wished I knew how much fuel I had left as a kid learning to fly. Of course now I'm switching to gasoline and the gauges won't read that either haha.
Scotty, I read you have a lot of questions and less to "show", so be carefull when writing about "glow"!
An example, look at that landing light! Why is it switched "on"?
Indeed, during winterdays it can be dark in a very short time so my landing light is automatically switched on when the low level limit of fuel is reached during the flight. Engine was still "on" when I made the first photograph after the last flight. Second photograph is made short after the first one!
Telemetry in optima forma!!



Cees
Taurus Flyer is offline Find More Posts by Taurus Flyer
Last edited by Taurus Flyer; Feb 01, 2013 at 06:02 PM.
Reply With Quote
Old Feb 01, 2013, 06:03 PM
Registered User
Joined Jan 2013
88 Posts
Oh I understand it is a luxury, but when the cost is about the same I'll go for the luxury. $50 for a FrSky module and receiver, $50 for a Turnigy 9x or XR... vs $500+ for an Aurora or jeebus knows how much for a Futaba/JR.

I do like the idea of a LED or light for a low fuel indication though. Is there some sort of sensor system you can buy or is that something you just DIY?
scottydsntknow is offline Find More Posts by scottydsntknow
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Is this really a Mirage?........It needs a new name...Ideas? hog2soar Sailplane Talk 42 Feb 02, 2013 05:05 PM
Discussion Will clubs really do this? mkranitz Other Websites 4 Jan 25, 2013 12:22 AM
Discussion Need a Really Large Swashplate harryinhbg Large Electric Helis 1 Jan 18, 2013 11:38 AM
Discussion What do Tea Party Republicans really want? Broken Wings Life, The Universe, and Politics 93 Jan 06, 2013 03:40 PM
Discussion Jazz Programming Card - What do you really need to do?? GBR2 Kontronik 2 May 04, 2009 02:03 PM