Question Ref Spektrum fades/frames figs.
11-25-2007 | 06:24 PM
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From: Oxford, UNITED KINGDOM
Question Ref Spektrum fades/frames figs.
Hi,
I have flown my Flash on 2.4Ghz today for the first time. I had 4 flights and it worked perfectly, however when I look at the data ref the number of fades/frame losses after each flight I am slightly concerned. Here are the results.
Flight 1- A 40,B 72, L 64, R 244, F 0, H 0
Flight 2 - A 141,B 136, L 69, R 234, F 0,H 0
Flight 3 - A 255, B 253, L 555, R 801, F 46, H 0
Flight 4 - A 65, B 39, L 58, R 186, F 0, H 0
Done a bit of research on previous threads and the figures look OK, apart from flight 3 which looks a bit odd. As there are people on RCU who are far more experienced then me with using spektrum, can anyone offer any advice. Are the figures OK? Have I anything to worry about?
Also, I am sure it has been asked before but the L and R figures refer to Left and right external antenna's. How do I know which is left and right?
I also thought it might help posting a picture of the installation. Note the second remote receiver is at the rear of the plane in the fin.
Thanks.
Geoff.
I have flown my Flash on 2.4Ghz today for the first time. I had 4 flights and it worked perfectly, however when I look at the data ref the number of fades/frame losses after each flight I am slightly concerned. Here are the results.
Flight 1- A 40,B 72, L 64, R 244, F 0, H 0
Flight 2 - A 141,B 136, L 69, R 234, F 0,H 0
Flight 3 - A 255, B 253, L 555, R 801, F 46, H 0
Flight 4 - A 65, B 39, L 58, R 186, F 0, H 0
Done a bit of research on previous threads and the figures look OK, apart from flight 3 which looks a bit odd. As there are people on RCU who are far more experienced then me with using spektrum, can anyone offer any advice. Are the figures OK? Have I anything to worry about?
Also, I am sure it has been asked before but the L and R figures refer to Left and right external antenna's. How do I know which is left and right?
I also thought it might help posting a picture of the installation. Note the second remote receiver is at the rear of the plane in the fin.
Thanks.
Geoff.
11-25-2007 | 06:39 PM
#2
RE: Question Ref Spektrum fades/frames figs.
Disconnect one of the remotes, start up the tubine and taxi around a few minutes, come back and take another reading and you will find out which one is L or R.
11-25-2007 | 07:12 PM
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From: Mexifornia,
RE: Question Ref Spektrum fades/frames figs.
I have used this system in two of my jets and have been extremely pleased with each. From your data I would say that everything other then flight #3 is acceptable, but I would move the "R" antenna to another location to see if you get better results. I am guessing that the "R" may be the one in your vertical fin, and the lengthy lead may cause the lower numbers.....but this is just a guess. Your system seems to be operating perfectly, don't dwell too much on flight #3.....I have had the same type of readings on one flight, then perfect the rest. Either way, the system works above my expectations and I will not fly another model without it.
Good luck,
Dave
Good luck,
Dave
11-25-2007 | 07:20 PM
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From: Canyon Lake, TX
RE: Question Ref Spektrum fades/frames figs.
FWIW, I get numbers comparable to your flights 1, 2, and 4. Flight 3 is higher than I have seen, but at least you did not get any holds. Rapid rolling maneuvers seem to increase the fade count, and orienting the transmitter antenna vertically (rather than straight out) seems to reduce the fade count. I've got about 35 flights with a Spektrum setup and it has worked well so far. I'm flying an air frame slightly smaller than the Flash. Thanks for starting the thread - the info should be useful.
11-25-2007 | 08:09 PM
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From: tamarac, FL
RE: Question Ref Spektrum fades/frames figs.
Even with flight three's reading being high you only had 46 frame losses but no holds it takes 44 consecutive frame losses to egual one hold so they were not consecutive frame losses. Also I have noticed that if you are wright next to the model at some angles you can cause your antena counts to go up so they may of been high before you took off. I usally check mine before I fly as the canopy is going on. To make sure what ever reading I have are only from the flight and not while I am next to the model. To find out easily since you have the data loger turn on the system and remove one of the remote antenas and scroll through the data loger until you see ----- reading and thats it.
11-25-2007 | 08:15 PM
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RE: Question Ref Spektrum fades/frames figs.
I have well over a hundred flights on this system, and have never not once plugged in the data logger, and never once had a moment where I didn't feel 100% control over my jets.
And what I don't know is apparently not hurting me
Four jets with the system and growing every day..........
And what I don't know is apparently not hurting me
Four jets with the system and growing every day..........
11-25-2007 | 08:20 PM
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From: Henderson, NV
RE: Question Ref Spektrum fades/frames figs.
Geoff,
Your flight #3 numbers "seem" high, however your number of fades in WELL below what I have EVER gotten. It is not uncommon for me to get up to 100 fades (I am only using one external antennae). Like Sean, I have not ever felt so much as a hint of not being in control (other than my pure lack of ability). When you start seeing "Holds".....become concerned. Until then, burn Kero.
Your flight #3 numbers "seem" high, however your number of fades in WELL below what I have EVER gotten. It is not uncommon for me to get up to 100 fades (I am only using one external antennae). Like Sean, I have not ever felt so much as a hint of not being in control (other than my pure lack of ability). When you start seeing "Holds".....become concerned. Until then, burn Kero.
11-26-2007 | 02:43 AM
#8
RE: Question Ref Spektrum fades/frames figs.
Geoff
You number people...
Your figures could be improved but as many have said the totals for the flight are not consecutive, so I would not worry...your 35 mHz gear was going in and out throughout the flight...you just didn't have a way of checking!
Make sure you don't hold your Tx right next to the model before you take off, you can swamp the system
Dave
You number people...
Your figures could be improved but as many have said the totals for the flight are not consecutive, so I would not worry...your 35 mHz gear was going in and out throughout the flight...you just didn't have a way of checking!
Make sure you don't hold your Tx right next to the model before you take off, you can swamp the system
Dave
11-26-2007 | 03:53 AM
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From: Oxford, UNITED KINGDOM
RE: Question Ref Spektrum fades/frames figs.
All,
Thanks for all the responses, really appreciated.
Two things of interest. Firstly, when starting the model I was holding the Tx and so naturally it was very close to the model and secondly on the third flight I was doing a lot of rolling and snapping manoevres and since the model is doing about 2 snaps per seconds it is rolling really rapidly so maybe thats the cause of the high counts.
In any case, during the 4 flights at no time did I not feel as though I didnt have control so I will continue to fly it, monitoring the counts for my own curiosity.
When I get home tonight I will pull one of the external aerials out to ascertain which is left and right as I am very interested to see if the R aerial is the one at the back of the model in the fin as mentioned by Dave Presta.
Dave W - I think you might be right and we simply don't have this level of info with standard 35 Mhz Rx's(apart from the weatronics/ACT etc).
Thanks again for the replies
Geoff.
Thanks for all the responses, really appreciated.
Two things of interest. Firstly, when starting the model I was holding the Tx and so naturally it was very close to the model and secondly on the third flight I was doing a lot of rolling and snapping manoevres and since the model is doing about 2 snaps per seconds it is rolling really rapidly so maybe thats the cause of the high counts.
In any case, during the 4 flights at no time did I not feel as though I didnt have control so I will continue to fly it, monitoring the counts for my own curiosity.
When I get home tonight I will pull one of the external aerials out to ascertain which is left and right as I am very interested to see if the R aerial is the one at the back of the model in the fin as mentioned by Dave Presta.
Dave W - I think you might be right and we simply don't have this level of info with standard 35 Mhz Rx's(apart from the weatronics/ACT etc).
Thanks again for the replies
Geoff.
11-26-2007 | 04:31 AM
#10
RE: Question Ref Spektrum fades/frames figs.
G
Have you looked at the carbon situation around the fin? I'm sure it will be the fin mounted Rx that is giving the high numbers.
It would be interesting to know the temperature range on the sub aerials...must be warm in the fin
Dw
Have you looked at the carbon situation around the fin? I'm sure it will be the fin mounted Rx that is giving the high numbers.
It would be interesting to know the temperature range on the sub aerials...must be warm in the fin
Dw
11-26-2007 | 04:50 AM
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From: Oxford, UNITED KINGDOM
RE: Question Ref Spektrum fades/frames figs.
Hi Dave,
Must admit never thought about the heat situation when I put the RX at the top of the fin.
Mmmm.Maybe one of the Horizon reps could offer some advice here?
Geoff.
Must admit never thought about the heat situation when I put the RX at the top of the fin.
Mmmm.Maybe one of the Horizon reps could offer some advice here?
Geoff.
11-26-2007 | 06:55 AM
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From: Oxford, UNITED KINGDOM
RE: Question Ref Spektrum fades/frames figs.
On another fourm there is a ref to him giving a talk at BMFA AGM where he laid to rest some of the myths you hear. In addition he apparently talked about some of up and coming improvements. It would be great if you could ask him to re-iterate this info so you coudl post it here.
Geoff.
Geoff.
11-26-2007 | 07:02 AM
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From: Coventrynot applicable, UNITED KINGDOM
RE: Question Ref Spektrum fades/frames figs.
ORIGINAL: Geoff White
Hi,
I have flown my Flash on 2.4Ghz today for the first time. I had 4 flights and it worked perfectly, however when I look at the data ref the number of fades/frame losses after each flight I am slightly concerned. Here are the results.
Flight 1- A 40,B 72, L 64, R 244, F 0, H 0
Flight 2 - A 141,B 136, L 69, R 234, F 0,H 0
Flight 3 - A 255, B 253, L 555, R 801, F 46, H 0
Flight 4 - A 65, B 39, L 58, R 186, F 0, H 0
Done a bit of research on previous threads and the figures look OK, apart from flight 3 which looks a bit odd. As there are people on RCU who are far more experienced then me with using spektrum, can anyone offer any advice. Are the figures OK? Have I anything to worry about?
Also, I am sure it has been asked before but the L and R figures refer to Left and right external antenna's. How do I know which is left and right?
I also thought it might help posting a picture of the installation. Note the second remote receiver is at the rear of the plane in the fin.
Thanks.
Geoff.
Hi,
I have flown my Flash on 2.4Ghz today for the first time. I had 4 flights and it worked perfectly, however when I look at the data ref the number of fades/frame losses after each flight I am slightly concerned. Here are the results.
Flight 1- A 40,B 72, L 64, R 244, F 0, H 0
Flight 2 - A 141,B 136, L 69, R 234, F 0,H 0
Flight 3 - A 255, B 253, L 555, R 801, F 46, H 0
Flight 4 - A 65, B 39, L 58, R 186, F 0, H 0
Done a bit of research on previous threads and the figures look OK, apart from flight 3 which looks a bit odd. As there are people on RCU who are far more experienced then me with using spektrum, can anyone offer any advice. Are the figures OK? Have I anything to worry about?
Also, I am sure it has been asked before but the L and R figures refer to Left and right external antenna's. How do I know which is left and right?
I also thought it might help posting a picture of the installation. Note the second remote receiver is at the rear of the plane in the fin.
Thanks.
Geoff.
11-26-2007 | 08:26 AM
#18
RE: Question Ref Spektrum fades/frames figs.
G
OK Paul says 85 degrees C max
He also says that the tail pipe will cause a lot of reflection. Basically he says take the remote out of the fin and put it in the wing.
There is a new Rx coming for large models and jets...
Dw
OK Paul says 85 degrees C max
He also says that the tail pipe will cause a lot of reflection. Basically he says take the remote out of the fin and put it in the wing.
There is a new Rx coming for large models and jets...
Dw
11-26-2007 | 08:34 AM
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From: Oxford, UNITED KINGDOM
RE: Question Ref Spektrum fades/frames figs.
Thanks for that Dave,
Funnily enough, I was chatting to Dick after flying yesterday and he said that maybe its the tailpipe causing issues with the rear RX. If, as we suspect, it is the rear one that has the high count then I will definately move it as suggested.
Any details(timescales?) on the new RX? What makes it more suitable for jets and large models?
Geoff.
Funnily enough, I was chatting to Dick after flying yesterday and he said that maybe its the tailpipe causing issues with the rear RX. If, as we suspect, it is the rear one that has the high count then I will definately move it as suggested.
Any details(timescales?) on the new RX? What makes it more suitable for jets and large models?
Geoff.
11-26-2007 | 10:08 AM
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RE: Question Ref Spektrum fades/frames figs.
Hello Geoff..........the only problem I've had with the spectrum system has to do with the antenna connection on the back of the transmitter module.....the connection has to be snug tight......but it is very easy to slightly bump the protruding connection and loosen it.........a slight loosening caused my reciever to go into hold.....the system recovered and the plane was landed safely............upon range checking after landing the "only slight loose connection" was found and normal range was restored by snuging up the connection..
needless to say , now on my pre-takeoff roll i double check the antenna connection for tightness
David C
needless to say , now on my pre-takeoff roll i double check the antenna connection for tightness
David C
11-26-2007 | 10:26 AM
#22
RE: Question Ref Spektrum fades/frames figs.
hi guys,
does anybody know where I can get a [ mike reeves] reaper jet, a kit or already built there was one on RCU a couple of months ago,
it was built but uncovered I thought I save his AD my computer but I didn't........................... thanks
does anybody know where I can get a [ mike reeves] reaper jet, a kit or already built there was one on RCU a couple of months ago,
it was built but uncovered I thought I save his AD my computer but I didn't........................... thanks
11-26-2007 | 12:15 PM
#23
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RE: Question Ref Spektrum fades/frames figs.
Two Dogs,
The back of the tx case needs to be protected imo. I ended up putting my tx back into the tray i was using before i switched to 2.4. Every time you place the tx down on the bench it is resting on that coax connection and it ends up loose.With the tx fastened in a tray (i cut a hole out for the coax fitting) there is no stress on the 2.4 module now at all and i don`t expect it to get loose any time soon.
V..
The back of the tx case needs to be protected imo. I ended up putting my tx back into the tray i was using before i switched to 2.4. Every time you place the tx down on the bench it is resting on that coax connection and it ends up loose.With the tx fastened in a tray (i cut a hole out for the coax fitting) there is no stress on the 2.4 module now at all and i don`t expect it to get loose any time soon.
V..
11-26-2007 | 03:09 PM
#24
RE: Question Ref Spektrum fades/frames figs.
Hi Geoff, I have been flying two models over the last three days with Spektrum AR9000 receivers with twin remotes. Again my BobCat was perfect with not a single frame lost. On one flight A +B receivers both had under 20 fades and L + R under 10 ! The very next flight A +B had almost 200 fades and L+R almost 100 each, still no frames lost and no hold. Rock solid and stil not a single frame lost in 25 flights to date !
I also flew my Savex L39 . I was a bit concernerned with this small model with all the equipment in such a small space. I put one remote Rx in the wing as a precaution. Results amazing, Fades are VERY low in ALL receivers, (under 10 for ALL receivers on one flight) no holds and only 4 frames lost and that probably as a result of walking around the other pilots in the box and blocking the signal after landing.
This is working to perfection for me, amazing stuff.
All we need now is 12 channels, or more, and data acquisition and programming as extensive as the Weatronics !
Regards, David Gladwin.
I also flew my Savex L39 . I was a bit concernerned with this small model with all the equipment in such a small space. I put one remote Rx in the wing as a precaution. Results amazing, Fades are VERY low in ALL receivers, (under 10 for ALL receivers on one flight) no holds and only 4 frames lost and that probably as a result of walking around the other pilots in the box and blocking the signal after landing.
This is working to perfection for me, amazing stuff.
All we need now is 12 channels, or more, and data acquisition and programming as extensive as the Weatronics !
Regards, David Gladwin.
11-26-2007 | 04:16 PM
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From: Oxford, UNITED KINGDOM
RE: Question Ref Spektrum fades/frames figs.
All,
Well, just checked and the right external RX is indeed the one in the top of the fin so as advised I will reposition it.
Dave G. - Glad to hear its all working OK. I have only had 4 flights and only the 3rd showed some high figures. So I am going to carry on flying as maybe it was just an anamoly. Again to repeat I felt no issue while flying the flash.
Just a matter of interest I am sure there are some people out there flying a Flash on 2.4Ghz. Assuming you are using 2 external RX's, where did you put them?
Thanks again.
Geoff.
Well, just checked and the right external RX is indeed the one in the top of the fin so as advised I will reposition it.
Dave G. - Glad to hear its all working OK. I have only had 4 flights and only the 3rd showed some high figures. So I am going to carry on flying as maybe it was just an anamoly. Again to repeat I felt no issue while flying the flash.
Just a matter of interest I am sure there are some people out there flying a Flash on 2.4Ghz. Assuming you are using 2 external RX's, where did you put them?
Thanks again.
Geoff.
