New turbine X 45 ,by Gaspar
11-15-2019, 06:24 AM
#130
here's an answer from Wiki
https://en.wikipedia.org/wiki/FADEC
Regarding Q9,
Personal preference.
I have used several ways. I started by using the trim, which takes a couple of seconds to run. KISS. Then changed to a 2 position switch which is instant, but was worried that knocking it by accident in flight would be an instant deadstick.
I recently found a better way. On my Taranis Tx which has voice, I use switch SG, a 3-position switch.
I leave the throttle trim full up. I set TWO positions of the switch to RUN and the third to STOP.
I use the two end positions for switching on and off the engine, and I set the voice to tell me "throttle active" or "throttle disabled" in each position. If I accidentally move the switch to the middle position I get the "throttle active" voice warning which prompts me to put it back to the RUN end position. I have to move it twice, deliberately, with a voice warning half way, to shut down the engine.
On a Tx with sound I can recommend this system.
https://en.wikipedia.org/wiki/FADEC
Regarding Q9,
Personal preference.
I have used several ways. I started by using the trim, which takes a couple of seconds to run. KISS. Then changed to a 2 position switch which is instant, but was worried that knocking it by accident in flight would be an instant deadstick.
I recently found a better way. On my Taranis Tx which has voice, I use switch SG, a 3-position switch.
I leave the throttle trim full up. I set TWO positions of the switch to RUN and the third to STOP.
I use the two end positions for switching on and off the engine, and I set the voice to tell me "throttle active" or "throttle disabled" in each position. If I accidentally move the switch to the middle position I get the "throttle active" voice warning which prompts me to put it back to the RUN end position. I have to move it twice, deliberately, with a voice warning half way, to shut down the engine.
On a Tx with sound I can recommend this system.
I am always interested to see how other guys do things , so:
Can you tell me what advantage your method has over the tried and tested system of using the throttle trim to enable start and define idle.
As I see it has none of the disadvantages of your system in that it is incredibly simple, cannot be accidentally knocked off, depend on an aural warning which could be drowned out, and requires more actions and is the method recommended by all the engine manufacturers of which I have first hand experience.
My transmitters are 12x , 28 x, Bat 60 and Core, all using the throttle trim method.
Just curious !
11-15-2019, 03:51 PM
#132
Hi Alisdair,
I am always interested to see how other guys do things , so:
Can you tell me what advantage your method has over the tried and tested system of using the throttle trim to enable start and define idle.
As I see it has none of the disadvantages of your system in that it is incredibly simple, cannot be accidentally knocked off, depend on an aural warning which could be drowned out, and requires more actions and is the method recommended by all the engine manufacturers of which I have first hand experience.
My transmitters are 12x , 28 x, Bat 60 and Core, all using the throttle trim method.
Just curious !
I am always interested to see how other guys do things , so:
Can you tell me what advantage your method has over the tried and tested system of using the throttle trim to enable start and define idle.
As I see it has none of the disadvantages of your system in that it is incredibly simple, cannot be accidentally knocked off, depend on an aural warning which could be drowned out, and requires more actions and is the method recommended by all the engine manufacturers of which I have first hand experience.
My transmitters are 12x , 28 x, Bat 60 and Core, all using the throttle trim method.
Just curious !
I haven't run my X45 yet but:-
Yes, the trim works just fine. I preferred a manual trim to the automatic one now universal.
The standard default is a 2-pos switch, which I tried, but worried about hitting it accidentally.
The clincher on Taranis was the voice warning, and with a centre safe position it had an element of 'fail-safe'.
The digital trim takes a couple of seconds to run. I still use it on some Tx (Spek DX7S) but prefer the Taranis setup. Try it, if your Tx has a voice!
Oh and for Ray, I'm sure my cutoff switch does bring on the cool-down cycle.
11-16-2019, 05:36 AM
#133
My Feedback: (48)
"The digital trim takes a couple of seconds to run."
My DX18 has a "Trim Step" feature that allows the throttle trim to go all the way from off to run position in one or two steps. This eliminates the concerns stated above and is how I have all of my turbines set up.
Can't you do that with a Taranis?
My DX18 has a "Trim Step" feature that allows the throttle trim to go all the way from off to run position in one or two steps. This eliminates the concerns stated above and is how I have all of my turbines set up.
Can't you do that with a Taranis?
11-16-2019, 06:01 AM
#134
Hi David,
I haven't run my X45 yet but:-
Yes, the trim works just fine. I preferred a manual trim to the automatic one now universal.
The standard default is a 2-pos switch, which I tried, but worried about hitting it accidentally.
The clincher on Taranis was the voice warning, and with a centre safe position it had an element of 'fail-safe'.
The digital trim takes a couple of seconds to run. I still use it on some Tx (Spek DX7S) but prefer the Taranis setup. Try it, if your Tx has a voice!
Oh and for Ray, I'm sure my cutoff switch does bring on the cool-down cycle.
I haven't run my X45 yet but:-
Yes, the trim works just fine. I preferred a manual trim to the automatic one now universal.
The standard default is a 2-pos switch, which I tried, but worried about hitting it accidentally.
The clincher on Taranis was the voice warning, and with a centre safe position it had an element of 'fail-safe'.
The digital trim takes a couple of seconds to run. I still use it on some Tx (Spek DX7S) but prefer the Taranis setup. Try it, if your Tx has a voice!
Oh and for Ray, I'm sure my cutoff switch does bring on the cool-down cycle.
I think I see it now, your trims are slow electronic, whereas mine are mechanical , 12x, or have one or two step electronic devices, 28x, Core and BAT 60, which makes the trim system so easy and reliable.
Anyway, whatever system you use, enjoy your X 45, it is a truly delightful engine which will amaze you with its amazingly easy operation and its exceptionally short start cycle. ! Its brilliant.
David.
Last edited by David Gladwin; 11-16-2019 at 08:22 AM.
11-26-2019, 12:53 PM
#138
X 45
I assume from this post you had airframe failure using EDF .
I would caution anyone using an X 45 in a foamie, indeed any airframe, NOT to underestimate this engine, tiny though it is.
Although it produces 10 pounds of static thrust I get the impression after flying it and seeing the very high speed achieved on Jason’s model, a Mini Wizard, that thrust decay with speed is relatively low suggesting, just suggesting, to me that it has a higher than average exhaust velocity.
Last edited by David Gladwin; 11-26-2019 at 12:56 PM.
12-22-2019, 07:11 PM
#139
Join Date: Nov 2006
Location: USA, USA
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I have been flying the "Viper" (but it is an Avanti ..awesome design by Sebastiano S.) .. fine tunning some issues...
As the pump goes through the break-in, it now moves my plane, while on idle...while it didn't do that for the last 5 weeks (no parameters were changed in the pump PW or idle RPM) ...
While I was trying to slow it down a bit I decided to try lowering the top thrust ... to 35N and ...it flew the big plane just fine ! I used to fly .60 pattern style back in the 70's ... this combo was a nice surprise about that !
The idea of lowering the top end thrust ( to 35N) was to also lower the idle thrust ,, but it seems not to work that way.... so now I have to apply brakes on idle, while for about 6 weeks I did not have to .... any ideas out there?
As the pump goes through the break-in, it now moves my plane, while on idle...while it didn't do that for the last 5 weeks (no parameters were changed in the pump PW or idle RPM) ...
While I was trying to slow it down a bit I decided to try lowering the top thrust ... to 35N and ...it flew the big plane just fine ! I used to fly .60 pattern style back in the 70's ... this combo was a nice surprise about that !
The idea of lowering the top end thrust ( to 35N) was to also lower the idle thrust ,, but it seems not to work that way.... so now I have to apply brakes on idle, while for about 6 weeks I did not have to .... any ideas out there?
12-22-2019, 10:53 PM
#140
Member
i could imagine that the weather is the reason for your need of applying brakes - in case it gets colder your turbine can do much higher thrust due to increassd oxygen content in the air
if you check manufacturers data on thrust, you will find those which do it at lets say 20C and 1030 mbar and others like JetCat (if I remember well) will quote power at lower temperatures e.g 15C but nominal pressure
Don’t know your weather conditions but is the most obvious parameter which keeps changing over time - in summer it will be the other way round
12-22-2019, 11:13 PM
#141
Join Date: Jun 2002
Location: Arenys de Munt- BARCELONA, SPAIN
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I have been flying the "Viper" (but it is an Avanti ..awesome design by Sebastiano S.) .. fine tunning some issues...
As the pump goes through the break-in, it now moves my plane, while on idle...while it didn't do that for the last 5 weeks (no parameters were changed in the pump PW or idle RPM) ...
While I was trying to slow it down a bit I decided to try lowering the top thrust ... to 35N and ...it flew the big plane just fine ! I used to fly .60 pattern style back in the 70's ... this combo was a nice surprise about that !
The idea of lowering the top end thrust ( to 35N) was to also lower the idle thrust ,, but it seems not to work that way.... so now I have to apply brakes on idle, while for about 6 weeks I did not have to .... any ideas out there?
As the pump goes through the break-in, it now moves my plane, while on idle...while it didn't do that for the last 5 weeks (no parameters were changed in the pump PW or idle RPM) ...
While I was trying to slow it down a bit I decided to try lowering the top thrust ... to 35N and ...it flew the big plane just fine ! I used to fly .60 pattern style back in the 70's ... this combo was a nice surprise about that !
The idea of lowering the top end thrust ( to 35N) was to also lower the idle thrust ,, but it seems not to work that way.... so now I have to apply brakes on idle, while for about 6 weeks I did not have to .... any ideas out there?
Gaspar
12-25-2019, 09:05 AM
#142
Join Date: Nov 2006
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I have been checking the weather data for the month and as it shows, we have had double the humidity levels lately, as the winter sets in. Higher DA ("density air").
I got some other jets ( with Wren 44, M70, K60, K70, K85, Wren100, JC100 rabbit, K120, K170) that would not do that... but that is comparing apples to onions... my converted plane weights shy below 10# wet....
even idle thurst pushes the plane around when low on fuel...I thought I would never hear these words in the same sentence; my jet is too light ! V-1 HSD EDF viper.. made of EPP foam, way before they went into the totally heavier Q- EPO and the later the even denser -aerofoam-.
I got some other jets ( with Wren 44, M70, K60, K70, K85, Wren100, JC100 rabbit, K120, K170) that would not do that... but that is comparing apples to onions... my converted plane weights shy below 10# wet....
even idle thurst pushes the plane around when low on fuel...I thought I would never hear these words in the same sentence; my jet is too light ! V-1 HSD EDF viper.. made of EPP foam, way before they went into the totally heavier Q- EPO and the later the even denser -aerofoam-.
12-25-2019, 09:38 AM
#143
Member
I didn’t check your location tbh - Tucson humidity is probably still low even when you say that humidity level has doubled;-))
looked at temperatures of November vs December 2019 and they are significantly lower (my normal „good“ weather in case it’s not winter) but probably cold for you......the combustion should be way more effective below 20 Celsius imho
here in Europe people often refer to summer temps like your average oct/nov temperatures as hot and that turbines show less power
in total.
when flying nitro helis or driving motorcycle I also knew it from the very beginning how much oxygen is available for combustion......my little jets are overpowered like yours so probably won’t notice...but here summer was extremely hot for our case and there wasn’t much flying going on....
anyway, enjoy the Viper (I fly a Taft Viper) and the much better weather
happy holidays
markus
looked at temperatures of November vs December 2019 and they are significantly lower (my normal „good“ weather in case it’s not winter) but probably cold for you......the combustion should be way more effective below 20 Celsius imho
here in Europe people often refer to summer temps like your average oct/nov temperatures as hot and that turbines show less power
in total.
when flying nitro helis or driving motorcycle I also knew it from the very beginning how much oxygen is available for combustion......my little jets are overpowered like yours so probably won’t notice...but here summer was extremely hot for our case and there wasn’t much flying going on....
anyway, enjoy the Viper (I fly a Taft Viper) and the much better weather
happy holidays
markus
Last edited by drfred58809; 12-25-2019 at 10:16 AM.
12-26-2019, 01:12 AM
#144
What gives more thrust is colder air and higher air pressure !
Just had my X45 returned from Gaspar after its inspection after a severe mid air, the little gem appears to have survived intact and undamaged.
Great service from Gaspar, again!
Last edited by David Gladwin; 12-26-2019 at 01:14 AM.
12-29-2019, 12:33 AM
#146
Top connector is pump. The original board had only one, Gaspar has just sent me the new version with 2 plugs, not sure what the lower one is for !
01-06-2020, 08:16 AM
#150
My Feedback: (1)
I just noticed my question did not come through on my previous post.
I am having trouble with Spektrum Telemetry. My receiver recognizes there is telemetry attached and it appears to be set up on the ECU however I don't get any turbine data back to the transmitter. I did the advanced setup and saved the settings. One from the latest firmware on my transmitter (does have turbine instead of Jetcat) and not sure what version on the receiver. Any suggestions of what to try next?
I am having trouble with Spektrum Telemetry. My receiver recognizes there is telemetry attached and it appears to be set up on the ECU however I don't get any turbine data back to the transmitter. I did the advanced setup and saved the settings. One from the latest firmware on my transmitter (does have turbine instead of Jetcat) and not sure what version on the receiver. Any suggestions of what to try next?