Carsten Products and Ultimate Jets
#26
My Feedback: (2)
1) Am I mis-reading the display in the video, or do the bar graphs not match the digital RPM readouts (either actual or commanded) ?
At what I assume is 99% on the digital readout, the bar graph indicates approx 60%. In fact, the two displays don't seem to match up at any point during the run?
2) Is the fuel flow still implied from pump voltage rather than something more direct? Perhaps newer JetCat ECUs are more accurate, but I found the version 5.0 fuel used calculations to be very inaccurate and haven't given it a look since.
Thanks,
Don
At what I assume is 99% on the digital readout, the bar graph indicates approx 60%. In fact, the two displays don't seem to match up at any point during the run?
2) Is the fuel flow still implied from pump voltage rather than something more direct? Perhaps newer JetCat ECUs are more accurate, but I found the version 5.0 fuel used calculations to be very inaccurate and haven't given it a look since.
Thanks,
Don
#27
Don,
I know the video is far from perfect and it is a little hard to see the numbers etc (I assume it is the one Oli links to at the bottom of his page).
The way it works is that the RPM bargraph is scaled according to the max RPM the engine is set to (set via the GSU/ECU). I use this number (f.ex 150.000 RPM) as the full "deflection" of the bargraph (100%). The RPM read from the ECU is then shown on the bargraph as well as a written value below the graph (so 75000 RPM would mean the bargraph would be at 50%). The THR to the right of the RPM bargraph has 100% throttle as the max in the bargraph. 0% is idle
The fuel flow seems to be pretty accurate on the V6 and V10 ECUs we have been testing on (P100RX's, P160SX, P180RX, P300RX, SPT10 and SPT15). It is of course not anywhere near 1% or so, JetCat claims 5 to 10% and this seems to match well what we have seen here
Hope this makes sense ?
I know the video is far from perfect and it is a little hard to see the numbers etc (I assume it is the one Oli links to at the bottom of his page).
The way it works is that the RPM bargraph is scaled according to the max RPM the engine is set to (set via the GSU/ECU). I use this number (f.ex 150.000 RPM) as the full "deflection" of the bargraph (100%). The RPM read from the ECU is then shown on the bargraph as well as a written value below the graph (so 75000 RPM would mean the bargraph would be at 50%). The THR to the right of the RPM bargraph has 100% throttle as the max in the bargraph. 0% is idle
The fuel flow seems to be pretty accurate on the V6 and V10 ECUs we have been testing on (P100RX's, P160SX, P180RX, P300RX, SPT10 and SPT15). It is of course not anywhere near 1% or so, JetCat claims 5 to 10% and this seems to match well what we have seen here
Hope this makes sense ?
#28
My Feedback: (2)
Thanks Carsten, your explanation makes perfect sense. I'd just say though that an arbitrary figure for max RPM, if chosen by someone other than the end user and/or not matching the actual limitations of the particular engine, limit the usefulness of the bar graph. Of course, if that parameter is user adjustable then my observation is moot.
#29
The max RPM used to scale the bargraph is the one that is set in the ECU by the user (normally not touched so just the value set for the engine by the factory)
I have applied the same principle to the "fuel left in tank", the max bargraph value is the tank volume from the ECU which is also set by the user.
I have applied the same principle to the "fuel left in tank", the max bargraph value is the tank volume from the ECU which is also set by the user.
#31
My Feedback: (4)
I've decided to only purchase one CANLCD and use it as a "GSU". The display is connected to the airframe with a Modular RJ11 plug. JC is using RJ12, Xicoy v.6 a RJ45 and Xicoy v.10 a servo connector. i.e. preventing myself from any mix-ups.
To further prevent any problems, I've soldered a male servo connector to the JC i/o board (special polarity, check the very comprehensive manual). Now I can connect the ASSI to the i/o board with any std female/female servo lead without giving it any x-tra consideration. (KISS)
Thomas
To further prevent any problems, I've soldered a male servo connector to the JC i/o board (special polarity, check the very comprehensive manual). Now I can connect the ASSI to the i/o board with any std female/female servo lead without giving it any x-tra consideration. (KISS)
Thomas
#32
Thread Starter
I've decided to only purchase one CANLCD and use it as a "GSU". The display is connected to the airframe with a Modular RJ11 plug. JC is using RJ12, Xicoy v.6 a RJ45 and Xicoy v.10 a servo connector. i.e. preventing myself from any mix-ups.
To further prevent any problems, I've soldered a male servo connector to the JC i/o board (special polarity, check the very comprehensive manual). Now I can connect the ASSI to the i/o board with any std female/female servo lead without giving it any x-tra consideration. (KISS)
Thomas
To further prevent any problems, I've soldered a male servo connector to the JC i/o board (special polarity, check the very comprehensive manual). Now I can connect the ASSI to the i/o board with any std female/female servo lead without giving it any x-tra consideration. (KISS)
Thomas
That makes a much nicer GSU display. The oiginal GSU would still need to be carried in the field box in case one wants to change some ECU parameter...
#34
Thread Starter
Here is the ASSI box.
This CAD is for 3D printing.
The box will be 26 USD.
I'll get a prototype in the next few days to validated the design and then will start production.
http://www.ultimate-jets.net/collect...ssi-device-box
This CAD is for 3D printing.
The box will be 26 USD.
I'll get a prototype in the next few days to validated the design and then will start production.
http://www.ultimate-jets.net/collect...ssi-device-box
#36
Thread Starter
#37
Thread Starter
For our customers who received the products, please bear in mind that the latest updated user manual is available form the download section of the product page for both the ASSI and CAN LCD devices.
http://www.ultimate-jets.net/collections/assi-telemetry
I am expecting to receiving the first box prototype next week. I'll post pictures of this along with some more news.
http://www.ultimate-jets.net/collections/assi-telemetry
I am expecting to receiving the first box prototype next week. I'll post pictures of this along with some more news.
#38
Thread Starter
In the frame of our cooperation with Carsten, we'd like to announce the development of a new line of sensors.
The first of them will be the pressure sensor, which is specifically designed to send a telemetry feedback on the pressure available in your pneumatic tank.
The sensor board is quite small ( about 1 square inch ) and will feature a barbed fitting that allow the use of our top quality 100% USA manufactured pneumatic line:
http://www.ultimate-jets.net/collect...pneumatic-line
Up to 4 devices can be chained on the Futaba SBUS system ( port 1 to 4 ).
The devices can also be used in conjunction with the ASSI board by being plugged on the CAN bus.
If you do not have Futaba telemetry or an ASSI board, you can also use these sensors in conjunction with our CAN LCD device and get the pressure readout from inside the plane on the beautifully crisp color LCD screen.
We will come with other sensor boards in the future: proximity sensor, angular sensor, AOA sensor...
The first of them will be the pressure sensor, which is specifically designed to send a telemetry feedback on the pressure available in your pneumatic tank.
The sensor board is quite small ( about 1 square inch ) and will feature a barbed fitting that allow the use of our top quality 100% USA manufactured pneumatic line:
http://www.ultimate-jets.net/collect...pneumatic-line
Up to 4 devices can be chained on the Futaba SBUS system ( port 1 to 4 ).
The devices can also be used in conjunction with the ASSI board by being plugged on the CAN bus.
If you do not have Futaba telemetry or an ASSI board, you can also use these sensors in conjunction with our CAN LCD device and get the pressure readout from inside the plane on the beautifully crisp color LCD screen.
We will come with other sensor boards in the future: proximity sensor, angular sensor, AOA sensor...
#39
Thread Starter
We just received the first prototype of the 3D printed ASSI box.
CAD designing this took me 20 minutes, then it took 2 months to get the physical unit!
I am buying a 3D printer right now and we will produce lots of new thing in-house soon.
Anyway here are a few pictures.
The open box without the board.
The top cover with the board fitted viewed from the CAN bus/ SBSUs 2 connectors.
The pressure port view.
The ECU connectors view.
The box closed with a view on the Philips countersink screws.
The pneumatic tubes are slightly pushing on the box bottom. I need to make a small recess to cater for this.
CAD designing this took me 20 minutes, then it took 2 months to get the physical unit!
I am buying a 3D printer right now and we will produce lots of new thing in-house soon.
Anyway here are a few pictures.
The open box without the board.
The top cover with the board fitted viewed from the CAN bus/ SBSUs 2 connectors.
The pressure port view.
The ECU connectors view.
The box closed with a view on the Philips countersink screws.
The pneumatic tubes are slightly pushing on the box bottom. I need to make a small recess to cater for this.
#41
Oli, if your using 18MZ Sbus can you get the fuel remaining with a Xicony or is it just for the Jetcats? The way its listed for jetcat/Xicony/Sbus confused me a little, Thanks
#42
Thread Starter
Yes, Fender. Fuel quantity is available on most Xicoy ECU versions, thus readable on the ASSI version. Just check that you can configure this in the setup menu of your ECU.