JR-9303 2.4 Field Results

[Pale Rider]

Been fooling with my new 9303 for a while and did some range testing today. With the motor off and the bind button depressed I could go 240' walking from the right side of the plane---258' walking from the left--288' from the nose--300' from the tail.

Not much difference with the motor running...225' from the right---249' from the left--249 from the left--288' from the nose and 300' from the tail.

Fail-safe was set to kill the throttle so thats when I stopped walking

Fades were all less than 50 on all rx's and only 1 frame loss--no holds.

At full power I stopped walking at 400'--figured that was far enough

[bodywerks]

If your engine shut off as a result of a failsafe, wouldn't that have been a hold?

[Pale Rider]

	Quote: Originally Posted by bodywerks
	If your engine shut off as a result of a failsafe, wouldn't that have been a hold?

Yea I guess--I was basically just trying to see the maximum range and compare it to the engine-off test.

[ripper-911]

	Quote: Originally Posted by Pale Rider
	Than ks Razor! I didnt want to hijack your other thread anymore than I did! That pretty much sells me on the 9303..I have a 9C now but it only has triple rates--which is basically only 3 rates for each surface...since Im going 2.4 I wanted to be sure the 9303 would give me 3 rates on each mode---9 sets alltogether..

Hi Pale. I have a 9C and I have 3 rates programmed for each of the 3 positions of the upper right 3 position switch giving a total of 9 rates.

Regards,

Robert

[Edge540 Freak]

After ordering it in October, my JR 9303 2.4Ghz comes tomorrow...I'm am stoked to say the least!!!!!!!

[Eflyer_75214]

Has anyone contacted JR or Horizon to see if there are plans to add timming to the data that is displayed on the Data Logger? That would make the data much more meaningful.

Not into Giant's, but very interested in the X9303 and have enjoyed the info being posted here, especially the data from Data Loggers. Would be helpful if somone from JR would pop in now and then to bless some of the info and help sort things out a little.

Regards,

Ron

[chris202518]

i bought this radio out in october and i love it no problems evrything smooth and working perfect

[GooseF22]

Since this forum is the most comprehensive..... read the following from spektrum

Recommended Guidelines

Receiver Power System Requirements

With all radio installations it is vital the onboard power system provides adequate power of 4.5 volts or more without interruption to the receiver even when the system is fully loaded (servos at maximum flight loads). This becomes especially critical with giant scale models that utilize multiple high torque/ high current servos. Inadequate power systems that are unable to provide the necessary minimum voltage to the receiver during flight loads have become the number one cause of in flight failures. Some of the power system components that affect the ability to properly deliver adequate power include: the selected receiver battery pack (number of cells, capacity, cell type, state of charge), switch harness, battery leads, regulator (if used), power bus (if used).

While Spektrum’s receivers’ minimum operational voltage is 3.5 volts, it is highly recommended the system be tested per the guidelines below to a minimum acceptable voltage of 4.8 volts during ground testing. This will provide head room to compensate for battery discharging or if the actual flight loads are greater than the ground test loads.

Recommended power system guidelines:

1. When setting up large or complex aircraft with multiple high torque servos, it’s highly recommend a current and volt meter (Hangar 9 HAN172) be used. Plug the volt meter in an open channel port in the receiver and with the system on, load the control surfaces (apply pressure with your hand) while monitoring the voltage at the receiver. The voltage should remain above 4.5 volts even when all servos are heavily loaded.

2. With the current meter inline with the receiver battery lead, load the control surfaces (apply pressure with your hand) while monitoring the current. The maximum continuous recommended current for a single heavy duty servo/battery lead is three amps while short duration current spikes of up to five amps is acceptable. Consequently if your system draws more than three amps continuous or five amps for short durations, a single battery pack with a single switch harness plugged into the receiver for power will be inadequate. It will be necessary to use multiple packs with multiple switches and multiple leads plugged into the receiver.

3. If using a regulator it’s important the above tests be done for an extended period of 5 minutes. When current passes through a regulator heat is generated and this heat causes the regulator to increase resistance which in turn causes even more heat to build up (thermal runaway). While a regulator may provide adequate power for a short duration it’s important to test its ability over time as the regulator may not be able to maintain voltage at significant power levels.

4. For really large aircraft or complex models (35% and larger or jets) multiple battery packs with multiple switch harnesses are necessary or in many cases one of the commercially available power boxes/ busses is recommended. No matter what power systems you choose always carry out test #1 above making sure that the receiver is constantly provided with 4 volts or more under all conditions.

5. The latest generation of Nickel Metal Hydride batteries incorporate a new chemistry mandated to be more environmentally friendly. These batteries when charged with peak detection fast chargers have tendencies to false peak (not fully charge) repeatedly. These include all brands of NiMh batteries. If using NiMh packs be especially cautious when charging making absolutely sure that the battery is fully charged. It is recommended to use a charger that can display total charge current. Note the number of mAh put into a discharged pack to verify it has been charged to capacity.

[1bwana1]

Thanks Goose, that is very useful, and a little scary information. Setting up a proper power system for the Spektrum stuff takes some serious thought. Although, we can test on the ground all we want, it looks like some sort of system that monitors things in the air like the flight log is needed. This power issue is greatly exacerbated by the need for the current receivers to scan the band to re-establish a connection with the TX. This of course is being addressed in the upcoming RXs like the 9100. I think I'll wait to put it in my giant scale planes.

[Pale Rider]

I just put a few more flights in with my 9303 and so far the most any rx measured was 8 fades. Im feeling pretty confident in the system now that I have some time on it. Now that Im getting used to the new Tx (Ive been using a 9C for a few years) I can definitely feel the faster response time. I had to dial in a little more expo but so far I like the 9303. Very easy to program.

[ricoalonso]

Edit: After a few days of reading this whole thread from start to finish, I finally got a little bit more educated with the terms and found the answer to my question.

I think JR X9303 is the way for me to go if ever I finally decide to get rid of my Futaba 9Z WC2 and transition to 2.4GHz system.

Thanks for all the valuable informations in this thread.
^R^

[GooseF22]

	Quote: Originally Posted by ricoalonso
	Edit: After a few days of reading this whole thread from start to finish, I finally got a little bit more educated with the terms and found the answer to my question. I think JR X9303 is the way for me to go if ever I finally decide to get rid of my Futaba 9Z WC2 and transition to 2.4GHz system. Thanks for all the valuable informations in this thread. ^R^

If you still like that radio you can buy the module and transition slowly by buying receivers, and when you finally decide to get 9x or 12x JR, you wont have anything else to buy. then sell the 9C with the module or give it to your wife to support your habit....you know kinda like the shotgun thing.....

[ricoalonso]

GooseF22,
Thanks for the great idea. I actually thought about getting the module for my 9Z (not 9C). However, I read once in another forum that someone from Germany (?) had servo glitching when he used the Spektrum 2.4GHz module on his 9Z Tx. The same thing happened for others with 9Z but with XPS module. And, from all these observations it was said that the 9Z is sending erratic PPM pulse. I could wait for the FASST module but with their high-priced receivers I think it's just too much for parkflyer-size models. So, I think it's about time for me to switch brand when I decide to go 2.4GHz.

[Zeeb]

ricolanso,

I also had some reservations about switching brands as I'd been flying a 9Z WC2 radio. But when I saw Futaba's implementation of the 2.4 system (modules) I thought it was pretty tacky and would be prone to damage on the tx antennas. While they claim there is no performance degredation with using a module system, I have my doubts.

Roll into that the rather uneven and generally not helpful support I got from Futaba and I'd just had enough to push me to changing brands.

I first bought a DX-7 to play with before the X9303 was available and used it in my glow models as I needed 8 channels for my gassers and I was still a bit unsure of the technology. I could not believe the difference in the control response of the DX-7 vs. my 9Z. Still I was a bit leery and kept the Futaba's until my X9303 got here and I started using it in my models including the gassers. I sold both the Futaba tx's and all my 72MHz rx's....

There are things I miss about the programming/features of the 9Z vs. the X9303 but as I've said before, it's not fair to compare features of a $1200 radio vs. a $600 radio. Other than that, I'm completely happy with my decision to switch to the JR stuff and I won't go back...

Hope that helps?

[JustPlaneCrazy]

I got a Brand New X9303 2.4GHZ for sale in the swap shop.....


http://www.flyinggiants.com/swapshop...uct=5841&cat=3