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Offline Chuck Edwards  
#136 Posted : Wednesday, August 30, 2017 10:19:10 AM(UTC)
Chuck Edwards

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United States

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Thanks Walter. It just seems crazy that Greg is having that many issues with the rear bearing. Either it is a manufacturing issue or a mounting issue. Maybe need to find a way to stabilize the front of the motor so that tha rear bearing is not carrying the full load.
Charles Edwards
TEAM FUTABA
Professional UAS pilot.
Putting the Man in Unmanned.
It takes less time to do something right
than to explain why it was done wrong.
HWL.
Offline Walter  
#137 Posted : Wednesday, August 30, 2017 10:20:53 AM(UTC)
Walter

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XPWR60 is a powerful new motor that probably needs to upgrade their bearings. EF has always warranted their products. They will fix this.
Offline rclad  
#138 Posted : Wednesday, August 30, 2017 10:31:54 AM(UTC)
rclad

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I hope they fix the issue soon. I loved it when it was working, but it's not reliable as is for competition. Sending replacements under warranty is fine if you're just flying occasionally, but not when you're on a schedule that requires your equipment to be ready and working every week.
Greg Hladky
Flying on a wing and a purpose...
and physics, power, practice, preparation, plans...
and pioneers who pushed the envelope!
Offline Walter  
#139 Posted : Wednesday, August 30, 2017 10:37:50 AM(UTC)
Walter

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Change prop to a 22"3blade. This will increase your thrust, but reduce some of the angular forces on the shaft. Or you can shop for an aftermarket bearing .
Offline rclad  
#140 Posted : Wednesday, August 30, 2017 10:54:09 AM(UTC)
rclad

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I'll have to look into the three blade option. After Muncie in September I'll have the bearing replaced with a better quality after market one. For now the Motrolfly will get me through the next two IMAC events. I like the efficiency and lighter weight of the new motor.

You can see pics of the Xpwr mounting here and failure here. I began to wonder after the third failure if my installation had anything to do with it. Let me know if you see anything wrong.
Greg Hladky
Flying on a wing and a purpose...
and physics, power, practice, preparation, plans...
and pioneers who pushed the envelope!
Offline Walter  
#141 Posted : Wednesday, August 30, 2017 11:31:02 AM(UTC)
Walter

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When you shop for a bearing, remember 2 is always better than one. Measure depth of cavity where bearing seats, then use that measurement to allow 2 like bearings to fit there. Two sets of ball bearings are better than one.
thanks 1 user thanked Walter for this useful post.
rclad on 8/30/2017(UTC)
Offline rclad  
#142 Posted : Saturday, September 9, 2017 9:08:04 PM(UTC)
rclad

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I just flew the 2018 Sportsman sequence today, twice in one flight, and landed with about 25% reserve. Winds were light to moderate and I was climbing to about 800' AGL (from telemetry). Glad to know I can do it (even though it wasn't pretty) with the setup I have. Thanks to Ray Morton for calling for me and letting me try his Falcon CF electric 24x10 prop. It increased the efficiency of my setup, but I was still able to do double sequences with my Xoar 24x10 PJN prop.

EF 87" Extra 300 SHP
Motrolfly DM 5335 189 kv
CC Phoenix Edge 160HV ESC
Xoar 24x10 PJN
Glacier 30C 12s 6000 mAh
AUW 20.5 pounds
Greg Hladky
Flying on a wing and a purpose...
and physics, power, practice, preparation, plans...
and pioneers who pushed the envelope!
thanks 1 user thanked rclad for this useful post.
Gil R. Major on 9/12/2017(UTC)
Offline Dangerous Dan  
#143 Posted : Monday, September 11, 2017 12:33:00 PM(UTC)
Dangerous Dan

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Originally Posted by: rclad Go to Quoted Post
I just flew the 2018 Sportsman sequence today, twice in one flight, and landed with about 25% reserve. Winds were light to moderate and I was climbing to about 800' AGL (from telemetry). Glad to know I can do it (even though it wasn't pretty) with the setup I have. Thanks to Ray Morton for calling for me and letting me try his Falcon CF electric 24x10 prop. It increased the efficiency of my setup, but I was still able to do double sequences with my Xoar 24x10 PJN prop.

EF 87" Extra 300 SHP
Motrolfly DM 5335 189 kv
CC Phoenix Edge 160HV ESC
Xoar 24x10 PJN
Glacier 30C 12s 6000 mAh
AUW 20.5 pounds


RC lad

Try making a throttle to throttle mix where you can flip a switch and only have 80-90% power for the first sequence. When you finish the first sequence flip the switch to allow 100 % remaining power for the second sequence. This will give u a little more flying time but better yet the power should be similar between the two sequences and not fade as much on the second

thanks 1 user thanked Dangerous Dan for this useful post.
rclad on 9/11/2017(UTC)
Offline rclad  
#144 Posted : Monday, September 11, 2017 12:38:21 PM(UTC)
rclad

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Excellent idea! Thank you.
Greg Hladky
Flying on a wing and a purpose...
and physics, power, practice, preparation, plans...
and pioneers who pushed the envelope!
Offline Steve Stanton  
#145 Posted : Tuesday, September 12, 2017 11:25:07 AM(UTC)
Steve Stanton

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Great to see this kind of innovation with electric powered planes. I think there is a lot more that can be done to
maximize the flight times on these planes. I was surprised to see that the U-Control folks have some pretty advanced electronics to control motor speeds in relation to motor loads.
Maybe we could get some regenerated power from the motors on down lines.
Offline kjetilmh  
#146 Posted : Wednesday, September 13, 2017 1:50:06 PM(UTC)
kjetilmh

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Originally Posted by: Dangerous Dan Go to Quoted Post
RC lad

Try making a throttle to throttle mix where you can flip a switch and only have 80-90% power for the first sequence. When you finish the first sequence flip the switch to allow 100 % remaining power for the second sequence. This will give u a little more flying time but better yet the power should be similar between the two sequences and not fade as much on the second



Or use this :
http://www.tech-aero.net/throttle-tech

Offline Thebest102  
#147 Posted : Wednesday, September 13, 2017 9:15:13 PM(UTC)
Thebest102

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The tech aero units have been working great in pattern planes. They help give the throttle a linear feel by limiting throttle slightly in the beginning of the flight much like a throttle to throttle mix would. Only with this you do not have to move a switch or possibly have it in the wrong setting. With a throttle tech though make sure the rcvr is powered on before the flight batteries are connected. I do this with an arm safe connector. The routine I use is power on both rcvr packs check control surfaces then right before flight install arm safe and count cell beeps. Check tx for Telemetry voltages then fly
thanks 2 users thanked Thebest102 for this useful post.
Kevin Wilson on 9/14/2017(UTC), kjetilmh on 9/14/2017(UTC)
Offline rclad  
#148 Posted : Thursday, September 14, 2017 11:42:59 AM(UTC)
rclad

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Good to know about the Tech Aero unit. Other than the expense and extra 1/2 ounce of weight, it looks like an ideal solution. One tweak on the throttle to throttle mix could be to make it dependent on a timer. Once you know the typical flight time for a double sequence, you could divide that up into time segments and step up the throttle mix to gradually increase throttle response throughout the flight. Then there would be no need for a switch. Would that work?
Greg Hladky
Flying on a wing and a purpose...
and physics, power, practice, preparation, plans...
and pioneers who pushed the envelope!
Offline kjetilmh  
#149 Posted : Thursday, September 14, 2017 12:32:02 PM(UTC)
kjetilmh

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The tech aero unit will also reduse the performane differences between new and old batteries. A good configuration is to have a setup thar is over powered and use the aero unit to reduse the power level.

It might be possible to use a time dependent mix. Not sure how. Do not think it is possible on my futaba.
Offline rclad  
#150 Posted : Thursday, September 14, 2017 12:58:37 PM(UTC)
rclad

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I just checked the OpenTx course on mixes. The FrSky Taranis allows a logical switch to control the activation of a mix. By setting up logical switches that become true at set time intervals, increasing levels of mix can be activated based on the current time. So it looks to be possible. I'll have to give it a try and report back.
Greg Hladky
Flying on a wing and a purpose...
and physics, power, practice, preparation, plans...
and pioneers who pushed the envelope!
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