C-ARF Ultra Flash build Thread + Video
05-27-2015, 05:20 AM
#4752
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I had that issue with my UF , I spoke with Dave and his advice was which he gave you , The other guy that says to check to push rod lengths is also something to look at .
But here is what my problem was ( as Dave Mentioned ) There is run off glue on the flap joints , you have to carefully remove it and check the flaps operation by hand no radio until it is very smooth and closes without any pressure . Trust me I thought I had done right but upon looking at it again I saw binding and that is what the problem is . I struggled with mine for months and lots of buzzing servos . Mine works so smooth now. Nooo binding and quite servos . Take the time and do this carefully and the problem will go away .
Use a fine sand paper and a small file and work slowly checking periodically to make sure not to do too much .
That is what is the problem nothing else .I was very frustrated as well.
But here is what my problem was ( as Dave Mentioned ) There is run off glue on the flap joints , you have to carefully remove it and check the flaps operation by hand no radio until it is very smooth and closes without any pressure . Trust me I thought I had done right but upon looking at it again I saw binding and that is what the problem is . I struggled with mine for months and lots of buzzing servos . Mine works so smooth now. Nooo binding and quite servos . Take the time and do this carefully and the problem will go away .
Use a fine sand paper and a small file and work slowly checking periodically to make sure not to do too much .
That is what is the problem nothing else .I was very frustrated as well.
I am not sure I fully understand. Are you referring to the outside of the flap hinge on the bottom underside of the flap? Mine has what looks like excessive glue in the flap joint on the bottom outside, so when the flap is fully up there could be pressure in that area preventing the flap from closing the last 1/4 inch. As far as the inside area of the flap hinge I have removed anything that would cause a bind.
If the bottom outside of the hinge is what you are referring to You would have to be extremely careful in removing the excess glue for fear of damaging the hinge. So Is that the area you are referring to?
Guys thanks for all the feed back. The flash is such a nice flying plane. I also had the original flash and loved it also.
Stan
Dieselman, Nothing sounds crazy to me at this point if it will fix the problem. However with the push rod removed the flap still springs away from full up the last 1/4 of an inch which makes me believe the flap resistance is the culprit.
05-27-2015, 06:01 AM
#4754
05-27-2015, 06:35 AM
#4755
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Stan,
Although this is no solution to avoid striving for the perfect setup, I always keep my planes at half flap position when powered up on the ground as it has the least current draw than full up or down. When taxiing back from landing I switch back to half as well. I've seen and had discussions with people who say they have their plane setup where they draw no current which is ridiculous. Idle current alone on say six or eight high torque digital servos is probably 20-30 ma each so anywhere from 120ma to 240ma for the whole aircraft.
Although this is no solution to avoid striving for the perfect setup, I always keep my planes at half flap position when powered up on the ground as it has the least current draw than full up or down. When taxiing back from landing I switch back to half as well. I've seen and had discussions with people who say they have their plane setup where they draw no current which is ridiculous. Idle current alone on say six or eight high torque digital servos is probably 20-30 ma each so anywhere from 120ma to 240ma for the whole aircraft.
05-27-2015, 07:24 AM
#4756
My Feedback: (1)
Stan,
Although this is no solution to avoid striving for the perfect setup, I always keep my planes at half flap position when powered up on the ground as it has the least current draw than full up or down. When taxiing back from landing I switch back to half as well. I've seen and had discussions with people who say they have their plane setup where they draw no current which is ridiculous. Idle current alone on say six or eight high torque digital servos is probably 20-30 ma each so anywhere from 120ma to 240ma for the whole aircraft.
Although this is no solution to avoid striving for the perfect setup, I always keep my planes at half flap position when powered up on the ground as it has the least current draw than full up or down. When taxiing back from landing I switch back to half as well. I've seen and had discussions with people who say they have their plane setup where they draw no current which is ridiculous. Idle current alone on say six or eight high torque digital servos is probably 20-30 ma each so anywhere from 120ma to 240ma for the whole aircraft.
Although I am far from an expert, I have checked current draw in all of my planes.I always try and keep the draw at idle below .10
Although I can't explain the cause for my servo to burn up, the higher current draw at idle is suspect.
My guess is that when the plane is flying there is enough lift created by the wing to take the load off of the flaps. Just a guess.
Although keeping the flaps at 1/2 flap will take the load off of the servo it is not a real fix for the problem.
If there is no load on the servo at idle the draw on my amp meter should be close to zero. As i mentioned in a previous post at approach flaps and landing flaps my amp meter shows 0-2 draw which is nothing. Only when the flap goes to up (last 1/4 inch) does the draw jump to 17-20.
Stan
05-27-2015, 07:48 AM
#4758
My Feedback: (1)
I am beginning to think that most people that own Ultra flash"s are having some amount of buzzing when there flaps are fully up and are just accepting it. Probably most have not checked the amount of current draw at idle in the fully up position and are just living with it.
I guess I will join the group that keeps their flaps at approach or down when I am on the ground. I have done everything to eliminate the high draw that I can.
Thanks for all the help guys
Stan
05-27-2015, 08:07 AM
#4760
My Feedback: (80)
My flaps do buzz a slight bit when fully up. But the lightest finger pressure on the bottom of the wing pretty much stops it. So I call it good. Should be pretty well unloaded in flight I would guess. I do the same as afterburner does, on all of my jets I'm in the habit of leaving the flaps in the takeoff setting during ground ops. The only time they are ever fully retracted is during flight.
05-28-2015, 11:54 PM
#4765
Join Date: Apr 2013
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Thanks guys for the hints on the flaps. I had buzzing. spent last night going over your tips above. Cleaned the joins, made sure the edges are not catching( a very light sand here...microscopic amount)...checked the push rod...now no buzzing....awesome stuff... I can make them buzz if I push on them with my finger as one of the guys mentioned...but now none 99.999% of the time....great stuff.....
06-27-2015, 12:04 PM
#4767
Test flew Barbie today. Was a bit disappointed with speed. Looking at installing a 180
i believe the airframe can handle the power
ans have seen some vids
has anyone that installed one had a problem ??
i believe the airframe can handle the power
ans have seen some vids
has anyone that installed one had a problem ??
06-27-2015, 12:56 PM
#4769
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06-29-2015, 05:10 PM
#4772
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I radared an Ultra Flash with a JC 180RXI @ 301MPH, when he went by, the hair on the back of my neck stood straight up!
The only planes I've seen faster is my buds up @ Weldon DSing @ between 400 and 500MPH, actually I think they are at 505 MPH now. Believe me, when one of the baby's come by, you seek cover, till you figure out what the Hells goin on.
The only planes I've seen faster is my buds up @ Weldon DSing @ between 400 and 500MPH, actually I think they are at 505 MPH now. Believe me, when one of the baby's come by, you seek cover, till you figure out what the Hells goin on.
06-29-2015, 11:19 PM
#4773
I've got a 180RX in mine and have just under 150 flights on it. I have really been hard on the plane and it has just soaked it up - I've flown it hard, been horribly incompetent with it and fluffed landing etc and it always comes back ok. It's actually quite incredible how tough these planes are and how well they fly. It really is a brilliant package.