C-ARF Ultra Flash build Thread + Video
05-15-2013, 11:30 AM
#2976
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: IFlyEm35
I'm writing from my phone so I'll give you the Cliff's Notes version and update it once I get to a computer.
You are correct. Weight affects stall speed. Your CG is in front on your center of lift. This is why the nose drops when the wing stalls. So when in normal flight, to offset the nose dropping the tail produces a tail down force. This force adds to the overall weight the wings need to support. So move the CG forward and an increased tail down force is required to offset it. This results in the higher wing loading and increased stall speed.
ORIGINAL: Beavis
Could you please elaborate on that basic concept (for the non-aerodynamicist)? I always thought that, with regard to weight, the stall speed was affected only by the overall weight and not by the CG as well. Of course, it appears that I thought wrong...
Thank you in advance.
One of the benefits of having an aft CG is a lower stall speed so that would make sense.
Thank you in advance.
You are correct. Weight affects stall speed. Your CG is in front on your center of lift. This is why the nose drops when the wing stalls. So when in normal flight, to offset the nose dropping the tail produces a tail down force. This force adds to the overall weight the wings need to support. So move the CG forward and an increased tail down force is required to offset it. This results in the higher wing loading and increased stall speed.
To expand:
Stalling is a component of reaching the critical AOA (Angle of Attack). AOA is increased with a forward CG because the increased distance between the center of pressure (lift) and the CG. This requires the tail to produce more downforce to keep the nose from dropping. That downforce then has to be overcome with more lift. To create more lift AOA is increased.
Think of a teeter totter. One end is the nose of the aircraft, the other is the tail and the pivot point is the center of lift. If your CG is is ON the center of lift, the pivot point, both ends of the teeter toter or very light and easy to move. This would be unstable in the world of aviation. But would have the slowest stall speed. So the CG has to be moved towards the front of the plane. (So when the aircraft is in a stalled state the nose drops so the aircraft can recover.) This causes the nose side of the teeter toter to come down. To combat that we have the horizontal stabilizer. This creates the taildown force to lift the nose.
As that CG moves closer to the nose end of the teeter toter it take more and more pressure on the opposite end to counter act that. As pressure is added the more force is being applied as the pivot point (i.e. lift). So in a nustshell, the more weight the wings have to support the higher the AOA, the higher the stall speed.
05-15-2013, 12:29 PM
#2977
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RE: C-ARF Ultra Flash build Thread + Video
IFlyEm,
Thank you for the expansion and helpful pictures. Expanding on my previous note as well, correct me if I’m wrong, but it appears that basically what you are saying is that a more forward CG increases the load factor. As you probably know better than me, load factor is a well-established variable defined as:
n = L/W, where:
n = load factor
L = lift
W = weight
It is also well established that the load factor affects stall speed through the formula:
Vst = Vs √n, where:
Vst = stall speed
Vs = stall speed in straight, level flight
√n = square root of the load factor
This is also why the stall speed increases during high load maneuvers, such as high bank turns and certain aerobatic moves.
Wow, look at all that math in RCU!
05-15-2013, 01:17 PM
#2979
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: Beavis
IFlyEm,
Thank you for the expansion and helpful pictures. Expanding on my previous note as well, correct me if I’m wrong, but it appears that basically what you are saying is that a more forward CG increases the load factor. As you probably know better than me, load factor is a well-established variable defined as:
n = L/W, where:
n = load factor
L = lift
W = weight
It is also well established that the load factor affects stall speed through the formula:
Vst = Vs √n, where:
Vst = stall speed
Vs = stall speed in straight, level flight
√n = square root of the load factor
This is also why the stall speed increases during high load maneuvers, such as high bank turns and certain aerobatic moves.
Wow, look at all that math in RCU!
IFlyEm,
Thank you for the expansion and helpful pictures. Expanding on my previous note as well, correct me if I’m wrong, but it appears that basically what you are saying is that a more forward CG increases the load factor. As you probably know better than me, load factor is a well-established variable defined as:
n = L/W, where:
n = load factor
L = lift
W = weight
It is also well established that the load factor affects stall speed through the formula:
Vst = Vs √n, where:
Vst = stall speed
Vs = stall speed in straight, level flight
√n = square root of the load factor
This is also why the stall speed increases during high load maneuvers, such as high bank turns and certain aerobatic moves.
Wow, look at all that math in RCU!
Load Factor is the ratio of Lift to Weight. Essentially it is a G-Force. So in straight and level unaccelrated flight the load factor is +1. So if the weight goes up the lift needs to be increased. But doesn't directly indicate an increase in load factor. As long as they are equal the load factor is +1.
Load Factor increases as you increase lift. I.E. if you develop 4000lb of lift and the craft weighs 2000 lbs you are acheiving a load factor of +2.0. When pulling out of a dive or a tight turn and you have an accelerated stall it is when the lift (created by AOA) exceeds the Critical AOA and a stall is achieved.
05-16-2013, 07:01 AM
#2980
My Feedback: (7)
RE: C-ARF Ultra Flash build Thread + Video
I, for one, am enjoying this thread immensely. It just so happens I've been having trouble landing my Ultra lately. I'm flying out of a fairly short grass strip and I've been using flaps only - no crow. My problem? I'm having trouble judging stall speed. I've been flying model aircraft my whole life and this is a first. This was precipitated by the aircraft dropping a wing in the pattern (turning from base to final). It's a miracle I didn't destroy it, but since then I don't trust it a bit. Obviously it was my fault for going too slowly but I got no indication that I was nipping at the verge of a stall and REALLY felt like I had plenty of speed for the approach.
It's very obvious that it's purely a matter of personal preference whether to use crow or not but I just went into my DX18 program and reactivated the crow that I used when this aircraft was a classic. I'm going to see what it think of it on the Ultra. I'm hoping crow will be more predictable in the pattern.
(For those that may wonder, my CG is biased to the rear - probably in the 235mm area, and I've been using 85mm full flap setting).
It's very obvious that it's purely a matter of personal preference whether to use crow or not but I just went into my DX18 program and reactivated the crow that I used when this aircraft was a classic. I'm going to see what it think of it on the Ultra. I'm hoping crow will be more predictable in the pattern.
(For those that may wonder, my CG is biased to the rear - probably in the 235mm area, and I've been using 85mm full flap setting).
05-16-2013, 08:17 AM
#2981
Thread Starter
RE: C-ARF Ultra Flash build Thread + Video
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
05-16-2013, 08:35 AM
#2982
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: Dave Wilshere
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
05-16-2013, 10:05 AM
#2983
RE: C-ARF Ultra Flash build Thread + Video
I'm guessing that the differences are just due to people's setups and flying styles but seeing as there seem to be 2 distinct groups of experiences with this model makes me wonder, do CARF only have one mould/jig for the wing? If there are more than one, is it possible that one of them is different to another?
Are all Ultra Flashes the same?
Are all Ultra Flashes the same?
05-16-2013, 10:15 AM
#2984
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: siclick33
I'm guessing that the differences are just due to people's setups and flying styles but seeing as there seem to be 2 distinct groups of experiences with this model makes me wonder, do CARF only have one mould/jig for the wing? If there are more than one, is it possible that one of them is different to another?
Are all Ultra Flashes the same?
I'm guessing that the differences are just due to people's setups and flying styles but seeing as there seem to be 2 distinct groups of experiences with this model makes me wonder, do CARF only have one mould/jig for the wing? If there are more than one, is it possible that one of them is different to another?
Are all Ultra Flashes the same?
if not you buy Dave A BEER
Who is up to the challenge ???
I'll put up the first beer if i am wrong .
05-16-2013, 10:16 AM
#2985
My Feedback: (57)
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: siclick33
I'm guessing that the differences are just due to people's setups and flying styles but seeing as there seem to be 2 distinct groups of experiences with this model makes me wonder, do CARF only have one mould/jig for the wing? If there are more than one, is it possible that one of them is different to another?
Are all Ultra Flashes the same?
I'm guessing that the differences are just due to people's setups and flying styles but seeing as there seem to be 2 distinct groups of experiences with this model makes me wonder, do CARF only have one mould/jig for the wing? If there are more than one, is it possible that one of them is different to another?
Are all Ultra Flashes the same?
05-16-2013, 10:16 AM
#2986
My Feedback: (7)
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: IFlyEm35
I agree. I find it interesting how many people are having issues with the model stalling. Mine is about as heavy as they come as I have every tank imaginable, smoke, and the monster battery required for the kero start Kingtechs. I set up for slow flight and crawl the model around. Not once has the wing even burbled. I am currently on a trip and won't be home for a couple days but I'll check my CG when I get home. I am sure its located right infront of the main gear legs. The nose wheel is EXTREMELY light as seen in my video when it's taxiing.
ORIGINAL: Dave Wilshere
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
05-16-2013, 11:09 AM
#2988
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RE: C-ARF Ultra Flash build Thread + Video
So you balance yours right side up?
ORIGINAL: Dave Wilshere
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
05-16-2013, 12:19 PM
#2989
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: Dave Wilshere
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
Bluebus, I've never had a wing drop with crow, even at walking speed.
05-16-2013, 06:43 PM
#2990
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: siclick33
...do CARF only have one mould/jig for the wing? If there are more than one, is it possible that one of them is different to another?
Are all Ultra Flashes the same?
...do CARF only have one mould/jig for the wing? If there are more than one, is it possible that one of them is different to another?
Are all Ultra Flashes the same?
05-16-2013, 07:41 PM
#2991
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: mitchilito
Iflyem35, I find it interesting that you totally agree with DW. Didn't I read somewhere on this thread that you are using crow? So were you having issues before the crow? Or no issues either before or after? Or neither. If neither, why then the crow?
ORIGINAL: IFlyEm35
I agree. I find it interesting how many people are having issues with the model stalling. Mine is about as heavy as they come as I have every tank imaginable, smoke, and the monster battery required for the kero start Kingtechs. I set up for slow flight and crawl the model around. Not once has the wing even burbled. I am currently on a trip and won't be home for a couple days but I'll check my CG when I get home. I am sure its located right infront of the main gear legs. The nose wheel is EXTREMELY light as seen in my video when it's taxiing.
ORIGINAL: Dave Wilshere
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
We fly from a 290' strip, and It's no problem flying the UF in and out even in calmer conditions. Personally I've never felt the UF was going to stall and you get sooo much information from the feel of the aeroplane through the sticks.
I've had some contact about where the balance is measured, so I did this on an UF I'm building now...
Dw
I only flew the model once with flap only. I do not recall how slow I flew it on the maiden. I put the crow in because I didn't care for the nose down attitude the airplane assumed with the flaps. My personal preference is the crow attitude. But I never felt the model has been anything but solid.
05-16-2013, 10:54 PM
#2992
Thread Starter
RE: C-ARF Ultra Flash build Thread + Video
Checked and its not 1st April
You think a company like CARF make different shape wings...can't drink my morning coffee I'm smiling so much. This thread really has lost it!
All these people having trouble...
Of the many many hundreds of UF flying I've heard of...none, except on here this last two weeks. Yes there will be a few people who weren't sure, who now come forward, but I'm telling you there is no issue with this aeroplane. Its the best all around sports jet yet.
We can't see the radio set ups, how the model was built, there can be a HUGE difference in weight. I don't land my model with lots of "heavy" fuel still on board-I'm sure its not so nice 'heavy' but I've flown it in enough conditions like last Sunday which was a horrid wind and never had the Uh oh moment landing.
This is a sports jet capable of near 300mph and flies out of a 290' strip no problem. It has one of the biggest speed ranges I know of.
In England there are a lot of pilots flying UF's and I've yet to be contacted about "stalling" I'd say we are 50-50 on CROW, no CROW of people I can think of. Some people land just fine without and some just fine with. Ali started using it as he prefered the feel on landing, I've never heard him say because it was wing dropping. There is nothing to stop you having either set up. In my mind if just one or two people don't stall/flick their UF's in without CROW and a tonne of flap it proves the model is fine...or are ALL these people exceptional pilots??
Geee I'm all for looking at the problem and trying to help but this "Problem" is really getting me...pi**sed.
I've said it before and I'll say it one last time. I've flown a lot of Ultra Flashes, so from the various moulds and I've never seen an issue, its a complete bolt from the blue.
Anyone wants my input please pm as I'm going to stay away from this keyboard punching thread for a few days
Dave
You think a company like CARF make different shape wings...can't drink my morning coffee I'm smiling so much. This thread really has lost it!
All these people having trouble...
Of the many many hundreds of UF flying I've heard of...none, except on here this last two weeks. Yes there will be a few people who weren't sure, who now come forward, but I'm telling you there is no issue with this aeroplane. Its the best all around sports jet yet.
We can't see the radio set ups, how the model was built, there can be a HUGE difference in weight. I don't land my model with lots of "heavy" fuel still on board-I'm sure its not so nice 'heavy' but I've flown it in enough conditions like last Sunday which was a horrid wind and never had the Uh oh moment landing.
This is a sports jet capable of near 300mph and flies out of a 290' strip no problem. It has one of the biggest speed ranges I know of.
In England there are a lot of pilots flying UF's and I've yet to be contacted about "stalling" I'd say we are 50-50 on CROW, no CROW of people I can think of. Some people land just fine without and some just fine with. Ali started using it as he prefered the feel on landing, I've never heard him say because it was wing dropping. There is nothing to stop you having either set up. In my mind if just one or two people don't stall/flick their UF's in without CROW and a tonne of flap it proves the model is fine...or are ALL these people exceptional pilots??
Geee I'm all for looking at the problem and trying to help but this "Problem" is really getting me...pi**sed.
I've said it before and I'll say it one last time. I've flown a lot of Ultra Flashes, so from the various moulds and I've never seen an issue, its a complete bolt from the blue.
Anyone wants my input please pm as I'm going to stay away from this keyboard punching thread for a few days
Dave
05-17-2013, 05:47 AM
#2994
RE: C-ARF Ultra Flash build Thread + Video
While it is possible that there are manufacturing tolerances that will cause some variances, i feel that considering the posibility of several moulds that could have huge differences is a bit overboard, I still believe there is nothing wrong with the design, can't understand why that has been implied, I still believe the problem is in the set-up, and with all due respect, just because an individual did not experience the "dropping wingtip" does not mean it did not hapoen, come on! there is actual video evidence, why woudl people lie about it?
05-17-2013, 06:02 AM
#2995
My Feedback: (7)
RE: C-ARF Ultra Flash build Thread + Video
Many, if not most, aircraft will drop a wing if allowed to stall. Just because I let it happen once is not a reflection on the aircraft. I believe the Flash, both CF and UF (I've owned both) are FINE aircraft - and very honest.
When I say I'm having trouble feeling my way around the stall It's certainly no reflection on this fine machine. Let's not take any of this personally!
When I say I'm having trouble feeling my way around the stall It's certainly no reflection on this fine machine. Let's not take any of this personally!
05-17-2013, 03:29 PM
#2997
My Feedback: (7)
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: Dave Wilshere
Checked and its not 1st April
You think a company like CARF make different shape wings...can't drink my morning coffee I'm smiling so much. This thread really has lost it!
All these people having trouble...
Of the many many hundreds of UF flying I've heard of...none, except on here this last two weeks. Yes there will be a few people who weren't sure, who now come forward, but I'm telling you there is no issue with this aeroplane. Its the best all around sports jet yet.
We can't see the radio set ups, how the model was built, there can be a HUGE difference in weight. I don't land my model with lots of ''heavy'' fuel still on board-I'm sure its not so nice 'heavy' but I've flown it in enough conditions like last Sunday which was a horrid wind and never had the Uh oh moment landing.
This is a sports jet capable of near 300mph and flies out of a 290' strip no problem. It has one of the biggest speed ranges I know of.
In England there are a lot of pilots flying UF's and I've yet to be contacted about ''stalling'' I'd say we are 50-50 on CROW, no CROW of people I can think of. Some people land just fine without and some just fine with. Ali started using it as he prefered the feel on landing, I've never heard him say because it was wing dropping. There is nothing to stop you having either set up. In my mind if just one or two people don't stall/flick their UF's in without CROW and a tonne of flap it proves the model is fine...or are ALL these people exceptional pilots??
Geee I'm all for looking at the problem and trying to help but this ''Problem'' is really getting me...pi**sed.
I've said it before and I'll say it one last time. I've flown a lot of Ultra Flashes, so from the various moulds and I've never seen an issue, its a complete bolt from the blue.
Anyone wants my input please pm as I'm going to stay away from this keyboard punching thread for a few days
Dave
Checked and its not 1st April
You think a company like CARF make different shape wings...can't drink my morning coffee I'm smiling so much. This thread really has lost it!
All these people having trouble...
Of the many many hundreds of UF flying I've heard of...none, except on here this last two weeks. Yes there will be a few people who weren't sure, who now come forward, but I'm telling you there is no issue with this aeroplane. Its the best all around sports jet yet.
We can't see the radio set ups, how the model was built, there can be a HUGE difference in weight. I don't land my model with lots of ''heavy'' fuel still on board-I'm sure its not so nice 'heavy' but I've flown it in enough conditions like last Sunday which was a horrid wind and never had the Uh oh moment landing.
This is a sports jet capable of near 300mph and flies out of a 290' strip no problem. It has one of the biggest speed ranges I know of.
In England there are a lot of pilots flying UF's and I've yet to be contacted about ''stalling'' I'd say we are 50-50 on CROW, no CROW of people I can think of. Some people land just fine without and some just fine with. Ali started using it as he prefered the feel on landing, I've never heard him say because it was wing dropping. There is nothing to stop you having either set up. In my mind if just one or two people don't stall/flick their UF's in without CROW and a tonne of flap it proves the model is fine...or are ALL these people exceptional pilots??
Geee I'm all for looking at the problem and trying to help but this ''Problem'' is really getting me...pi**sed.
I've said it before and I'll say it one last time. I've flown a lot of Ultra Flashes, so from the various moulds and I've never seen an issue, its a complete bolt from the blue.
Anyone wants my input please pm as I'm going to stay away from this keyboard punching thread for a few days
Dave
05-18-2013, 12:19 AM
#2998
RE: C-ARF Ultra Flash build Thread + Video
You think a company like CARF make different shape wings...can't drink my morning coffee I'm smiling so much. This thread really has lost it!
It was unlikely to be the case and, as I stated in my previous post, the few problems that people are experiencing are probably due to setup and flying style, but it was possible which is why I asked the question. If Dave says that all the moulds are fine then that's my question answered.
05-18-2013, 08:15 AM
#2999
My Feedback: (57)
RE: C-ARF Ultra Flash build Thread + Video
ORIGINAL: Dave Wilshere
Checked and its not 1st April
You think a company like CARF make different shape wings...can't drink my morning coffee I'm smiling so much. This thread really has lost it!
All these people having trouble...
Of the many many hundreds of UF flying I've heard of...none, except on here this last two weeks. Yes there will be a few people who weren't sure, who now come forward, but I'm telling you there is no issue with this aeroplane. Its the best all around sports jet yet.
We can't see the radio set ups, how the model was built, there can be a HUGE difference in weight. I don't land my model with lots of ''heavy'' fuel still on board-I'm sure its not so nice 'heavy' but I've flown it in enough conditions like last Sunday which was a horrid wind and never had the Uh oh moment landing.
This is a sports jet capable of near 300mph and flies out of a 290' strip no problem. It has one of the biggest speed ranges I know of.
In England there are a lot of pilots flying UF's and I've yet to be contacted about ''stalling'' I'd say we are 50-50 on CROW, no CROW of people I can think of. Some people land just fine without and some just fine with. Ali started using it as he prefered the feel on landing, I've never heard him say because it was wing dropping. There is nothing to stop you having either set up. In my mind if just one or two people don't stall/flick their UF's in without CROW and a tonne of flap it proves the model is fine...or are ALL these people exceptional pilots??
Geee I'm all for looking at the problem and trying to help but this ''Problem'' is really getting me...pi**sed.
I've said it before and I'll say it one last time. I've flown a lot of Ultra Flashes, so from the various moulds and I've never seen an issue, its a complete bolt from the blue.
Anyone wants my input please pm as I'm going to stay away from this keyboard punching thread for a few days
Dave
Checked and its not 1st April
You think a company like CARF make different shape wings...can't drink my morning coffee I'm smiling so much. This thread really has lost it!
All these people having trouble...
Of the many many hundreds of UF flying I've heard of...none, except on here this last two weeks. Yes there will be a few people who weren't sure, who now come forward, but I'm telling you there is no issue with this aeroplane. Its the best all around sports jet yet.
We can't see the radio set ups, how the model was built, there can be a HUGE difference in weight. I don't land my model with lots of ''heavy'' fuel still on board-I'm sure its not so nice 'heavy' but I've flown it in enough conditions like last Sunday which was a horrid wind and never had the Uh oh moment landing.
This is a sports jet capable of near 300mph and flies out of a 290' strip no problem. It has one of the biggest speed ranges I know of.
In England there are a lot of pilots flying UF's and I've yet to be contacted about ''stalling'' I'd say we are 50-50 on CROW, no CROW of people I can think of. Some people land just fine without and some just fine with. Ali started using it as he prefered the feel on landing, I've never heard him say because it was wing dropping. There is nothing to stop you having either set up. In my mind if just one or two people don't stall/flick their UF's in without CROW and a tonne of flap it proves the model is fine...or are ALL these people exceptional pilots??
Geee I'm all for looking at the problem and trying to help but this ''Problem'' is really getting me...pi**sed.
I've said it before and I'll say it one last time. I've flown a lot of Ultra Flashes, so from the various moulds and I've never seen an issue, its a complete bolt from the blue.
Anyone wants my input please pm as I'm going to stay away from this keyboard punching thread for a few days
Dave
Jay
05-18-2013, 08:39 AM
#3000
RE: C-ARF Ultra Flash build Thread + Video
Jay, you have to do something really stupid to stall the Flash/Ultra Flash. I know because I did something really stupid to cause the stall. At the speed and AOA I was flying, any plane would stall. That was flight #1 and I put 500 more flights on it and never stalled it again.