Another MiG29 goes down. This time one of the new "Red Stars". What's with these guys? Even before the mid-air touch, it was a flying roller coaster. (I don't think the mid-air did any damage.) They don't seem to know how to set these things up or know how to balance them or they just don't know how to fly them. The MiG wasn't the only "roller coaster" out there. Many of them were going up and down like a yoyo.
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A lot of interesting things happening. First they post a lot of videos and there is typically a high percentage of flying "issues" at that site. Many of the planes dis not look set up well, too much pitch or other axis authority. Then flying large and small EDFs and a bush plane together. At the end it looks like the person was in semi alpha lock.
If you remember, when the MiG first came out they lost a few. I said then it looked like they didn't know there were three places for batteries and used the forward and aft ones making their planes very nose heavy causing issues. This looks surprisingly similar to that but with TV to further mess with controlability.
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Originally posted by Evan D View PostA lot of interesting things happening. First they post a lot of videos and there is typically a high percentage of flying "issues" at that site. Many of the planes dis not look set up well, too much pitch or other axis authority. Then flying large and small EDFs and a bush plane together. At the end it looks like the person was in semi alpha lock.
If you remember, when the MiG first came out they lost a few. I said then it looked like they didn't know there were three places for batteries and used the forward and aft ones making their planes very nose heavy causing issues. This looks surprisingly similar to that but with TV to further mess with controlability.
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Originally posted by radfordc View Post
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Originally posted by xviper View PostYou guys still don't have him on IGNORE? Shouldn't quote him either. That way, nothing he posts will show. Eventually, the mods will see what he's doing and deal with it.
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dbirds2 please self-edit OR self-delete your posts over the last 24 hours in the forums. Clearly, I do not need to explain why. Respectfully, LBI solemnly swear to "over-celebrate" the smallest of victories.~Lucky B*st*rd~
You'll never be good at something unless you're willing to suck at it first.~Anonymous~
AMA#116446
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Hi, going to maiden this as soon as the windy weather lets up. I have read a lot in this thread but not every post. Appreciate all the info here! This has the upgraded elevator servos, arms, rods, etc.. This is my 2nd EDF. Been flying the FW L-39. This is my first twin verticals plane and when checking the rudder throws, the left and right rudders don't match each other. Traveling right, the right rudder travels further than the left rudder. Opposite when traveling left. Since they are Y'd, just live with it? Was going to CG about 10mm aft of the mark, ailerons on a low rate(50% of high) to start, all else by book high rates. I'm using SMC 5300 HV's in the rear and center locations. Ferrite chokes on each ESC battery wire pairs. Relocated the UBEC to rear wing root pocket to empty front bay for an AR637T (its antenna's at 90 degrees to each other) with a SRXL2 remote all the way into the nose. Will do extensive range testing at the field. Debating about 1-2mm of reflex in the ailerons and flaps for the maiden. Anything else to consider?
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My opinion is if you have TV you should be okay with that balance, maybe even a bit further aft, and set up. If not I'd recommend no more than 10mm behind the marks. Rudders are no issue. I would recommend the reflex at some point, it made a big difference in the horizontal stab neutral position. All this is for your first flights. After that adjust to suit your desires.
Good luck with the maiden.
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Originally posted by Evan D View PostMy opinion is if you have TV you should be okay with that balance, maybe even a bit further aft, and set up. If not I'd recommend no more than 10mm behind the marks. Rudders are no issue. I would recommend the reflex at some point, it made a big difference in the horizontal stab neutral position.
Good luck with the maiden.
I eventually lost my MiG because I didn’t install TV. It is not a matter of “if” but “when”.
No TV and no plans to install TV? Then don’t fly on windy/gusty days and don’t fly when there are thermal gusts.
All it takes is a gust to throw you into high alpha lock close to the ground and she’ll eat dirt. Without TV, it takes altitude and chopping the throttle to recover from alpha lock.
I loved my MiG! She flew GREAT! Flew her several thousand times. However, she is now a pile of mangled foam that I dig through for spare parts.
-GG
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Originally posted by jtconte View PostI forgot to say I do not have Thrust Vectoring. Didn't get to that point in the thread before I ordered the non-TV version. I may have to avoid one of my flying fields as it often has thermal stuff happening at either end of the runway. Thanks for the tips!
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Originally posted by xviper View PostThe thrust vectoring is primarily to get out of "alpha lock". If you don't fly that way, you don't need to worry about it. Thermals isn't the problem. It's flying too slow in high alpha and the plane doesn't have enough punch to fly out of it. The vector nozzles helps to get the plane out of that high alpha attitude so it can begin to increase airspeed more effectively.
The gust (thermal or otherwise) instantly increased the effective angle of attack (no fuselage pitch change) which put the MiG into alpha lock. Recovery was initiated by moving the throttle to zero and waiting for the nose to fall down. Two times I had the altitude, but the entry into alpha lock was a surprise. Thus, my precaution about thermal induced gusts….sharp edge gusts of any type are problematic.
The third, last and fatal time was on base leg on a windy/gusty day. I was fairly far out, so had added power to speed up and flatten the approach. I was moving along at a good clip. A gust hit her and did pitch the nose up a little, but the effective angle of attack was pushed beyond the critical angle of attack for alpha lock. Instantly recognized by the feel/response ( or lack of). Recovery was attempted, but she was too low.
When I fly full scale sailplanes and power planes, thermals on approach can be a gusty and a significant challenge. The stall warning will sometimes make an instant beep due to the instantaneous increase in effective angle of attack caused by the thermal winds (no pitch change may be noted).
For the MiG, an instantaneous increase in the effective angle of attack may be all she wrote, if you are down low.
Bottom line, without TV to help recover…gusts are not friendly for the MiG…linear wind gusts or thermal induced gusts. Since rising thermal air has an upward motion component, it tends to act in a way that will instantaneously increase the effective angle of attack (see my definition below).
-GG
Definition of effective angle of attack = The actual angle of attack at any instant between the chord line and relative wind. This may instantly be changed by directional gusts. Pilot Operating Handbooks suggest carrying extra airspeed in windy/gusty conditions. This extra airspeed reduces the effective angle of attack (do the trigonometric resolution of the vectors).
Flying slow increases both the angle of attack and exacerbates any instantaneous changes in the effective angle of attack, so slow flight on a gusty (linear or thermal gusty) day is not a good idea, for sure.
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GG- thanks for all the detailed information. I was not planning on TV since I know little about it. Normally it’s used for aerobatics and not for landing but it sounds like this model needs to have it on all the time just in case?
To be honest, I liked the paint scheme of the TV version Motion offered more but was intimidated by the TV. Feeling disappointed.
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Originally posted by jtconte View PostGG- thanks for all the detailed information. I was not planning on TV since I know little about it. Normally it’s used for aerobatics and not for landing but it sounds like this model needs to have it on all the time just in case?
To be honest, I liked the paint scheme of the TV version Motion offered more but was intimidated by the TV. Feeling disappointed.
Keep it in perspective! On over 2000 flights, she got into alpha lock a very few times.
You can order the TV kit, but you need a radio with more than 6 channels to use it.
I VERY MUCH enjoyed flying the MiG.
-GG
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