New Composite ARF SU27
08-31-2016, 12:56 PM
#56
Join Date: Mar 2007
Location: Australia
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I have seen one of these models fly here in Australia, and it's a breathtaking model, I would however not fly one with leading edge slats, as I have witnessed a leading edge slat de laminate and almost result in the total loss of an airframe.
The aircraft in question has had new wings sent out from CARF with the slats deleted, as in Moulded in.
its a pity that the R and D on the airframe was insufficient to find the fault, and the responsibility fell on the shoulders of a client to do it.
the pilot in question has an impeccable record with Rc jets. The fact that he was able to bring the aircraft back was astounding, as everytimevthe failed slat moved, it effectively changed the wing type, in effect, reversing the servo constantly.so it was a hands on, brain on job. Anyone else on the controls down under would have lost the model.
you have been warned.
The aircraft in question has had new wings sent out from CARF with the slats deleted, as in Moulded in.
its a pity that the R and D on the airframe was insufficient to find the fault, and the responsibility fell on the shoulders of a client to do it.
the pilot in question has an impeccable record with Rc jets. The fact that he was able to bring the aircraft back was astounding, as everytimevthe failed slat moved, it effectively changed the wing type, in effect, reversing the servo constantly.so it was a hands on, brain on job. Anyone else on the controls down under would have lost the model.
you have been warned.
08-31-2016, 02:20 PM
#57
I have seen one of these models fly here in Australia, and it's a breathtaking model, I would however not fly one with leading edge slats, as I have witnessed a leading edge slat de laminate and almost result in the total loss of an airframe.
The aircraft in question has had new wings sent out from CARF with the slats deleted, as in Moulded in.
its a pity that the R and D on the airframe was insufficient to find the fault, and the responsibility fell on the shoulders of a client to do it.
the pilot in question has an impeccable record with Rc jets. The fact that he was able to bring the aircraft back was astounding, as everytimevthe failed slat moved, it effectively changed the wing type, in effect, reversing the servo constantly.so it was a hands on, brain on job. Anyone else on the controls down under would have lost the model.
you have been warned.
The aircraft in question has had new wings sent out from CARF with the slats deleted, as in Moulded in.
its a pity that the R and D on the airframe was insufficient to find the fault, and the responsibility fell on the shoulders of a client to do it.
the pilot in question has an impeccable record with Rc jets. The fact that he was able to bring the aircraft back was astounding, as everytimevthe failed slat moved, it effectively changed the wing type, in effect, reversing the servo constantly.so it was a hands on, brain on job. Anyone else on the controls down under would have lost the model.
you have been warned.
what jet was that?
08-31-2016, 04:23 PM
#60
WOW!!!!, Bajajet .... no **** on the fourth flight the slats had a failure.....do you know if they were performing maneuvers with slats on or was it just on landing?
I have a friend that said the same thing about the skymaster 1:5 f-16's.....that the slats ripped off during high speed passes...Skymaster even came out with a mod to fix the problem...
When you said that they got new wings with the slats removed do you know what Comp Arf said to them when receiving the new wings..and about the problem?
Thanks a million for the hot tip....will look into that further and discuss this more in detail with u.
09-01-2016, 10:05 AM
#67
It's only fair that I post this, its Comp-Arf responce to the incident that occurred with the Australian teams SU-27...I have high regards towards Comp Arf and thier team in responding to my concerns.
Dear Jose,
even the owner himself does not know what might have caused this to happen. I personally am flying my airplane with even only one servo on the slat and never had a single issue. With dual servos there is absolutely no way that this can happen unless a linakage would fail, accidentally not be connnected, servos running asyncron, or whatever. As you know, the slat has even a lock pin in the root area so that it would never be able to fail all the way. It has been a totally isolated incidence. We tried to analyze this very seriously but we are at total loss of what has happened. We come to the conclusion that it must have been some un-noticed servo or linkage or programming issue.*
There is no failure potential or even the slightest risk of failure if servos and linkages are installed properly. Nothing is pointing towards anything to be modified, reinforced, changed….
Keep in mind if you have a taileron servo failure the potential of your SU going in is way higher than that ever a slat would fail.*
You and any other SU-27 owner should not *be concerned at all. If there was the slightest issue we would have been professional enough to post our findings to anyone who owns an airplane. But there is nothing wrong with the design or structure.
Best regards
Andreas
Dear Jose,
even the owner himself does not know what might have caused this to happen. I personally am flying my airplane with even only one servo on the slat and never had a single issue. With dual servos there is absolutely no way that this can happen unless a linakage would fail, accidentally not be connnected, servos running asyncron, or whatever. As you know, the slat has even a lock pin in the root area so that it would never be able to fail all the way. It has been a totally isolated incidence. We tried to analyze this very seriously but we are at total loss of what has happened. We come to the conclusion that it must have been some un-noticed servo or linkage or programming issue.*
There is no failure potential or even the slightest risk of failure if servos and linkages are installed properly. Nothing is pointing towards anything to be modified, reinforced, changed….
Keep in mind if you have a taileron servo failure the potential of your SU going in is way higher than that ever a slat would fail.*
You and any other SU-27 owner should not *be concerned at all. If there was the slightest issue we would have been professional enough to post our findings to anyone who owns an airplane. But there is nothing wrong with the design or structure.
Best regards
Andreas
09-02-2016, 06:11 PM
#69
I'm going to run with cheetah's 160SE, which give 36lbs of thrust each...i have given thoughts about the thrust vectoring, but i want to stay light for the beginning couple of flights to get her down packed running on rails, before putting in the demon cortex gyro and start putting in weight, like lights, parachute, functional canopy and so on...
take lots of pictures to have the before and after album....
when is your's suppose to be arriving and whom did you purchase it from?
09-02-2016, 06:16 PM
#70
Hmm intersting I was thinking in a pair of 160's before maybe I have to reconsider it..
Mine arrives next week and I got it from the best CARF REP in South America.... ME !!!
I go a lot to Miami, maybe we can catch up some day
Mine arrives next week and I got it from the best CARF REP in South America.... ME !!!
I go a lot to Miami, maybe we can catch up some day
09-02-2016, 06:29 PM
#71
LOL you bum, didn't know you were a REP....DUUUHHHH , just saw the bottom of your messages....Take it your a rep for king tech too....i choose jet central cause of the warranty...always been a jet central guy.
I am so happy that Comp Arf decided to do an SU-27ub, and in this size...I'm even thinking of buying the one that comes to dreamworks rc in December and do the same camo but in the grey scheme version.
There are to many 16's 15's and sports jet out there...i'm probably going to get shot down now cause i said that, but it's the truth. i had the f-14 tomcat and it was a show stopper,,,,my thumbnail picture is my tomcat...but comp-arf did a brand new show plane with this su-27ub, the twin seater has always been the sexiest... in my opinion guys and not a fact..lol...beauty is in the eyes of the...... AHHH you know the rest!!...
Anyway, yes..swing by when you are in country....
I am so happy that Comp Arf decided to do an SU-27ub, and in this size...I'm even thinking of buying the one that comes to dreamworks rc in December and do the same camo but in the grey scheme version.
There are to many 16's 15's and sports jet out there...i'm probably going to get shot down now cause i said that, but it's the truth. i had the f-14 tomcat and it was a show stopper,,,,my thumbnail picture is my tomcat...but comp-arf did a brand new show plane with this su-27ub, the twin seater has always been the sexiest... in my opinion guys and not a fact..lol...beauty is in the eyes of the...... AHHH you know the rest!!...
Anyway, yes..swing by when you are in country....
09-03-2016, 07:45 AM
#72
Hheyyyyyy!! Leave some jets for the rest of us poor slobs!! I look forward to my next Lauderdale overnight so I can take a run down to see yours and take measurements. I think it will juuuuusssstt fit in my suburban, wings , fins , tail off,.....fingers crossed.
09-03-2016, 11:21 AM
#73
funny..lol, i just did that with a guy here locally that is also getting one...he has a nissan nv which gives him about 3 inches of clearance with the horizontal stabs in place...
she measures 58 inches across from stab to stab, 86 wing tip to tip...and 31 inches tall from lower fin to rudder...without the nose cone she is 106 and 97 without nose cone and tail cone.
fingers crossed...lol
09-03-2016, 12:09 PM
#74
DUUUUUDE,! You just answered my questions!! But the website says 126" long. So taking nose off and tail cone off will certainly help. I'm gonna fly out in a couple weeks but will message you first. Can't wait to see her. Next question is how much of a pita is it to take the tails off
Last edited by yeahbaby; 09-03-2016 at 12:13 PM.
09-03-2016, 02:08 PM
#75
DUUUUUDE,! You just answered my questions!! But the website says 126" long. So taking nose off and tail cone off will certainly help. I'm gonna fly out in a couple weeks but will message you first. Can't wait to see her. Next question is how much of a pita is it to take the tails off
well i love pita bread,,,specially in a gyro,,i go to Miami subs grill, which is the only place to get a good gyro fast...i'm kidding...lol...i know,..haahha
Anyway, the tail cone is going to be a difficult to remove due to the fact the it's held with 2 fasteners which bolt on from the inside near the exhaust nozzle,....so in order to get to it you would need to remove the nozzles, pipe on each side from the turbine mount and then you would have access to the fasteners. Now...everyone i know is doing the same thing to the tail cone, which is make it work for you....
for example: if you your in the field and for what ever the reason is, that you need to carry her off the field or in and out of a trailer. This particular tail cone is the only thing you got in picking her up from the back...and everyone's natural intention is to grab her from the tail cone....to remedy that, the tail area has a former about 1/4 inch thick, but the tail cone has no former's inside...in my case i'm going to install a hollowed carbon tube inside that rear former that will extend to the edge of the tail cone mounting area and in the tail itself make 2 former's and install another carbon tube with a smaller diameter to fit inside the the fuse, in in other words, like a main wing carbon spar.
Now what i am showing is for illustratiuon purposes only,,,,havent done any of the work in the tail cone area, the only thing you would add in your case would be a quick disconnect feature for transportation purposes,,,,i'm going to add a drag chute so the work for the pipe benefits me.