Yellow Aircraft F-22 ARF Assembly Thread
03-27-2011, 10:22 PM
#151
RE: Yellow Aircraft F-22 ARF Assembly Thread
ORIGINAL: YellowAircraft
Barry,
Nice! Hey, is it my imagination, or an optical illusion? Look at the fins at about 3:00 into the vid. Are the rudders shaking that much in flight?
Barry,
Nice! Hey, is it my imagination, or an optical illusion? Look at the fins at about 3:00 into the vid. Are the rudders shaking that much in flight?
Barry
03-28-2011, 09:21 AM
#154
RE: Yellow Aircraft F-22 ARF Assembly Thread
Hey Shaun,
You can do some really silly ***** with those VT nozzles! I love it! Looks like alot of fun. Nice landing on the second flight.
Craig.
You can do some really silly ***** with those VT nozzles! I love it! Looks like alot of fun. Nice landing on the second flight.
Craig.
03-29-2011, 03:00 PM
#155
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RE: Yellow Aircraft F-22 ARF Assembly Thread
I noticed the rudder waving at me also in that vid ...... Its really the one obvious potential weak link I and others have also found.
FYI ~ Barry the rudder on the FB F-22 does need seriously strong servos and linkages and 'if' flutter does occur it is generally quite severe and can potentially cause total fin failure. Solution is HD Digi metal gear servos, quality metal HD linkage and HD composite or metal control horns. I had dual rudder failure and separation on my one occur at moderate speed using HD nylon horns and a 32 lb. thrust turbine. Got it down ok but a tad worrying at the time..... My one flies excellent now and on tailerons alone for primary flight controls. Rudders and vert fins (non removable) now permanently fixed in place with Hysol. I know AMA require rudders so above solution would my recommendation, but still would glue fins permanently just incase of rudder failure that could save you..... still keep an eye on fin strength integredidy regardless thats a lot of thrust for this bird Ive seen em fly great with as little as 19-20 lb thrust.
Cheers- Marty
FYI ~ Barry the rudder on the FB F-22 does need seriously strong servos and linkages and 'if' flutter does occur it is generally quite severe and can potentially cause total fin failure. Solution is HD Digi metal gear servos, quality metal HD linkage and HD composite or metal control horns. I had dual rudder failure and separation on my one occur at moderate speed using HD nylon horns and a 32 lb. thrust turbine. Got it down ok but a tad worrying at the time..... My one flies excellent now and on tailerons alone for primary flight controls. Rudders and vert fins (non removable) now permanently fixed in place with Hysol. I know AMA require rudders so above solution would my recommendation, but still would glue fins permanently just incase of rudder failure that could save you..... still keep an eye on fin strength integredidy regardless thats a lot of thrust for this bird Ive seen em fly great with as little as 19-20 lb thrust.
Cheers- Marty
03-30-2011, 08:55 PM
#156
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RE: Yellow Aircraft F-22 ARF Assembly Thread
So Shaun, what do you think of it overall? Any quirks we need to be aware of, I know Ron is getting anxious, He'll be even more inspired when he gets back from Toledo.
04-01-2011, 08:52 AM
#157
RE: Yellow Aircraft F-22 ARF Assembly Thread
I saw 2 minor building issues. 1. Reinforce the nose gear mount with some cf and hysol. 2. Soak the vert stab hinge plates with thin CA and use large hinges. Absolutely no flying issues with this jet...it's fast and lands slow. The best jet in my squadron by far.
04-01-2011, 09:42 AM
#158
Thread Starter
RE: Yellow Aircraft F-22 ARF Assembly Thread
Hi,
I agree. My only personal gripes have to do with the gear doors. They're not structural issues, I just think that it wouldn't have taken a whole lot more effort to make molded gear doors and maybe a less flimsy door hinge on the mains. They've performed as advertized for the three flights I put on the bird, but I'm just not a big fan of 2-dimensional carbon doors. I prefer the 3-d doors like on the F-15.
I made the reinforcement on the nose gear plate per Tom's experience, and a few other reinforcements per my own experience (not necessarily with this airplane, but with the Y/A line in general). I think the customer will be very happy with this bird for a long time.
On a side note, I've never been a big fan of composite wings (frankly, I'm afraid of them) and prefer a sheeted foam core wing any day. These wings seem to be EXTREMELY well designed based upon the volumes of pics on RCU of the insides of composite wings (mostly post-mortem). The glue joints in there are legit, and the layout seems very smart.
From a practical standpoint, my biggest gripe is the way the stabs install at the field. You have to reach up inside there and slide a spacer over the shaft as it comes into the fuse, then slip the pivot arm over the shaft; and that's a PITA. The alternative would have been to design a stab bearing unit that incorporated an integral spacer and arm. I can't really see why we didn't do that, but whatever...
I agree. My only personal gripes have to do with the gear doors. They're not structural issues, I just think that it wouldn't have taken a whole lot more effort to make molded gear doors and maybe a less flimsy door hinge on the mains. They've performed as advertized for the three flights I put on the bird, but I'm just not a big fan of 2-dimensional carbon doors. I prefer the 3-d doors like on the F-15.
I made the reinforcement on the nose gear plate per Tom's experience, and a few other reinforcements per my own experience (not necessarily with this airplane, but with the Y/A line in general). I think the customer will be very happy with this bird for a long time.
On a side note, I've never been a big fan of composite wings (frankly, I'm afraid of them) and prefer a sheeted foam core wing any day. These wings seem to be EXTREMELY well designed based upon the volumes of pics on RCU of the insides of composite wings (mostly post-mortem). The glue joints in there are legit, and the layout seems very smart.
From a practical standpoint, my biggest gripe is the way the stabs install at the field. You have to reach up inside there and slide a spacer over the shaft as it comes into the fuse, then slip the pivot arm over the shaft; and that's a PITA. The alternative would have been to design a stab bearing unit that incorporated an integral spacer and arm. I can't really see why we didn't do that, but whatever...
04-01-2011, 10:16 AM
#159
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RE: Yellow Aircraft F-22 ARF Assembly Thread
Hi Shaun,
Not to beat a dead horse, but there is another thread on here that shows hoe a few of us (Dan in particular I think) have added extended plywood bracing down onto the main gear top door, to give the door some rigidity.
I will try to find the title of the thread, it was something like "Yellow CG F22" I'll try to search for it later and add it here for those that might be interested.
Now I have to decide if I want to change mine to VT!
Dave
Not to beat a dead horse, but there is another thread on here that shows hoe a few of us (Dan in particular I think) have added extended plywood bracing down onto the main gear top door, to give the door some rigidity.
I will try to find the title of the thread, it was something like "Yellow CG F22" I'll try to search for it later and add it here for those that might be interested.
Now I have to decide if I want to change mine to VT!
Dave
04-01-2011, 05:53 PM
#161
RE: Yellow Aircraft F-22 ARF Assembly Thread
aside from doing all the below mentioned items, you could also cut the rudder surface area in half or 1/4 etc. BVM does this on his Rafale to mitigate early flutter issues. simply glue the unused portion to the vertical fin. non-scale but functional.
great flight by the way. good looking airplane.
cheers
great flight by the way. good looking airplane.
cheers
ORIGINAL: JET FX
I noticed the rudder waving at me also in that vid ...... Its really the one obvious potential weak link I and others have also found.
FYI ~ Barry the rudder on the FB F-22 does need seriously strong servos and linkages and 'if' flutter does occur it is generally quite severe and can potentially cause total fin failure. Solution is HD Digi metal gear servos, quality metal HD linkage and HD composite or metal control horns. I had dual rudder failure and separation on my one occur at moderate speed using HD nylon horns and a 32 lb. thrust turbine. Got it down ok but a tad worrying at the time..... My one flies excellent now and on tailerons alone for primary flight controls. Rudders and vert fins (non removable) now permanently fixed in place with Hysol. I know AMA require rudders so above solution would my recommendation, but still would glue fins permanently just incase of rudder failure that could save you..... still keep an eye on fin strength integredidy regardless thats a lot of thrust for this bird Ive seen em fly great with as little as 19-20 lb thrust.
Cheers- Marty
I noticed the rudder waving at me also in that vid ...... Its really the one obvious potential weak link I and others have also found.
FYI ~ Barry the rudder on the FB F-22 does need seriously strong servos and linkages and 'if' flutter does occur it is generally quite severe and can potentially cause total fin failure. Solution is HD Digi metal gear servos, quality metal HD linkage and HD composite or metal control horns. I had dual rudder failure and separation on my one occur at moderate speed using HD nylon horns and a 32 lb. thrust turbine. Got it down ok but a tad worrying at the time..... My one flies excellent now and on tailerons alone for primary flight controls. Rudders and vert fins (non removable) now permanently fixed in place with Hysol. I know AMA require rudders so above solution would my recommendation, but still would glue fins permanently just incase of rudder failure that could save you..... still keep an eye on fin strength integredidy regardless thats a lot of thrust for this bird Ive seen em fly great with as little as 19-20 lb thrust.
Cheers- Marty
04-01-2011, 10:04 PM
#162
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RE: Yellow Aircraft F-22 ARF Assembly Thread
I think this is the thread Dave was referring to:
http://www.rcuniverse.com/forum/m_70..._9/key_/tm.htm
http://www.rcuniverse.com/forum/m_70..._9/key_/tm.htm
04-02-2011, 06:54 PM
#163
RE: Yellow Aircraft F-22 ARF Assembly Thread
ORIGINAL: yeahbaby
aside from doing all the below mentioned items, you could also cut the rudder surface area in half or 1/4 etc. BVM does this on his Rafale to mitigate early flutter issues. simply glue the unused portion to the vertical fin. non-scale but functional.
great flight by the way. good looking airplane.
cheers
aside from doing all the below mentioned items, you could also cut the rudder surface area in half or 1/4 etc. BVM does this on his Rafale to mitigate early flutter issues. simply glue the unused portion to the vertical fin. non-scale but functional.
great flight by the way. good looking airplane.
cheers
ORIGINAL: JET FX
I noticed the rudder waving at me also in that vid ...... Its really the one obvious potential weak link I and others have also found.
FYI ~ Barry the rudder on the FB F-22 does need seriously strong servos and linkages and 'if' flutter does occur it is generally quite severe and can potentially cause total fin failure. Solution is HD Digi metal gear servos, quality metal HD linkage and HD composite or metal control horns. I had dual rudder failure and separation on my one occur at moderate speed using HD nylon horns and a 32 lb. thrust turbine. Got it down ok but a tad worrying at the time..... My one flies excellent now and on tailerons alone for primary flight controls. Rudders and vert fins (non removable) now permanently fixed in place with Hysol. I know AMA require rudders so above solution would my recommendation, but still would glue fins permanently just incase of rudder failure that could save you..... still keep an eye on fin strength integredidy regardless thats a lot of thrust for this bird Ive seen em fly great with as little as 19-20 lb thrust.
Cheers- Marty
I noticed the rudder waving at me also in that vid ...... Its really the one obvious potential weak link I and others have also found.
FYI ~ Barry the rudder on the FB F-22 does need seriously strong servos and linkages and 'if' flutter does occur it is generally quite severe and can potentially cause total fin failure. Solution is HD Digi metal gear servos, quality metal HD linkage and HD composite or metal control horns. I had dual rudder failure and separation on my one occur at moderate speed using HD nylon horns and a 32 lb. thrust turbine. Got it down ok but a tad worrying at the time..... My one flies excellent now and on tailerons alone for primary flight controls. Rudders and vert fins (non removable) now permanently fixed in place with Hysol. I know AMA require rudders so above solution would my recommendation, but still would glue fins permanently just incase of rudder failure that could save you..... still keep an eye on fin strength integredidy regardless thats a lot of thrust for this bird Ive seen em fly great with as little as 19-20 lb thrust.
Cheers- Marty
1) moved clevis on the servo side one notch closer to the center
2) put a piece double sided foam tape between the servo and its cover to fill up that gap
Result, rudders are even tighter with mostly only gear slop of servo, hope this works!
Barry
04-02-2011, 07:15 PM
#164
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RE: Yellow Aircraft F-22 ARF Assembly Thread
Just for the data:
My rudders are still good, they have 8611a servos, swb arms,Sullivan Clevis and prolinks.
I also put 7 robart hinges (bigger than the ones that came in kit).
I think the weak point in my system is the control horn (stock).
Dave
My rudders are still good, they have 8611a servos, swb arms,Sullivan Clevis and prolinks.
I also put 7 robart hinges (bigger than the ones that came in kit).
I think the weak point in my system is the control horn (stock).
Dave
04-16-2011, 05:52 PM
#166
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RE: Yellow Aircraft F-22 ARF Assembly Thread
Hi all I am the guy that Shaun built the f22 for.Want to give a report on the jet, receiver the jet in it's original box with a wooden crate built around it.it was received in perfect shape.the quality of work is perfect.he built it to my specs.got to fly it myself today.my background is with flying a bvm king cat with a king tech k170.,a sky master f4 with a Titan.a sky master f18 with a kingteck k170. Carf ultra lightning with a king tech k 170.the f22 has a king tech k170 and it flys it well takes off on the 400' runway using about 250 ' of it . I had a club member fly it first (he's our chuck Yeager) after he checked it out for 2 flights another club member that is one of the top rc pilots in the country stoped by and he had a go with it and also flew it with the vectored thrust and he thought it was a great jet too.so by the time I got to fly it I new that not only Shaun had flown it and our " chuck Yeager" and one of the top rc pilots in the country had it dialed in.all I can say is if I didn't know it was a f 22 it flies like my bvm kingcat.rock solid in the turns ,great vertical,rolls great,lands slow,and most of all it looks scale and is just plane fun to fly!
04-17-2011, 03:39 AM
#168
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RE: Yellow Aircraft F-22 ARF Assembly Thread
If anyone is going to be in the Shreveport area May 8th and 9th, he F-22( full scale) will be flying a demo at the Barksdale airshow.
Kevin
Kevin
04-19-2011, 10:33 AM
#169
RE: Yellow Aircraft F-22 ARF Assembly Thread
Dear Shaun:
I am intrested in your Y/A F-22 vector nozzle.If I can buy this vector nozzle kit from you? How much is this kit?(I want to purchase 3 sets of this nozzles).Besides,dose this nozzle need special exhausted pipes to accompany it? Thanks for your answer.
I am intrested in your Y/A F-22 vector nozzle.If I can buy this vector nozzle kit from you? How much is this kit?(I want to purchase 3 sets of this nozzles).Besides,dose this nozzle need special exhausted pipes to accompany it? Thanks for your answer.
04-19-2011, 02:28 PM
#170
Thread Starter
RE: Yellow Aircraft F-22 ARF Assembly Thread
Hi,
Yes, Tony, the VT nozzles are available. They are $350, and they do require a shortened pipe. Those are also $350.
Thanks!
Yes, Tony, the VT nozzles are available. They are $350, and they do require a shortened pipe. Those are also $350.
Thanks!
09-16-2011, 01:10 AM
#173
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RE: Yellow Aircraft F-22 ARF Assembly Thread
Hi Shaun:
I am impressive to your Vector nozzle flight,it is amazing!!According to the picture of your vector nozzle,it seem to a little "weak".
Can it stand the strong 17 kg thrust?Are this vector nozzle available?How can I order it from you?
I am impressive to your Vector nozzle flight,it is amazing!!According to the picture of your vector nozzle,it seem to a little "weak".
Can it stand the strong 17 kg thrust?Are this vector nozzle available?How can I order it from you?
09-16-2011, 06:35 AM
#174
Thread Starter
RE: Yellow Aircraft F-22 ARF Assembly Thread
Hi,
You can order via email, or however you like. Email me your shipping address for a start so I can get you a postage quote. As for them being 'weak', I don't know what you're looking at that's giving you that impression, but the only flight-experience I have with them is with an engine rated at roughly 17kg of thrust, and they are rock-solid.
You can order via email, or however you like. Email me your shipping address for a start so I can get you a postage quote. As for them being 'weak', I don't know what you're looking at that's giving you that impression, but the only flight-experience I have with them is with an engine rated at roughly 17kg of thrust, and they are rock-solid.