GP extra 300s build
04-21-2013, 03:29 PM
#51
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RE: GP extra 300s build
ORIGINAL: DGrant
The horizontal stab broke due to flutter... about 1'' out, both sides at same time. It was the leading edge that failed.. I'm sure. Upon breaking, the stab(both sides) just folded back, creating a yard dart. It happened very quickly.. and yes.. I'm sure I was hammering on the throttle, the plane was/is pretty fast when flown as such. It happened so quickly I didn't realize why the plane went down. I actually picked up all the pieces, bagged them and took them home to my garage and did an NTSB type of investigation, spreading the pieces out/around in order on the garage floor..
When I got to the rear empenage, I noticed the hor.stabs were folded back... hmm.. interesting I said.. for a plane that upon crashing everything went forward.. the stabs were folded back. As I further inspected, I was able to simply kind of snap them back into position(as much as one can when its already destroyed).... still attached by wood splinters and covering... and as I ''unfolded'' them, it all just sort of fell back into place(again..as much as something can that was destroyed).. In my mind, thats the only thing that brought that plane down that day.. everything was operating as it should... and I was wringing it out about that point.. as it had only about 10 flights on it. I did what any true modeler would do though... I ordered another identical kit that day.. and built the second one in a few weeks time.
The engine and the front of the plane was disintegrated.. and it left about a 4'' hole in the hard ground. A few servos were broke.. I don't think I used anything from that first Extra, other then the lesson I learned the hard way..
I'm not going to say this plane needs them if built per plans and specs engine wise.. I would say this plane needs something like that if ''up engined'' for sure. As I mentioned though, my second Extra(even covered identical to the first one) is still with me, after 12yrs... and probably a few hundred flights.. its a well flown plane.
I think you're doing fine, and will have a nice plane when said and done.. you're doing your homework.. can't go wrong there.. have a great day.
The horizontal stab broke due to flutter... about 1'' out, both sides at same time. It was the leading edge that failed.. I'm sure. Upon breaking, the stab(both sides) just folded back, creating a yard dart. It happened very quickly.. and yes.. I'm sure I was hammering on the throttle, the plane was/is pretty fast when flown as such. It happened so quickly I didn't realize why the plane went down. I actually picked up all the pieces, bagged them and took them home to my garage and did an NTSB type of investigation, spreading the pieces out/around in order on the garage floor..
When I got to the rear empenage, I noticed the hor.stabs were folded back... hmm.. interesting I said.. for a plane that upon crashing everything went forward.. the stabs were folded back. As I further inspected, I was able to simply kind of snap them back into position(as much as one can when its already destroyed).... still attached by wood splinters and covering... and as I ''unfolded'' them, it all just sort of fell back into place(again..as much as something can that was destroyed).. In my mind, thats the only thing that brought that plane down that day.. everything was operating as it should... and I was wringing it out about that point.. as it had only about 10 flights on it. I did what any true modeler would do though... I ordered another identical kit that day.. and built the second one in a few weeks time.
The engine and the front of the plane was disintegrated.. and it left about a 4'' hole in the hard ground. A few servos were broke.. I don't think I used anything from that first Extra, other then the lesson I learned the hard way..
I'm not going to say this plane needs them if built per plans and specs engine wise.. I would say this plane needs something like that if ''up engined'' for sure. As I mentioned though, my second Extra(even covered identical to the first one) is still with me, after 12yrs... and probably a few hundred flights.. its a well flown plane.
I think you're doing fine, and will have a nice plane when said and done.. you're doing your homework.. can't go wrong there.. have a great day.
04-24-2013, 08:14 PM
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RE: GP extra 300s build
Im probably going to order a thunder tiger fs-75s ".75 four stroke" tomorrow, does that sound like a good engine choice?
04-25-2013, 06:49 AM
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RE: GP extra 300s build
ORIGINAL: mattnew
how much weight balances out the nose right now?
I think its a great choice as long as its not too heavy
how much weight balances out the nose right now?
I think its a great choice as long as its not too heavy
04-26-2013, 08:03 PM
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RE: GP extra 300s build
I think it should balance fairly close with that engine and plus, there is alot of room to move the battery and receiver around. Im going to order everything tomorrow. Now my next problem, what colors! I thinking about just going with something similar to whats on the box "red with a white stripe down the wing and fuse" because I stumped, I want to do something fairly simple but it has to look good, any ideas?
04-27-2013, 12:10 PM
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RE: GP extra 300s build
Its all ordered now! I did get the thunder tiger 4 stroke, I got futaba s3004's for elevator and ailerons and for rudder I got a futaba s3010 high torque servo. For colors I got insignia blue and dove grey, Im going to do something similar to this but without the redbull logo's. I was going to get ultracoat but I already have some insignia blue monokote and I wanted to order everything together and tower doesn't have ultracoat, I like both so i don't really care that much.
04-30-2013, 05:34 PM
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RE: GP extra 300s build
ORIGINAL: ken78cvx20
That's going to look great, I have this kit waiting its been nice following along on your build.Ken
That's going to look great, I have this kit waiting its been nice following along on your build.Ken
05-03-2013, 04:26 PM
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RE: GP extra 300s build
Hey T-max97, you are a very fast builder, I wish I could build that fast 
. BTW that Extra 300S is looking very good. Let us know how it flies. I have one like that NIB and need some motivation to start the buiding process.
. BTW that Extra 300S is looking very good. Let us know how it flies. I have one like that NIB and need some motivation to start the buiding process.
05-03-2013, 05:04 PM
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RE: GP extra 300s build
Thanks guys, It's only the second plane I've fully covered so I'm pretty happy with it so far. I don't know if I'm really a quick builder or not, I worked on it all day for several days when I first got it so I got alot done. I already asked this but that was before I stepped up to my big stik, do you guys think I could fly this on low rates If i'm comfortable flying a big stik .40 with Inverted flight, level rolls,stall turns ect? Im going to fly my super sportster .40 for the first time next time I get a chance,maybe after that if all goes well? I read a review of this plane written buy a guy that said he stepped up to this as a third plane after a big stik and was very comfortable flying it.
05-04-2013, 05:06 AM
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RE: GP extra 300s build
My preferance is four strokes. Glad you went that way. The power will make up the for the weight. I'm puting an OS 72 on mine. I didn't state the first Extra 300S I built was my third plane. It lands somewhat faster than a trainer or a stick. Fly it to the ground, it does not float. Your build and covering looks like a pro did it. You should feel proud. You did great work. I question the flying wires becasue the stock pushrods are 2-56 and should be 4-40. The first one I had Was destroyed because I stalled it in a rolling circle over trees after 4 years of abuse. I will upgrade the pushrods again. good luck
05-04-2013, 07:27 AM
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RE: GP extra 300s build
ORIGINAL: UltimateFlyer120
My preferance is four strokes. Glad you went that way. The power will make up the for the weight. I'm puting an OS 72 on mine. I didn't state the first Extra 300S I built was my third plane. It lands somewhat faster than a trainer or a stick. Fly it to the ground, it does not float. Your build and covering looks like a pro did it. You should feel proud. You did great work. I question the flying wires becasue the stock pushrods are 2-56 and should be 4-40. The first one I had Was destroyed because I stalled it in a rolling circle over trees after 4 years of abuse. I will upgrade the pushrods again. good luck
My preferance is four strokes. Glad you went that way. The power will make up the for the weight. I'm puting an OS 72 on mine. I didn't state the first Extra 300S I built was my third plane. It lands somewhat faster than a trainer or a stick. Fly it to the ground, it does not float. Your build and covering looks like a pro did it. You should feel proud. You did great work. I question the flying wires becasue the stock pushrods are 2-56 and should be 4-40. The first one I had Was destroyed because I stalled it in a rolling circle over trees after 4 years of abuse. I will upgrade the pushrods again. good luck
05-05-2013, 06:14 PM
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RE: GP extra 300s build
Just fly it and enjoy it then later put one of those key chain cams in they do pretty good for what they are.
Fly thethe super sportsterfirst then the extra. Lets see some pictures of your build she is looking sweet.
Ken
Fly thethe super sportsterfirst then the extra. Lets see some pictures of your build she is looking sweet.
Ken
05-06-2013, 12:39 PM
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RE: GP extra 300s build
Things where just going to good, I noticed that the vertical stab, fin what ever you wanna call it is slightly angled to the left as in pointed to the left a little (not leaning), I don't know how in the world it's like that, I measured and marked the center and there's really not much room for error but somehow it is slightly crooked, any chance it's like that to counter act the torque of the propeller? When looking at it from the front it's nearly straight but is a little off, It's not a whole lot, should I be concerned? I can take pictures but I highly doubt you could tell in them.
05-06-2013, 07:03 PM
#73
RE: GP extra 300s build
i'm not sure exactly what your trying to describe.did you glued the vertical straight up and down but twisted it somehow when settting it in the fuse and your looking at it from the front of the planeand see it off centerwhere it meets the fuse? ifso i would think adjusting the rudders trim when flying to counter act theoffsetverticalfin might only be a few clicks. another option less desireable would be to use a blade and cut the sides loose to reglue.....messy and maybe unnessasary.
take a picture fromatop veiw ,set up perfectly over the vertical/rudder and fuse so we may see the problem that way. if we can ,you may want to go ahead with the repair.
it's not in any planes design i ever built that the vertical is angled left. i hope you can leave it as is and enjoy flying her as is,she's looking great!!
take a picture fromatop veiw ,set up perfectly over the vertical/rudder and fuse so we may see the problem that way. if we can ,you may want to go ahead with the repair.
it's not in any planes design i ever built that the vertical is angled left. i hope you can leave it as is and enjoy flying her as is,she's looking great!!
05-06-2013, 07:11 PM
#74
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RE: GP extra 300s build
It's like that to make the airplane turn just a little to the right to keep the control lines tight. Just kidding, but that's what we used to do with control line planes to keep the plane to the outside of the circle and the lines tight and effective. On your plane, a slight rudder trim adjustment will compensate for the slight misalignment of the vertical stab. Not a big deal! Earlier you expressed some concern with flying the Extra. May I suggest that you get Peter or one of the other "GOOD" Taildragger pilots to help you on the maiden flight. Someone to trim out the plane for you before you grab the sticks will help on your move up in performance planes. Some times a GOOD co-pilot helps with the jitters. Just a thought. BTY, the plane looks good, nice covering job. If in doubt, get help and save the plane. That's what club mates are for. Don't have just anyone fly it for you, be selective. Ask "K.C." about the guy that flew one of his planes"for him" and put it thru the roof at the storage units! I had just 3 wks earlier soloed that guy on his trainer! Get GOOD help. Tailwinds to you, 52larry52
05-06-2013, 09:53 PM
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RE: GP extra 300s build
ORIGINAL: 52larry52
It's like that to make the airplane turn just a little to the right to keep the control lines tight. Just kidding, but that's what we used to do with control line planes to keep the plane to the outside of the circle and the lines tight and effective. On your plane, a slight rudder trim adjustment will compensate for the slight misalignment of the vertical stab. Not a big deal! Earlier you expressed some concern with flying the Extra. May I suggest that you get Peter or one of the other ''GOOD'' Taildragger pilots to help you on the maiden flight. Someone to trim out the plane for you before you grab the sticks will help on your move up in performance planes. Some times a GOOD co-pilot helps with the jitters. Just a thought. BTY, the plane looks good, nice covering job. If in doubt, get help and save the plane. That's what club mates are for. Don't have just anyone fly it for you, be selective. Ask ''K.C.'' about the guy that flew one of his planes''for him'' and put it thru the roof at the storage units! I had just 3 wks earlier soloed that guy on his trainer! Get GOOD help. Tailwinds to you, 52larry52
It's like that to make the airplane turn just a little to the right to keep the control lines tight. Just kidding, but that's what we used to do with control line planes to keep the plane to the outside of the circle and the lines tight and effective. On your plane, a slight rudder trim adjustment will compensate for the slight misalignment of the vertical stab. Not a big deal! Earlier you expressed some concern with flying the Extra. May I suggest that you get Peter or one of the other ''GOOD'' Taildragger pilots to help you on the maiden flight. Someone to trim out the plane for you before you grab the sticks will help on your move up in performance planes. Some times a GOOD co-pilot helps with the jitters. Just a thought. BTY, the plane looks good, nice covering job. If in doubt, get help and save the plane. That's what club mates are for. Don't have just anyone fly it for you, be selective. Ask ''K.C.'' about the guy that flew one of his planes''for him'' and put it thru the roof at the storage units! I had just 3 wks earlier soloed that guy on his trainer! Get GOOD help. Tailwinds to you, 52larry52