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Dodgy Crasher
I can see this in my mystic ball as being the next build I need to get on with, was gonna build another V4 but if this is better then it's not really a big decision ðŸ˜ðŸ‘
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roonilwazlib
Yes I know it's the V4 instructions but I just looked at both plans and there is not a whole lot of difference, hope this helps.


Thank you for posting this, very helpful
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roonilwazlib
Finished my first plane in quick/rough manner, as a complete beginner having only flown small toy rc planes around a few times, this flew pretty well. At first the plane wanted to high alpha all the time so i pushed the battery more forward and this seems to have fixed the issue as long as the speed is kept up a little. Had 2 crashes today, first one the control horn came loose from the elevon and i managed to slow it down and stall land it from about 15ft up, only real damage was the propeller tip breaking and a few small creases in the foam from the one wing hitting first. The mistake i made here was using hot glue instead of gorilla/epoxy. After i fixed that i ran into a similar issue and had a du-bro nylon kwik link pop off the servo with another crash this time without any further visible damage. Is there a way to secure these so they dont pop off, would a 4 inch cable tie be able to go around and use a little hot glue to secure it so it doesn't pop open again? Or does anyone know of any that are more secure that i could order?
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Sidewayskiwi
Finished my first plane in quick/rough manner, as a complete beginner having only flown small toy rc planes around a few times, this flew pretty well. At first the plane wanted to high alpha all the time so i pushed the battery more forward and this seems to have fixed the issue as long as the speed is kept up a little. Had 2 crashes today, first one the control horn came loose from the elevon and i managed to slow it down and stall land it from about 15ft up, only real damage was the propeller tip breaking and a few small creases in the foam from the one wing hitting first. The mistake i made here was using hot glue instead of gorilla/epoxy. After i fixed that i ran into a similar issue and had a du-bro nylon kwik link pop off the servo with another crash this time without any further visible damage. Is there a way to secure these so they dont pop off, would a 4 inch cable tie be able to go around and use a little hot glue to secure it so it doesn't pop open again? Or does anyone know of any that are more secure that i could order?

From my use of the kwik link (if its the ones iam thinking of) is they have to pivot a little to maintain a good angle 
a spot of superglue on the rubber clip where the metal fitting pokes through --but ive never had one pop off
Control horns used to pull out being plastic -- 
I  dont have that problem now i changed to FliteTest plywood control horns with hotglue they absolutely do no not move --and theyre cheap as chips $5 for 20 
Keep Flyin To Keep Learning
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roonilwazlib

From my use of the kwik link (if its the ones iam thinking of) is they have to pivot a little to maintain a good angle 
a spot of superglue on the rubber clip where the metal fitting pokes through --but ive never had one pop off
Control horns used to pull out being plastic -- 
I  dont have that problem now i changed to FliteTest plywood control horns with hotglue they absolutely do no not move --and theyre cheap as chips $5 for 20 
Keep Flyin To Keep Learning


I think i will get some of those control horns, the kwik links i have now are all nylon with only a small nylon ball at the end that is suppose to keep them closed, come to think of it i never checked them after the first crash which is probably when it popped open or loosed up, i will try a little super glue on the end that should work.


Here is a video of my first loop ever,my brother was impressed because like i said i am a complete beginner to rc airplanes ,
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Sidewayskiwi


I think i will get some of those control horns, the kwik links i have now are all nylon with only a small nylon ball at the end that is suppose to keep them closed, come to think of it i never checked them after the first crash which is probably when it popped open or loosed up, i will try a little super glue on the end that should work.


Here is a video of my first loop ever,my brother was impressed because like i said i am a complete beginner to rc airplanes ,

Ah those type--toss them all out 
either do a Zee bend or get the metal kwik locs that use an allen screw to lock the control rod going through ( iwill find some and send a pic of what to get if you want to keep using) 
also from your earlier post the canards produce a lot of lift for their size giving the appearance of tail heavy 
All my 4 SU34's i ran nose heavy and they loved it 
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Sidewayskiwi
Here's the kwik links I use first pic
And my SU34 that's got over 50 flights on it now 
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roonilwazlib
Got those issues fixed up, been flying great!!! This really is a great trainer platform on elevons only and really affordable as well. I used dollar tree foam and even with those couple crashes it is holding up very well, i also did not use a carbon rod for this plane just a regular wooden dowel that was $.75 usd. The whole air frame cost about $5usd to make. Looking forward to joining my local rc airplane club soon!!!

The cost breakdown for the curious:

$10 for plans
$5 for airframe-- 4 sheets of dollar tree foam + wooden dowel
$59 for flysky transmitter/receiver -amazon
$8 for servos - amazon
$4 for motor -
$2 for prop- amazon
$18 for RC Electric Parts 30 amp esc - amazon
$20 for 2200 3s lipo - amazon
Clear Gorilla glue $6 -amazon
Strapping tape $6 -amazon

So about $138USD which is a fairly amazing value, i have already started building more planes have an su-35 v5 nearly done.

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Sidewayskiwi
good to hear
fly often and learn as much as you can
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roonilwazlib
Just finished building my second plane and have a small yaw problem with this one, the plane wiggles in the yaw axis a little and i dont know where to start to troubleshoot this. The wiggle does not build up and the plane flies relatively fine except this wobble which occurs every 5 seconds or so during level flight. I am flying elevon only and dont have rudder/alieron servos. Could it be a vertical stabilizer issue or perhaps a cg problem?

The White plane is the current one with issues it is the (v5 su-35) the black one (su-34 v5) flew fine until i crashed it into stadium lights today lol lipo was smashed on the bottom, i cut the damaged section out and reglued so hopefully that will fly good tommorow. But the white one is the yaw problem plane.
IMG_9633.jpg
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Wildthing
Just finished building my second plane and have a small yaw problem with this one, the plane wiggles in the yaw axis a little and i dont know where to start to troubleshoot this. The wiggle does not build up and the plane flies relatively fine except this wobble which occurs every 5 seconds or so during level flight. I am flying elevon only and dont have rudder/alieron servos. Could it be a vertical stabilizer issue or perhaps a cg problem?

The White plane is the current one with issues it is the (v5 su-35) the black one (su-34 v5) flew fine until i crashed it into stadium lights today lol lipo was smashed on the bottom, i cut the damaged section out and reglued so hopefully that will fly good tommorow. But the white one is the yaw problem plane.
IMG_9633.jpg


If nothing is loose I would almost suspect something mechanical like a twitchy servo or even maybe a bad connection. 
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Dodgy Crasher
Yup I agree with wildthing, something loose is the first thing to look at, I overdrilled my control horns on a plane a few years back and suffered similar problems, the plane would just move about for no reason on a flat calm airless day, so basically I could wiggle the ailerons about 5-6mm without disturbing the servo.
And as wildthing said a servo twitching under load is a real possibility.
If it's a balance thing check the centre of gravity with a lipo in and adjust to suit, i'd usually say at this point make sure the lipos are the same weight as graphines are way heavier than normal lipos and are roughly the same size, but such is the forgiveness of these rc powers planes you can get away with a lot of balance issues, slightly nose heavy or indeed tail heavy which is normally equals a crash in fine balanced warbirds , your rcp Sukhoi will just suck that up.
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