PHOENIX SUKHOI BUILD AND FLIGHT!
#1
Thread Starter

My Feedback: (8)
Today I flew my sukhoi, three days to finish, well actually I only worked on it for 10 hours, but sitting on the PC and B.S.ing with the LHS owner took a lot of time away from the assembly of it. I made a few mods that are personal preferences but some should be done anyway, Fist off I weighed the parts and the plane came to just about 5Lbs. total, next I set aside all the stuff I didn't like and found suitable replacements for them, next I made the ply-wood parts that I felt it needed that it didn't include. The build is pretty fast and I don't need to get into details but the all the hardware, engine mount, wheels and tail wheel assembly were changed. I installed ply-wood plates in the wheelpants to stiffen them up to avoid damage to them rotating and increased the wheels to 2 3/4" light-flight wheels. In the wing assembly I added a 1/4 dowel to the root ribs near the end and epoxied it shut, next I wrapped the center section with 1 1/2" glass cloth and epoxied it down. The last ply-wood piece to be added was the bolt plate, I can't figure out why they didn't include one but I highly recommend adding it, the balsa trailing edge will crush if you don't do it. The engine was clocked at the 10 O'clock position so the pitts muffler would exit the center of the cowl( why does slim-line offsets the tubes?), changed the tank to 10 oz. GP and added the ez fueler, the tailwheel assembly had to go, I took a leaf from an old set-up and silver-soldered a wheel collar to it and set up the wire and horn with springs. The final mod was pull-pull on the rudder, ny-rod on the throttle and solid 2-56 wire with guide tube to the elevator. Somehow I managed to come out to 6Lbs. ready to fly, I guess the wheels, tank, pushrods and tailwheel assembly weigh a lot, about 6.5ozs.! I ended up replacing it with only 4.5 ozs.
Flight time! the plane required a little trim but nothing serious, I read the posts about the elevator and aileron being very sensitive but I was passive on the warnings. I should have listened, but even thou I found it a bit touchy I still felt comfortable at the sticks, just point and go like it's tracking on rails. The MDS .48 pulls it with authority and with the larger tank it has full 20 minute flights at 1/2 to 3/4 throttle. I think that I can slow it down a bit with a 11x5 instead of the 11x6 but still it has almost vertical performance on the 11x6.I found myself adding down elevator in the invert of the rolls just by habit but it doesn't need it, like the traditional sukhoi design she flies the same upside down as it does upright. Knife edge is O.K. but even with 1 1/2" deflection it required a lot of throttle play to get it right. Possibly moving the CG back will rectify the issue but for now I'll play with it where it is and do the dive, roll and loop, trim and CG checks. I know it's a lot to read but this plane gets the "Thumbs Up" award for biggest bang for the buck ARF out there! I, like many others, I only spent $85.00 for it and it looks and performs very well with outstanding quality to boot.
Flight time! the plane required a little trim but nothing serious, I read the posts about the elevator and aileron being very sensitive but I was passive on the warnings. I should have listened, but even thou I found it a bit touchy I still felt comfortable at the sticks, just point and go like it's tracking on rails. The MDS .48 pulls it with authority and with the larger tank it has full 20 minute flights at 1/2 to 3/4 throttle. I think that I can slow it down a bit with a 11x5 instead of the 11x6 but still it has almost vertical performance on the 11x6.I found myself adding down elevator in the invert of the rolls just by habit but it doesn't need it, like the traditional sukhoi design she flies the same upside down as it does upright. Knife edge is O.K. but even with 1 1/2" deflection it required a lot of throttle play to get it right. Possibly moving the CG back will rectify the issue but for now I'll play with it where it is and do the dive, roll and loop, trim and CG checks. I know it's a lot to read but this plane gets the "Thumbs Up" award for biggest bang for the buck ARF out there! I, like many others, I only spent $85.00 for it and it looks and performs very well with outstanding quality to boot.
#5
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Joined: Aug 2004
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From: Denistone EastNSW, AUSTRALIA
Just finished the same model, only took me 18 months... a few things got in the way!
As this is my first build in too many years, so I pretty much followed the instructions and installed what came in the box. I agree absolutely with your suggestion about the ply doublers on the wing bolts though. There seems to be a ply plate under the solarfilm, but on the wrong side. My cowl seems to be much bigger than your tough, making me wonder if I got the cowl from the bigger Phoenix kit by mistake.
First flight was last weekend. A touch of aileron trim and a touch of down trim and it flew very nicely with an OS 46 turning a 10x6. I'm adding some down thrust and side thrust to the compensate for this (none specified on the plan to my surprise - there is for the [very similar] Kyosho version of this kit). I had dual rates set up, which was just as well as it was pretty fast and I am very rusty. After landing I turned to my heck pilot and told him it was my first flight in 20 years - and I have converted from mode 2 to mode 1 in the process. Aren't PC simulators wonderful!
I would certainly recommend this kit as being reasonably well made and good fun to fly.
As this is my first build in too many years, so I pretty much followed the instructions and installed what came in the box. I agree absolutely with your suggestion about the ply doublers on the wing bolts though. There seems to be a ply plate under the solarfilm, but on the wrong side. My cowl seems to be much bigger than your tough, making me wonder if I got the cowl from the bigger Phoenix kit by mistake.
First flight was last weekend. A touch of aileron trim and a touch of down trim and it flew very nicely with an OS 46 turning a 10x6. I'm adding some down thrust and side thrust to the compensate for this (none specified on the plan to my surprise - there is for the [very similar] Kyosho version of this kit). I had dual rates set up, which was just as well as it was pretty fast and I am very rusty. After landing I turned to my heck pilot and told him it was my first flight in 20 years - and I have converted from mode 2 to mode 1 in the process. Aren't PC simulators wonderful!
I would certainly recommend this kit as being reasonably well made and good fun to fly.
#6
Senior Member
I was flying a BH one for a while and I will say that your Phoenix should be a lot better as the BH one is heavier. Try some washout on the ailerons, you will be surprised how slow she can come in ...



