RE: Anyone Flying the New Phoenix Models Sukhoi .46 From Tower Hobbies?  
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    • All Forums >> RC Airplanes >> ARF or RTF >> RE: Anyone Flying the New Phoenix Models Sukhoi .46 From Tower Hobbies?
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    RE: Anyone Flying the New Phoenix Models Sukhoi .46... - 6/9/2008 4:18:25 AM   
    Mr. Mugen



    Posts: 5539
    Joined: 3/24/2006
    From: Ishpeming, MI, USA
    Status: offline     		No vid. I added some down and right thrust. It made the difference of night and day.

    _____________________________

    Everything electronic runs on smoke.....if you let your smoke out, it''s dead! AMA#378033

    (in reply to OffroadBEAR)
           Post #: 476

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 6/9/2008 4:56:44 AM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		Mkay, thanks for the help man. Hopefully I will get to maiden mine within the next week or so (money and moreover, weather permitting, we've been having winds over 25 mph for the last two weeks, one break on friday of 15 mph so I headed out).

    (in reply to Mr. Mugen)
           Post #: 477

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 6/9/2008 5:13:56 AM   
    Mr. Mugen



    Posts: 5539
    Joined: 3/24/2006
    From: Ishpeming, MI, USA
    Status: offline     		I hear that....the wind has been crazy here too. We had a window today and missed the good part of it bs'ing about flying......go figure. It was one of my best landings ever while under power with any plane. It is now the flyer I had hoped it would be.

    _____________________________

    Everything electronic runs on smoke.....if you let your smoke out, it''s dead! AMA#378033

    (in reply to OffroadBEAR)
           Post #: 478

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 6/9/2008 9:08:49 PM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		sweet news man.

    (in reply to Mr. Mugen)
           Post #: 479

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/5/2008 12:18:23 AM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		Well, I finally got some money, so I got the rest of what I needed to complete the sukhoi (plus I got the receiver from my 4*60 after plowing it last weekend, it was sad). I got a Magnum XL-70-RFS to power it (with a 13x6 prop) and am using my Airtronics RDS8000 radio.



    I seem to not have any lead in the nose of my sukhoi thank god. With the magnum 70 FS (which is a little on the heavy side) 12 oz sullivan seamless tank and all the servos in, it balances still a little tail heavy. This is minus battery and cowl, so I am sure I can get it to balance at 100mm aft of LE by locating the battery in the right place.





    As far as radio setup, I am going with the manual's recommended throws for low rates and will probably dial in about 40% expo on all channels (no expo option on rudder though), but may go with more later. I have the high rates set up with about another +30% more throw and about 45% expo. We'll see how that works out. I am using Futaba S3151 servos on all but throttle, which is an old FP-S148 from my tanked 4*60.



    Still workin on the cowl, its a little rough, and I didn't think too much to muffler placement when I mounted the motor, so I will have to cut out a section to clear the muff on the right side. Oh well, at least I won't have to remove half the cowl for a 2 stroke muff. The valve cover on this thing is massive.

    Now, I ran out of supplies. I got the engine, tach, prop, glow plug, and after run oil, but forgot anything for throttle linkage, fuel dot, and as it turns out, my byrons fuel only has 16% oil content, so I need to buy some castor and mix it in. But the hobby shop is closed today, so I'll have to wait till tomorrow to supply up and run the engine in. Hopefully I will maiden it tomorrow afternoon or sunday. I will let you all know how that goes.

    (in reply to OffroadBEAR)
           Post #: 480

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/5/2008 3:06:25 AM   
    Mr. Mugen



    Posts: 5539
    Joined: 3/24/2006
    From: Ishpeming, MI, USA
    Status: offline     		You might want to send that rx in for inspection before flying it. I had 2 go bad from crashes and they didn't show any signs until airborne and under load.

    Kevin

    _____________________________

    Everything electronic runs on smoke.....if you let your smoke out, it''s dead! AMA#378033

    (in reply to OffroadBEAR)
           Post #: 481

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/5/2008 4:25:33 AM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		Yeah, I thought about that. I tested it after the crash to see if I could replicate a situation that would have caused my crash, and it worked just fine, but I guess you can never be too sure.

    (in reply to Mr. Mugen)
           Post #: 482

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/5/2008 5:11:37 AM   
    Mr. Mugen



    Posts: 5539
    Joined: 3/24/2006
    From: Ishpeming, MI, USA
    Status: offline     		Roger that. Mine was a crack in the green board that didn't rear it's ugly head til I was airborn. The other was a failsafe mode thing. It wanted to go into failsafe when knifeedging.(sp?). Weird for sure but preventable. Good luck.

    _____________________________

    Everything electronic runs on smoke.....if you let your smoke out, it''s dead! AMA#378033

    (in reply to OffroadBEAR)
           Post #: 483

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/5/2008 3:21:35 PM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		Thanks for the heads up. I guess I will crack mine open and check the board then before I fly. You fly 2.4GHz or FM? Did you end up loosing the planes or did you get em down?

    (in reply to Mr. Mugen)
           Post #: 484

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/5/2008 7:51:38 PM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		I opened the receiver up and checked for bad stuff (I have fried a few pieces of radio gear, so I know what to look for in general), and everything looked kosher. After getting my throttle set up, and finalizing the radio install, balancing at 100mm aft of TE with no dead weight, I am ready to go to the field and break in my new engine and possibly (if I can calm down enough) fly it for the first time.

    Now that its time to go to the field I am nervous as all hell (always happens to me before I make the first flight of an airplane, no matter what). I may or may not fly today just due to my nerves, but I may just say "screw it, you only live once," pucker and go.

    I also had to go buy a bottle of castor oil at walgreens to mix into the fuel, since what I have is only 16% oil, I want 18-20% oil, but the LHS only carries 16%. they have 30% nitro heli fuel with 23% lubricant, but IDK about running heli fuel in this motor, may try later with a quart bottle, $24/gallon for an unsure thing for me is not a good idea.

    I'll take some pics too. later all.

    (in reply to OffroadBEAR)
           Post #: 485

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/6/2008 12:25:51 AM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		Well, winds did not permit flying today, but I did break in the engine. Holy crap, this is a whole new world. Tuning is much easier than I expected (I ran super tigres before, which suck to tune). I got the full 45 minutes of suggested run time as per the manual. The Mag 70 FS hits hard, and if there were anything wrong with the receiver, it would have shown while being sucker punched by the 4 stroke. It will provide more than enough power for this plane, and balanced fine with no dead weight.

    The factory settings for the high and low speed needles were super rich, and it would not transition at all, but after leaning both out quite a bit, I started getting throttle response from it, although it would only idle down to like 2500. It seems like I need a hotter glow plug, but maybe I just need to lean it out even more (still have that white smoke). Me likey the 4-strokey! Out of the box, it came to life on the first hit of the starter, and every time after that. For the money, its a very nice engine, I need to fly it to tell you more, but for now, I have nothing but positive things to say about it.

    (in reply to OffroadBEAR)
           Post #: 486

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 7/6/2008 1:44:29 AM   
    Mr. Mugen



    Posts: 5539
    Joined: 3/24/2006
    From: Ishpeming, MI, USA
    Status: offline     		I got them both back safely.

    Today at the fly in my cowl came almost off (3 screws pulled out) and made for an interesting landing. It happened over the runway about 50 feet up and made all kinds of racket. I didn;t know what happened but the plane died and snapped faster than all get out. I ended up in a flat spin but managed to keep it level for the duration. It landed belly down in tall grass so nothing was hurt other than a badly broken cowl. I would suggest using threaded inserts for the cowl. The CA method is simply not enough......proven today.

    Kevin

    _____________________________

    Everything electronic runs on smoke.....if you let your smoke out, it''s dead! AMA#378033

    (in reply to OffroadBEAR)
           Post #: 487

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 9/1/2008 3:17:36 AM   
    OffroadBEAR



    Posts: 124
    Joined: 8/4/2005
    From: Wichita, KS, USA
    Status: offline     		Alright, I flew this thing tonight finally. It was much nicer than I expected. I have the mag 70 fs, which was idling a little high (about 3000 rpm), but ran great. I had it balanced at 100mm back from the LE at the wing root (fuselage), and went with book throws for the maiden. I need to check something because I needed a lot of left roll trim to level out, and about 3 clicks of up trim for level flight. I had 30% expo on the elevator and aileron, but I will be increasing it to 35 or 40%. I also found myself running out of elevator travel and hit the high rates for the second flight, which was about twice the manual's rates. With the mag 70, its got tons of power. Landing was pretty easy. It does have a tendency to tip stall if you get it too slow, but I had it slowed down a lot before it stalled and the dropped a wing. Luckily, it stalled and dropped the right wing about waist high on my last landing, just bending the gear, nothing else was hurt. It definitely needs to be flown all the way in, but slows down on final very nicely. Other than that, it is pretty smooth, very responsive, and an easy lander as long as you keep some speed on your final. If you try to cut the throttle before the base leg like a trainer, it will be stalled by the time it comes to land. Tomorrow, I will be doing a bunch of touch n goes and some aerobatics and report that here. I also think I could stand to have the cg back just a hair more, but not too much, it was pretty spot on. I also think the aileron throws in the book could be turned up with some expo added. More testing will tell. All in all, I am very pleased.

    I would definitely not recommend this as a second plane. As a third plane it would be fine, but it does require you to be on top of it at pretty much all times. Expo will help it be less twitchy, I wouldn't even consider flying this thing without it, it would be a real handful. So to those of you on a low wing trainer, if you're looking for a nice step up from something like a 4*60, this would be a good consideration, otherwise, look for something a little more docile.

    Paul

    (in reply to Mr. Mugen)
           Post #: 488

    RE: Anyone Flying the New Phoenix Models Sukhoi .4... - 9/1/2008 11:37:08 PM   
    Off