H-9 Su-31
#1
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Any flight reports out there? I have mine ready for test flight and wondering what to expect. Didn't weigh it, nothing I could do except surgery to get the weight down. The only surprise is I had to add 20 oz weight to the nose to get it to balance. GT-80 equipped.
Tom Perry
Tom Perry
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From: White Lake,
MI,
I ran into noise problems on Sat which kept mine grounded. All up weight was 23# with a BME102. I moved the rudder servo to a pull pull system under the canopy (Hitec 5735 Dig) and balanced fairly close. Batteries are mounted on the wingtube so in worst case could move foward. G'luck with your first flight.
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From: Lakeland,
FL
I just finished my SUKOI with a BME 102,with batteries all the way up front the balance is perfect with no added weight. Hope to test fly this weekend. Has anyone tried the JR Matchbox for the dual servo control surfaces? Is it really needed ?
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From: Riverside,
CA
Barnstomer,
Is your plane built per plans? Did you install the rudder servos(two) in the rear of the fuse as the plans call for or did you use pull pull with a single servo?
Is your plane built per plans? Did you install the rudder servos(two) in the rear of the fuse as the plans call for or did you use pull pull with a single servo?
#5
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Flew two times this morning. What a great plane. Takeoff was dead straight, two clicks ail trim, one click evevator and 1 rudder was all it took. Acro is effortless. Not a 3d type of guy (yet) but it hovered very well (high altitude). Stalls very slow and straight ahead. Landing were very slow 3 pointers. I'm going to like it. Balance was on the center of the wing tube - dont know what it weights. Added 20oz lead to nose to get it to balance.
Tom Perry
Tom Perry
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From: Thunder Bay,
ON, CANADA
ordered one today, is a zdz 80 a good choice or will I have to add nose weight? How about a DA 100? Did you have to cut the cowl with any of your engine choices?
#7
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I originally planned on a ZDZ-80 (single). After getting the kit, I decided that I would have too much of the cylinder sticking out of the cowl. This thing is too nice to chop it up for the motor. The ZDZ-80 would also have required a lot of weight to balance. I finally selected the GT-80. It bolts on, uses the stock mufflers (really quiet) required nothing but cooling holes on the bottom of the cowl (fits totally in the cowl) and 20oz of weight to balance the model. Hovered at 3/4 throttle on the test flight. Plenty of power.
Tom Perry
Tom Perry
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From: Southeast PA.
Red Rover.....just finishing up one with a ZDZ 80 single in it. Cylinder fits totally in the cowl. The only thing that sticks out is the spark plug cap at the very bottom of the cowl. Depending on the muffler you choose, you might have to make a small smilie where the wrap around part of the pitts muffler touches the cowl. I'm using the Bisson muffler. Not sure about the balance yet. Gonna have to add some nose weight though.
tp777......with the GT-80, why did it need so much lead in the nose? I thought this plane was supposed to balance OK using the GT-80, supposedly Mike McConville's did with the batteries behind the wing tube.
King AIR...if you read this. How far back is the balance point that you can safely fly and land this plane? I don't mind tail heavy.....just want to be cautious on 1st flight.
tp777......with the GT-80, why did it need so much lead in the nose? I thought this plane was supposed to balance OK using the GT-80, supposedly Mike McConville's did with the batteries behind the wing tube.
King AIR...if you read this. How far back is the balance point that you can safely fly and land this plane? I don't mind tail heavy.....just want to be cautious on 1st flight.
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From: Waller,
TX,
I'm considering getting this plane but being a "Limited Edition" I'm concerned about getting replacement parts for it should I have a mishap after they stop making this plane. Any concerns out there?
#11
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From: Grapevine, TX
Mine has the ZDZ 80 single w/Bisson pitts muffler. Pull-pull on rudder using Hitec 5735 mounted about 3" behind the wing tube. All batteries (2- 6v and 1- 4.8v) mounted on top of the engine box (No RF problems). Still had to add 18 ozs of lead in nose of the cowl. Balances 3/4" behind the wing tube. All up weight is 23 1/2 lbs. Flies just fine with no bad habits due to c.g. location.
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From: Southeast PA.
Thanks King Air......just so I'm clear. Are you flying yours balanced 3/4" behind the recommended CG (center of wing tube) or 3/4" behind the wing tube itself?
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From: Grapevine, TX
Originally posted by Pilot24
Thanks King Air......just so I'm clear. Are you flying yours balanced 3/4" behind the recommended CG (center of wing tube) or 3/4" behind the wing tube itself?
Thanks King Air......just so I'm clear. Are you flying yours balanced 3/4" behind the recommended CG (center of wing tube) or 3/4" behind the wing tube itself?
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From: Wilsonville,
OR
Hi Three,
Don't worry about replacement parts for this plane or any other one H9 makes. "Limited Edition" is stricly a marketing gimick. They did the same thing for their 33% Cap and I guess it worked, so they're doing it again. You'll notice that H9's 25% and 33% Extra aren't being made anymore, but neither of those were marketed as "limited editions", and parts are readily available for both.
being a "Limited Edition" I'm concerned about getting replacement parts for it
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From: Monticello, IL
Guys,
The 1/3 scale H9 Sukhoi and Cap kits are limited. As with the Cap, they are gone (from Horizon) and there will not be any more kits made. There will still be replacement parts available though.
John Diniz
The 1/3 scale H9 Sukhoi and Cap kits are limited. As with the Cap, they are gone (from Horizon) and there will not be any more kits made. There will still be replacement parts available though.
John Diniz
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From: Wilsonville,
OR
I'll make you a wager that both the Extra, Cap and the Sukhoi will be back at some point, after their "limited edition" production run is gone. Maybe they'll have new paint schemes, slight improvements, whatever, and they'll probably call that a limited edition too. Believe me, it's strictly a marketing ploy and nothing else. It's an artificial way to limit supply so demand is increased so they can sell more kits in a controlled time period. I'm guessing it worked out well with the Cap or they wouldn't be using the same marketing plan with the Sukhoi.
#18

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I had a chance to test fly my new SUKOI today,plane fly's great after I got the balance right. I have a BME 102 engine installed and all the rudder and elevator servo's are in the tail per instructions from Hangar 9.Three 1800 mah battery packs are mounted behind the firewall. I still had to add over 3 lbs of lead to the nose to make the plane balance (this airplane realy fly's bad when tail heavy, I know from first hand experience). With the added lead my SUKOI is at 27 lbs. If I had to do it again I would probably move the rudder & elevator servo's forward ?
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From: Wilsonville,
OR
Thanks for the flight report Barnstormer425. I've been anxious to hear some feedback on it. I can't believe it needed that much counterweight. I've heard just about all Sukhois have this problem, but I thought H9 had worked it out. If I were you I'd change everything to pull-pull and try to get rid of the lead. 3 pounds is bound to affect the flight performance considerably.
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From:
I'am finishing up mine tonight. ZDZ80 with 2inch aluminum standoffs (homemade).Pull Pull put 2inches in front of wing tube side by side Hitec 5625's. CF Wing tube and CF tail gear. 2700 6.0V and 4.8 2000 all up in the nose. 2 standard JR 537's for choke and throttle mounted in top of engine box.
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From: Toms River,
NJ
Have you flown your sukoi yet, how did it balance and how were you able to move the engine two inches forward on stand offs and still have enough room for the cowl. What is the weight ready to fly less fuel? I just keep reading post after post the more I read the more confused I get. Seems like no two planes weigh the same or balance the same, some claim to have added 2lbs. or 3lbs. of weight. Thanks for any info you can give.
Mike
Mike
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From: Clayton,
NC
Seems like no two planes weigh the same or balance the same, some claim to have added 2lbs. or 3lbs. of weight
Doug
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From:
I have no problem putting on my cowl with very little cutting. I have a 4 1/2 inch ultimate spinner on. With everything that I did to the plane it is still tail heavy but not to the point of pitch unstable. The balance is about 1 1/2 inch behind the cg. In the air the plane is incredible I love where the balance is. I added no weight to the nose. While the other two guys added anywhere from 1 1/2 too 2 pounds in the nose. And one moved his wing back 1 1/2 inches. My all out weight is 24 1/2 pounds. The only problem I have with the plane is landing because it just floats so much. It flys incredible at slow speed.
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From:
Well guys I just got back from my first flight on the new Sukhoi. What a dream to fly!!! The plane tracked nice and landed like a dream. I balanced the plane with about 21 oz of weight in the nise. The engine I am using is a BME 102 with hitec digital 5945's and a jumbo on a pull/pull. I am going to remove some more lead next flight and add a little down thrust. With the 102 the weight is not an issue. I think the plane is a winner!!!


