RE: Excelleron 90  
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    • All Forums >> RC Airplanes >> Pattern Flying >> RE: Excelleron 90
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    RE: Excelleron 90 - 8/19/2005 11:07:46 PM   
    JasonS


     

    Posts: 166
    Joined: 4/15/2002
    From: Omaha, NE, USA
    Status: offline
    quote:

    ORIGINAL: petec

    That would increase down thrust wouldn't it?


    Uhhhh. Duuuuhhhh.
    Yep! When the plane is on my bench - its inverted. DUHHHH.


    < Message edited by JasonS -- 8/19/2005 11:08:59 PM >

    _____________________________

    There is no such thing as too much time at the flying field!

    (in reply to petec)
           Post #: 576

    RE: Excelleron 90 - 8/19/2005 11:20:52 PM   
    GDAVIS



    Posts: 95
    Joined: 3/29/2003
    From: EDMOND, OK, USA
    Status: offline     		Jason,

    Remember the engine is inverted so washers under the front of the mount INCREASE down thrust. ( I had to think about that one myself ) My plane needed a lot of up elevator for level flight before I started trimming it out. I also added some positive incidence to wing. Elevator now is virtually neutral. Plane is very neutral on upright, inverted, up and down verticals and 45s now. Remember all planes are different. yours may not need all this. Also remember to change just one thing at a time. It took me a long time to figure out these changes.

    Greg

    _____________________________

    Greg D
    Email: egwdavis@cox.net

    (in reply to petec)
           Post #: 577

    RE: Excelleron 90 - 8/19/2005 11:36:59 PM   
    petec



    Posts: 692
    Joined: 1/26/2002
    From: Beaver Falls, PA, USA
    Status: online     		When I put mine together I used two incidence meters to make sure teh stab and wing were in proper relation and didn't need to add any thrust correction.

    The counterweights on the rudder and elevator however are getting ditched this winter.

    _____________________________

    Team Black Magic
    Pattern Junkie..Revver Brother #82..Gear Head

    (in reply to GDAVIS)
           Post #: 578

    RE: Excelleron 90 - 8/20/2005 1:32:20 PM   
    JasonS


     

    Posts: 166
    Joined: 4/15/2002
    From: Omaha, NE, USA
    Status: offline     		The openings in the fuse for the stab were quite a ways off from level, so when I reworked the openings I also set it up for about 1/4 degree of "up" incidence. As my plane is now it has just a hair of up elevator trim. I figure the added downthrust plus moving the cg rearward will balance out nicely.

    Thanks for the tips!

    _____________________________

    There is no such thing as too much time at the flying field!

    (in reply to petec)
           Post #: 579

    RE: Excelleron 90 - 8/22/2005 2:38:47 AM   
    JasonS


     

    Posts: 166
    Joined: 4/15/2002
    From: Omaha, NE, USA
    Status: offline
    quote:

    ORIGINAL: GDAVIS

    Jason,
    I put a washer under the motor mount on each side of the front bolts. This really transformed my plane. Also moved cg back to 7 3/8 or maybe a little more now that I put my rx battery just aft of the fuel tank. That and a few other things really made mine fly great!

    Greg


    Thanks! The downthrust change helped A LOT. I get almost no elevator trim change now throughout most of the cruising range. It has no pull now on downlines. I still have a fair amount of pull to canopy inverted and inverted 45 uplines.
    I'm thinking I need to move the C.G. back a bit more?

    _____________________________

    There is no such thing as too much time at the flying field!

    (in reply to GDAVIS)
           Post #: 580

    RE: Excelleron 90 - 8/22/2005 11:14:01 AM   
    kennyandannie



    Posts: 647
    Joined: 11/13/2002
    From: Universal City , TX, USA
    Status: offline     		I know that some will argue with me, but, I move my CG back until I need almost no elevator input for my inverted flight. This will almost always be behind the recommended range, however, you can't beat the way the plane flies precision aerobatics when set up this way.

    Ken

    _____________________________

    Ken Thompson - Team Black Magic - Team DragonFire
    Fellowship of Christian Modelers

    (in reply to JasonS)
           Post #: 581

    RE: Excelleron 90 - 8/22/2005 3:14:49 PM   
    GDAVIS



    Posts: 95
    Joined: 3/29/2003
    From: EDMOND, OK, USA
    Status: offline     		Ken,

    No argument here, that's basically what I've done with mine. Right now it's flying the best it has ever flown. The only other thing I have left to try is a 3 blade prop.. That will happen sometime this week when and if wx permits.

    Greg


    _____________________________

    Greg D
    Email: egwdavis@cox.net

    (in reply to kennyandannie)
           Post #: 582

    RE: Excelleron 90 - 8/22/2005 10:18:01 PM   
    wildnloose


     

    Posts: 884
    Joined: 11/26/2002
    From: Owasso, OK, USA
    Status: offline     		Hey guys,
    I was looking at using a tuned pipe/header combo for my ys110. I am looking at the Hatori 725/726 combo. Could someone please explain how you would connect these 2 together and the engine??

    Is there another piece that comes with the header?? The photo on Central Hobbies does not reveal much.

    Does the other end of the header insert into the tuned pipe?? or is there a coupler inbetween??

    Looks like a rigid setup, how would you use one of these with a Hyde mount??

    TIA
    wild

    _____________________________

    Lawn dart professional...
    Revver Bro #200

    (in reply to GDAVIS)
           Post #: 583

    RE: Excelleron 90 - 8/22/2005 11:06:32 PM   
    tommy s


     

    Posts: 1202
    Joined: 1/14/2004
    From: houston, TX, USA
    Status: online     		The muffler has a groove machined inside the inlet opening with a rubber o'ring
    in it and the header pipe is just pushed into the opening. The muffler is mounted
    to the airplane with two spring mounts that are included but they aren't worth the
    wire they're made of. Three sets of the wire mounts have broken from vibration so I am
    currently converting to a Dave Brown pipe mount, simple and quick. The Hatori muffler
    has a real nice sound, a lot quiter than the YS muffler.
    There is a flange and fitting that threads into the exhaust port in the 1.10, then the header
    is attached to the flange with the three screws you can see in the pictures.

    tommy s


    < Message edited by tommy s -- 8/22/2005 11:13:14 PM >

    (in reply to wildnloose)
           Post #: 584

    RE: Excelleron 90 - 8/23/2005 11:06:38 PM   
    wildnloose


     

    Posts: 884
    Joined: 11/26/2002
    From: Owasso, OK, USA
    Status: offline     		Thanks tommy s,

    Do you see any issues using a hyde mount with this combo??

    < Message edited by wildnloose -- 8/23/2005 11:07:47 PM >

    _____________________________

    Lawn dart professional...
    Revver Bro #200

    (in reply to tommy s)
           Post #: 585

    RE: Excelleron 90 - 8/23/2005 11:18:37 PM   
    tommy s


     

    Posts: 1202
    Joined: 1/14/2004
    From: houston, TX, USA
    Status: online     		No, will probably be better than the mount I'm using.

    tommy s

    (in reply to wildnloose)
           Post #: 586

    RE: Excelleron 90 - 9/4/2005 12:47:14 PM   
    privat pilot


     

    Posts: 13
    Joined: 6/11/2005
    From: australia, AUSTRALIA
    Status: offline     		I flew my excelleron today it was quite windy but it is the easiest to fly of all my planes. I have a saito 120 in the front and it had plenty of power.
    I didnt use the crimps in the kit as I found them useless because I tried one and it just slid along the wire so I used some copper tubing cut into short lenghs. I also used robart horns the ones with ball connectors and I overcome the elevator problem by just moveing the horns on the elevator forward so they overhang the bevel. The overhang was then filled with thickened epoxy. Its a great plane and Im looking forward to flying it again.

    (in reply to tommy s)
           Post #: 587

    RE: Excelleron 90 - 9/7/2005 5:58:19 AM   
    DaveR


     

    Posts: 100
    Joined: 10/17/2002
    From: Springfield, IL, USA
    Status: offline     		Ugghhh! I just can't get my Webra 120 to stay running. I destroyed a Midwest T-6 with this motor, now it's trying to kill the Excelleron. Not to mention, I can't seem to find a side mount muffler that's even a little quiet. I need another engine option that's side exhaust, with a reasonably quiet muffler and is not a YS anything. I'm just dipping my toes into the whole pattern biz, how much power is really needed to fly 401, maybe 402? When a person is just trying to learn to fly straight and level, I can't see the need to buy a YS and feed the monster at $$$/gallon. Does a person need anymore than a 90 2C in this bird to fly Sportsman? I figure if this is something I want to do, then upon leaving Sportsman I'd get a 2M ship, so why dump a lot into a motor for this bird?

    (in reply to privat pilot)
           Post #: 588

    RE: Excelleron 90 - 9/7/2005 12:10:49 PM   
    kennyandannie



    Posts: 647
    Joined: 11/13/2002
    From: Universal City , TX, USA
    Status: offline     		The OS 91 FX will fly the Excelleron through the Sportsman sequence just fine. My Super Tigre 2300 killed my first Excelleron so a borrowed YS 120 FZ is going in my second one, though I'm not sure it will be done before our district finals.
    The only place in the sequence that the 91 might not have very good authority is the 2 inside loops. It will pull through them just fine, as long as you don't make them too large, nice 100 ft. diameter loops and you'll be fine.

    I know a guy that flew his Quest with a 91FX last year, in the Advanced sequence, and the motor pulled that plane very well. The Excelleron has a little bigger fuse, but the weight is close to the original Quest.

    Good luck,

    Ken

    _____________________________

    Ken Thompson - Team Black Magic - Team DragonFire
    Fellowship of Christian Modelers

    (in reply to DaveR)
           Post #: 589

    RE: Excelleron 90 - 9/7/2005 3:31:10 PM   
    petec



    Posts: 692
    Joined: 1/26/2002
    From: Beaver Falls, PA, USA
    Status: online     		Strange to hear a Webra 1.20 won't run. I had one that out lived all the airframes I put it in. If you're worried about the 91 having enough power why not put a 1.08 in it? I'd offer you a YS 1.20 but Ken has my spare (it will be there to beat me at the finals won't it Ken?) and I just sold my 1.20 AC.....

    In all seriousness the 1.20FZ is overkill but it sure does pull the Excelleron around.

    _____________________________

    Team Black Magic
    Pattern Junkie..Revver Brother #82..Gear Head

    (in reply to kennyandannie)
           Post #: 590

    RE: Excelleron 90 - 9/7/2005 3:36:21 PM   
    kennyandannie