RE: Excelleron 90  
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    • All Forums >> RC Airplanes >> Pattern Flying >> RE: Excelleron 90
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    RE: Excelleron 90 - 12/10/2004 12:11:20 AM   
    Pattern Student



    Posts: 296
    Joined: 8/2/2003
    From: DEATSVILLE, AL, USA
    Status: offline     		Hi Guys,

    I just got the 90 size from my local guy. How about some help with engine options--I have an as new YS 91 FZ, NIB Webra 120 side exhaust (no pump), a NIB old OS 90 FSR, and a Thunder Tiger 1.20 rear exhaust w/pump. What do you think? Not sure the Thunder tiger rear exhaust w/pipe is practical for this plane.

    I intend using the plane for AMA pattern practice. Any comments?

    _____________________________

    Jim Oliver
    Revver Brother No. 51

    (in reply to swlarcham)
           Post #: 51

    RE: Excelleron 90 - 12/10/2004 1:53:18 AM   
    tommy s


     

    Posts: 1206
    Joined: 1/14/2004
    From: houston, TX, USA
    Status: offline     		Hey Jim,
    The rear exhaust would require some surgery to the fuselage , probably more
    trouble than it would be worth and since I'm not an OS fan that one would be
    eliminated if it was me. Eddie had a YS 91 in his originally and I understand it
    flew really well. The 1.20 Webra would probably be good also as there is plenty
    of room in the engine compartment and I like Webra engines and I also like plenty
    of power which the Webra has . You're going to enjoy this airplane.

    Good luck
    tommy s

    (in reply to Pattern Student)
           Post #: 52

    RE: Excelleron 90 - 12/11/2004 1:32:22 AM   
    Pattern Student



    Posts: 296
    Joined: 8/2/2003
    From: DEATSVILLE, AL, USA
    Status: offline     		Hey Guys,
    The instruction book calls for lots more control movement that I think I need for pattern flying--what are you using?

    _____________________________

    Jim Oliver
    Revver Brother No. 51

    (in reply to tommy s)
           Post #: 53

    RE: Excelleron 90 - 12/11/2004 1:51:59 AM   
    Bob Pastorello



    Posts: 5403
    Joined: 2/23/2002
    From: El Reno, OK, USA
    Status: offline     		Jim, with any luck I'll get a flight or two in tomorrow (finally) after a couple weeks' waiting. I've set the control throws to what I have found are good "pattern throws" for my preferences. Elevator at +/- 14 degrees, ailerons at 15 deg. Those sound pretty fast, but the Excelleron doesn't appear to be very "long" so they may be fine.

    Others have reported the manual to be far too sensitive...and I don't want it that way, either.

    So I'll report my opinions, soon as I have one!

    _____________________________

    Bob Pastorello www.rcaerobats.net
    Sponsored by RCGF Aero Products

    (in reply to Pattern Student)
           Post #: 54

    RE: Excelleron 90 - 12/11/2004 3:53:17 AM   
    Pattern Student



    Posts: 296
    Joined: 8/2/2003
    From: DEATSVILLE, AL, USA
    Status: offline     		Thanks for the info, Bob. Also, the PM.

    Will be waiting for a flight report, especially about how the 91 two stroke works out as far as power is concerned.

    _____________________________

    Jim Oliver
    Revver Brother No. 51

    (in reply to Bob Pastorello)
           Post #: 55

    RE: Excelleron 90 - 12/11/2004 6:43:41 AM   
    swlarcham



    Posts: 392
    Joined: 4/9/2002
    From: DeQuincy, LA, USA
    Status: offline     		Pattern flyer
    The instruction that came with my Explorer -the beta version of the Excelleron called for 10mm up & down on aileron and elevator and 20mm r & L on Rudder.

    Bob I got 2 flights in yesterday. Ist 2 since the accident. All went well but I was a little nervous.

    Hope you get to fly your tomorrow (oops today )

    Eddie

    < Message edited by swlarcham -- 12/11/2004 6:45:02 AM >

    (in reply to Pattern Student)
           Post #: 56

    RE: Excelleron 90 - 12/11/2004 8:11:44 PM   
    Bob Pastorello



    Posts: 5403
    Joined: 2/23/2002
    From: El Reno, OK, USA
    Status: offline     		Finally flew today. Four flights, feeling things out. First, the 90 two-stroke will HAVE to be on a pipe. Right now, on 10%, it's not "Advanced" class capability - needs mor UP-ness. So that will have to be sorted out. Second - flight performance is outstanding, although the control setups I have are NOT sensitive. Maybe a matter of taste, but the 15 degrees on elev and ailerons is almost just about right to me. VERY nice, stable airplane, straight and solid. Snaps just beautifully, and spins like it's a real plane. VERY, very nice.

    Third - CG - I have mine at 7" and that is WAY too nose heavy, as it takes a BUNCH of down elevator to hold level inverted, and lots more for inverted snaps. I'm thinking 7 1/4", maybe more aft will be needed. But even through the balance issue, this is an airplane that really does handle like a "big one". I am not disappointed at all, and when I sort out the CG and get some more punch, it will be Masters' capable, and that's no bull.

    This is a really good airplane, guys.

    _____________________________

    Bob Pastorello www.rcaerobats.net
    Sponsored by RCGF Aero Products

    (in reply to swlarcham)
           Post #: 57

    RE: Excelleron 90 - 12/11/2004 8:31:31 PM   
    tommy s


     

    Posts: 1206
    Joined: 1/14/2004
    From: houston, TX, USA
    Status: offline     		Hey Bob,
    I knew you would like it. I was wondering about the .90 because this is a really big
    .90 size ship. I think it can handle a 1.20 or maybe even a 1.40 very easily. The
    YS 1.10 I'm using pulls it very good but Dave Shadel says the new 1.10s have about
    the same power as the old 1.20s . Maybe one of your old ST-2300s would be just what
    the doctor ordered. I saw your Arresti at Temple and it is an outstanding airplane but this
    is a heck of a practice, backup, and just fun airplane to fly.

    Good flying
    tommy s

    (in reply to Bob Pastorello)
           Post #: 58

    RE: Excelleron 90 - 12/12/2004 4:24:35 AM   
    Pattern Student



    Posts: 296
    Joined: 8/2/2003
    From: DEATSVILLE, AL, USA
    Status: offline     		Hi Bob,

    Thanks for the report--especially concerning the 90 two stroke power, or lack of. Maybe either the Webra 1.20 or the T.T. 120 rear exhaust with low pitch props?

    _____________________________

    Jim Oliver
    Revver Brother No. 51

    (in reply to tommy s)
           Post #: 59

    RE: Excelleron 90 - 12/12/2004 9:26:13 AM   
    Bob Pastorello



    Posts: 5403
    Joined: 2/23/2002
    From: El Reno, OK, USA
    Status: offline     		Yeah, Jim. That would probably be good. I'm really considering an ST 2300, not so much for the beaucoup power, but the cost! Right now, $10 Gift Cert., and $15.00 off from Tower's $149.99. Makes it nearly impossible for me to justify some other choice!

    I'll keep ya'll posted!

    _____________________________

    Bob Pastorello www.rcaerobats.net
    Sponsored by RCGF Aero Products

    (in reply to Pattern Student)
           Post #: 60

    RE: Excelleron 90 - 12/12/2004 10:05:50 AM   
    Schpankme



    Posts: 267
    Joined: 6/6/2004
    From: Naperville, IL,
    Status: offline     		Bob,

    I like where you're going with the ST 2300 idea; using the standard muffler, it would swing an 18x8 or 17x10 @ 8,000 rpm on straight FAI fuel. The 18x8 would provide you with 8% more speed and double the thrust of your current 90 two-stroke setup for a 10oz (283.5g) weight penlty. If wing loading presented an issue, you could save 10oz of weight over the standard build using carbon fiber parts.

    __________
    Schpankme

    (in reply to Bob Pastorello)
           Post #: 61

    RE: Excelleron 90 - 12/12/2004 10:24:21 AM   
    Bob Pastorello



    Posts: 5403
    Joined: 2/23/2002
    From: El Reno, OK, USA
    Status: offline     		Yep. Already have the longer CF gear/pants from another project, and the ST only increases wing loading on this airplane by 1.3 oz/sq.ft. With the huge increase in power loading, I think it will be a "fun fly" kind of power available, and using flatter pitch props can keep the overall airspeed down, while enjoying pretty much unlimited vertical, I figure.

    Of course, the battery will have to be at the stab to get her balanced, but what the heck? It's a "fun plane".... that COULD be a serious pattern bird, though. It is surprisingly neutral and very well behaved.

    _____________________________

    Bob Pastorello www.rcaerobats.net
    Sponsored by RCGF Aero Products

    (in reply to Schpankme)
           Post #: 62

    RE: Excelleron 90 - 12/12/2004 10:27:50 PM   
    randy10926


     

    Posts: 43
    Joined: 10/31/2002
    From: Manassas, VA, USA
    Status: offline     		Well got one test flight. As usual something came lose during flight. This time the perry carb on the front of my OS91 lost both screws. For some reason is ran great until I throttle back for the first landing. Then it is was dead stick and too far from the runway. A little ding on the leading edge and another reminder to make a shorter first flight, land and check to see if everything is still tight.

    Anyway, got about 10 mintues; but as soon as the model broke ground you could tell it is a keeper. Flies straight for no coupling noticed yet. CG at 7.25 inches and it seems perfect to me. I must have come out more tail heavy than yours, as I have to put the battery at the firewall to get the CG this far forward. So I could easily put a heavier engine up front and shift the battery back. Put it seems to have nearly unlimited vertical on the APC13X8 and a half and half mix of cool power 15% and Magnum YS blend. I run a perry carb, until it tried to depart the engine. Just the fuel tubing and throttle clevis holding the carb in place when I got the plan back.

    Randy

    _____________________________

    Fly Safe and Straight

    (in reply to Bob Pastorello)
           Post #: 63

    RE: Excelleron 90 - 12/13/2004 8:59:16 PM   
    tommy s


     

    Posts: 1206
    Joined: 1/14/2004
    From: houston, TX, USA
    Status: offline     		Hey guys,
    Heads up , the Excelleron 90 is on sale at Hobby People for $199.95 !!!!!

    (in reply to randy10926)