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Seagull 260 rolls to the right.... Help

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Seagull 260 rolls to the right.... Help

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Old 09-02-2009, 11:27 AM
  #26  
k3 valley flyer
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Default RE: Seagull 260 rolls to the right.... Help

OMG!
Old 09-02-2009, 09:01 PM
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Default RE: Seagull 260 rolls to the right.... Help

Hi!
Any plane that snaps in either a sharp turn or in a loop...is to heavy!
Or more precisely has too high wing loading!!
That may be true but the planes we are talking about have elevator surfaces almost twice the size of the horizontal stabilizer and it is very easy to stall the tail and have the engine torque snap the plane to the right.

I just got back from flying my 180 seagull extra 260 I cut the throw back on the elevator and still got it to do it a bit but its almost gone so a little less throw and problem will be solved.

To charlie1960 Dead on analysis for me thank you for the support!!!![8D]
Old 09-02-2009, 09:50 PM
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Default RE: Seagull 260 rolls to the right.... Help

The comment about plane being to heavy came from JAKA, not me. Weight has nothing to do with it. Like Charlie 1960 I also suggested it was due to to much throw in the elevator. One of the first things we do at our field with a new plane is take it up high and give it full up elevator while climbing to see if it will snap. If it does we land and take some throw out of the low rates. Alot of the guys leave it in on the high rates because they want it to snap on high rates if full up given. They like to see em corkscrew. Glad you solved the problem.
Old 09-03-2009, 05:41 PM
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Default RE: Seagull 260 rolls to the right.... Help

oops sorry k3 valley flyer ment to do a general reply wasnt aimed at you. I did see you also called this one and appreciate it finally at the end of page 1 the problem of snapping right was resolved thanks to you also.

I see your from Central IL I am northeast MO across the river from Quincy IL I make it to champain every year for E-fest the champain kids take there modeling extra serious.
Old 08-21-2024, 01:28 PM
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It is tail heavy and too much elevator throw. .


Originally Posted by skyhawk940
i have a seagull extra 260, 90 size. Saito 120, 16/6 prop, 8700 rpm, 9.5 lbs. The plane fly’s great, but when ever i feed in a lot of elevator the plane rolls to the right. When i do a tight loop the plane corkscrews to the right. I’ve posted here before and was advised to cut back on the elevator throws. I started with one inch up and down and now i’m at 3/4 inch each way. The manual says you can go up to 1.25 inches of throw. It’s a little better, but still does the corkscrew thing. I’ve sealed all of the hinge lines. The plane is balanced wing tip to wing tip and i’ve moved the fore/aft balance back and forth. The wings are not warped. I’ve measured everything with an incident meter. I’m at my wits end. I’m sure there are other people flying this plane. Is anyone else having this problem? And yes the elevator haves are moving together and the control rods are not flexing. The aleirons are not moving when i pull up. I’m in a very small club and fly by myself most of the time. I’m about ready to buy another plane!!!

Last edited by sailr; 08-21-2024 at 01:35 PM.
Old 08-21-2024, 01:31 PM
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Originally Posted by live wire
this may sound stupid but do you fly with your thumb or two fingers. I found my self feeding in aileron to all my control movement with my thumb. After i found out what i was doing it stops breaking to the right.

exactly. Thumb flying, imo is dumb flying. I use the pinch method which gives you much more precise control.
Old 08-21-2024, 01:33 PM
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Originally Posted by falldowngoboom
skyhawk,

you might check to see how much right thrust is built into your engine. A couple of weekends ago i was flying my arrow and while it flew horizontally with no problems and would roll normally, when i pulled it into the vertical it pulled to the right, and loops came out as corkscrews. Turned out that after some routine engine maintenance the week before, i'd remounted the engine and it ended up cocked off to the right. There should probably be 1 to 2* of right thrust in your motor/firewall, but more than that could cause the flight characteristics you've described.

Fred
most manufacturers build the thrust angle into the firewall. That's been my experience.
Old 08-31-2024, 12:20 PM
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As I said years ago! To heavy! Or To much elevator trow! Or a combination of the two!
Old 09-03-2024, 04:06 AM
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Unequal throw on both elevator halves ( assuming they each have one servo ) and/or lateral balance is off.
Old 09-03-2024, 06:26 AM
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Yeah! Lateral balance is very important but from my experience helping new-bees for 40 or more years ...A too heavy airplane and too much elevator throw is also a factor

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