MY Hero !!!!!!!!!!! The coupe flys at dawn !!!!! I just didnt understand the operation of the tab . Now it makes sense.Thanks Harry, and all the rest of you for being such a constant source of help and support. And thank you for this forum , ED. --- On Sun, 7/26/09, Harry L. Francis <[email protected]> wrote:
From: Harry L. Francis <[email protected]> Subject: Re: [ercoupe-tech] Second Flight To: "Nick King" <[email protected]> Date: Sunday, July 26, 2009, 12:51 AM HI Nick, Imagine the air flowing over the elevator and trim tab.......If the tab is down, the air flow pushes the elevator up. Elevator up, nose up.. If the tab is neutral, the air flow has no effect. Now, the trim lever and wire attachment may be installed incorrect, or possibly made incorrect, so that the trim tab works backward on your coupe. If the lever is pivoted in the middle of the lever, and wire attached to the bottom of the lever, then the trim works properly...move lever back ( nose up), the wire moves forward and moves tab down. If the lever is pivoted on the bottom and the wire aattached to above the pivot point, then the wire moves forward with the forward movement of the lever....causing the tab to move down. Originally the trim (on early Coupes), there was no trim tab. The elevator control was activated by cables and a spring. The wpring was attached to a cable that was activated by a crank on the panel. turn the crank CW, and this increase pressure on the spring, lifting the elevator., resulting in nose -up ( just like pulling on the control column.) This was changed to a trim tab, which is effective, even if the older system failed due to a broken spring, etc, loosing all elevator control. Hope this helps, HArry --- On Sat, 7/25/09, Nick King <[email protected]> wrote: From: Nick King <[email protected]> Subject: Re: [ercoupe-tech] Second Flight To: "Harry L. Francis" <[email protected]> Cc: [email protected] Date: Saturday, July 25, 2009, 8:12 PM OK , I might have read something in your reply that hits the nail on the head. Did I understand you to say that........ when the trim tab on the elevator is moved DOWN , it makes the nose go up ? If that were right that would solve it. I have never moved it down (which would be pushing the lever forward in the cockpit ).It was siezed when I purchased it and after fixing the cable I was experiencing the nose down problem .I have never flown with the tab lower than the stop.I thought that the airplane would nose over more as you moved the trim tab lower. --- On Sat, 7/25/09, Harry L. Francis <harrylfrancis@ yahoo.com> wrote: From: Harry L. Francis <harrylfrancis@ yahoo.com> Subject: Re: [ercoupe-tech] Second Flight To: "Nick King" <nick.king88@ yahoo.com> Date: Saturday, July 25, 2009, 6:08 PM Nick, Carefully re-read Lyn's msg... The trim tab must move downward to lift the elevator upward.. S be careful to observe that when the trim lever is in the full up position, the trim tab is in the full 45-60 degree downward position. Fly Safe - have Fun HArry --- On Fri, 7/24/09, Nick King <nick.king88@ yahoo.com> wrote: From: Nick King <nick.king88@ yahoo.com> Subject: Re: [ercoupe-tech] Second Flight To: iflysmo...@aol. com Cc: ercoupe-tech@ yahoogroups. com Date: Friday, July 24, 2009, 8:24 PM My cable is alright and I just lubed it. I did notice that the stop for the trim tab does'nt seem te allow for any up trim . With the trim in the full up position the tab is level with the elevator. Should'nt there be some travel up. If so ,how much and how do I adjust it . Could the stop be the wrong one. --- On Fri, 7/24/09, iflysmo...@aol. com <iflysmo...@aol. com> wrote: From: iflysmo...@aol. com <iflysmo...@aol. com> Subject: Re: [ercoupe-tech] Second Flight To: nick.king88@ yahoo.com, ercoupe-tech@ yahoogroups. com Date: Friday, July 24, 2009, 10:23 PM Hey Nick: The first thing to do is to make sure that the trim tab is moving through its full amount of travel. Push the trim control handle to the full forward position and check that the tab is level with the elevator. Then pull the trim control handle to the full aft position and check that the tab is now down about 60 degrees down (more than 45). If the tab movements comply approximately with those numbers, double check your weight and balance to make certain that the empty CG is within the 25.2 to 25.8 inches prescribed in the TCDS. If those are both in sink, look at the trailing edge of the elevator. If it is bent down, this adds additional down trim and may need to be changed. You will need to fly the airplane again. With the trim control full aft, you should be able to glide at approximately 70 MPH ( a little less is just fine) I am assuming you will find that most likely the trim tab is not operating through its full range. This is generally caused by corrosion in the trim wire housing inside the horizontal stabilizer. I have found this on most of the Ercoupes I have worked on. Some I was able to loosen it up by spraying a good dose of liquid wrench, followed by lots of WD-40 or other similar penetrating lubricant, on as much of the wire housing I could access by removing the tail cone. Others required removal of the housing and replacement (I would usually replace the trim wire and housing if I had to go to these efforts). You may also be able to lubricate the wire by loosening its attachment at both ends and pulling it out about 3 feet. Then applying light grease to the wire before pushing it back into place and re fastening it. Lynn Nelsen in a message dated 7/24/2009 3:43:49 P.M. Eastern Daylight Time, nick.king88@ yahoo.com writes: Wow ! What a glorious morning and wonderful flight.72 degrees light overcast , clear as a bell.This was the first time I got to fly the coupe since I flew her home on a wing and a prayer . Been working on her for 4 months.ASI is about 30 mph high but that will get changed. My Garmin 196 was right on. The little coupe flew majestically. I tell people she is the Metropolitan of the skys.Us old guys remember that little car. I love flying with an open cockpit. I do have one major concern .!! With the trim all the way in ( tab up against stop ) cruise speed , level flight , I can let go of the yoke and she DIVES like a STUKKA. What tha......... .That aint right!!!!!!! ! What can it be ???? How do I fix it? A Good Credit Score is 700 or Above. See yours in just 2 easy steps!
