djonesutah
Registered User
Looking for a continuation of help on possibe installation of an elevator spring. I got some advice earlier in the "modifications" section when I posted in somebody elses topic on "elevator spring" or "bungee".
Mostly Wag J-3, SC Rudder, SC Struts, VG's wing and tail, C-85 Stroker, Wing Tanks, Front Solo, W&B within limits, PA-12 stabilizer and elevator. No change when flying with 8.00 4's or 8.50 6's and associated weight increase.
The original question from me was if the Elevator Spring arrangement would solve my problem of not being able to trim for best glide, and, that my trim is closer to full nose up than neutral for cruise. I have plenty of elevator for 3-point. Adding a back seat passenger changes cruise trim position very little. The advice I received from this group was to measure stabilizer, and other angles, before adding any parts.
Using the longerarm immediately below the left window, between front and rear seats as level, best I could with covering in place.
- With stabilizer set at same level, 4 degrees nose down travel, 1.5 degrees nose up travel (out of spec). Nose down hits diagonal structure in tail as stop. Nose up,yoke travel bottoms with about 1/4 " before front stabilizer would hit longerarms.
-Wing angle of incidence seems to be about 1.3 degrees. My wings are ribbed stiched. If I wanted to measure 1.5 degrees I could by pushing on the right end of the level harder, but I think 1.3 degrees is realistic. Every rib, both wings, had the same angle plus or minus about 0.2 degrees, but average the same as the root. is that right? All washout is past the last full rib?.
-No dihedral in tail. I didn't measure wing dihedral.
-Elevator travel was as listed in TC.
I know my nose down stabilizer travel is out of spec. I'm not clear if flipping the yoke would change this, and I'm not clear if the last quarter inch would meet the TC spec ....probably. But it isn't my problem is it? Why is my cruise trim so far to the nose up position? Plane flys/stalls very nicely. Nice characteristics.
After reading other posts on the elvator spring, I'm under the impression that it would help solve or solve the problem. The spring/cable should be of the right tensionand length to overcome the weight of the elevator wanting to nose the plane down?
If the solution is to add the elevator spring, any suggestions onwhere to purchase entire assembly? I need the attachment to the yoke, and all the pulleys, etc. all the way through to the elevator horn.
Mostly Wag J-3, SC Rudder, SC Struts, VG's wing and tail, C-85 Stroker, Wing Tanks, Front Solo, W&B within limits, PA-12 stabilizer and elevator. No change when flying with 8.00 4's or 8.50 6's and associated weight increase.
The original question from me was if the Elevator Spring arrangement would solve my problem of not being able to trim for best glide, and, that my trim is closer to full nose up than neutral for cruise. I have plenty of elevator for 3-point. Adding a back seat passenger changes cruise trim position very little. The advice I received from this group was to measure stabilizer, and other angles, before adding any parts.
Using the longerarm immediately below the left window, between front and rear seats as level, best I could with covering in place.
- With stabilizer set at same level, 4 degrees nose down travel, 1.5 degrees nose up travel (out of spec). Nose down hits diagonal structure in tail as stop. Nose up,yoke travel bottoms with about 1/4 " before front stabilizer would hit longerarms.
-Wing angle of incidence seems to be about 1.3 degrees. My wings are ribbed stiched. If I wanted to measure 1.5 degrees I could by pushing on the right end of the level harder, but I think 1.3 degrees is realistic. Every rib, both wings, had the same angle plus or minus about 0.2 degrees, but average the same as the root. is that right? All washout is past the last full rib?.
-No dihedral in tail. I didn't measure wing dihedral.
-Elevator travel was as listed in TC.
I know my nose down stabilizer travel is out of spec. I'm not clear if flipping the yoke would change this, and I'm not clear if the last quarter inch would meet the TC spec ....probably. But it isn't my problem is it? Why is my cruise trim so far to the nose up position? Plane flys/stalls very nicely. Nice characteristics.
After reading other posts on the elvator spring, I'm under the impression that it would help solve or solve the problem. The spring/cable should be of the right tensionand length to overcome the weight of the elevator wanting to nose the plane down?
If the solution is to add the elevator spring, any suggestions onwhere to purchase entire assembly? I need the attachment to the yoke, and all the pulleys, etc. all the way through to the elevator horn.
