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Greetings and an Introduction http://t18.net/thorpforum/viewtopic.php?f=8&t=7934 |
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Author: | James Grahn [ Mon Apr 25, 2016 12:29 am ] |
Post subject: | Re: Greetings and an Introduction |
Welcome Ian! Congrats on your purchase. I would suggest aligning the gear. They need to be straight or slightly out with weight in the seats. It really helps tons.. Enjoy. Cubes |
Author: | bfinney [ Mon Apr 25, 2016 1:07 am ] |
Post subject: | Re: Greetings and an Introduction |
My aircraft was a bit squirrly on landing in the 60-40 mph range. I adjusted the toe-in to nuetral and it tamed the handling problem. I would check the toe-in of the main gear and adjust as needed. |
Author: | Hagle347 [ Mon Apr 25, 2016 6:34 am ] |
Post subject: | Re: Greetings and an Introduction |
Hi Ian I can't tell from the photos, but if TB has the original tail spring- consider replacing it with the trusty tail rod and aviation products tail wheel. By doing so you'll lower the tail an inch and be able to get closer to a full stall landing. That will unload the wing and get a shorter transition time between lift and no lift. Enjoy making TB yours. Terry |
Author: | dickwolff [ Mon Apr 25, 2016 7:22 am ] |
Post subject: | Re: Greetings and an Introduction |
Hi Ian, Congratulations. Been there, done that, bought the t-shirts, tools, radios, parts, materials, books, GPS, repairs, hardware....the list goes on. You're lucky to have the option to fix and fly at the same time. It is unfortunate that there are so many examples of neglect in the fleet. Old airplanes tend to stay that way. THe good ones are owned by the folks who are active on this forum. We can only hope that pride of ownership trickles down. Feel free to contact me offline. I've made every mistake in the book. I might be able to save you time and money. DW (edwolff)(at)(bmts)(dot)(com) |
Author: | Fraser MacPhee [ Mon Apr 25, 2016 9:57 am ] |
Post subject: | Re: Greetings and an Introduction |
Awesome Ian - as has been said, check the wheel alignment. A carpenters bubble level with a laser is helpful with this. Just put it up against the wheel and mark where the laser points on the back wall of the hangar and measure the distance between the marks. Obviously, make sure the plane is square to the back wall. If the distance between the laser dots is greater than the distance between the wheels, you have toe-in. If you can extend the aircraft centerline to the wall, you can also see if one wheel is more cockeyed than another. The other thing to check is the tailwheel. Take the tail off, inspect and make sure that the connections are solid and the assembly is as per plan or better. I made a few landings in a T-18 with a tailwheel held on only by the bottom skin. They were unnecessarily fun landings. There have been other instances of these conditions on T-18s. Somewhere on this forum are pictures of the repair I made. Keep practicing. I found that concentrating on precise airspeed control on final improved my landings markedly. Having said that, make sure you know the "indicated" stall speed from a safe altitude. There are inaccurate ASIs out there causing pilots to motor down final at 15 knots too fast and crow hop down the runway to the delight of onlookers. Having having said said that that, don't get too slow either.....precise airspeed control, good alignment of the mains and a solid tailwheel will get you the polite applause and the oohs and ahs of the cheap seats more often than not. Cheers |
Author: | Lou [ Mon Apr 25, 2016 2:25 pm ] |
Post subject: | Re: Greetings and an Introduction |
Welcome to the club. another machine getting the attention it deserves. |
Author: | Ian Ahner [ Mon Apr 25, 2016 8:46 pm ] |
Post subject: | Re: Greetings and an Introduction |
Wow. Four hours in her today. Most of that was landings. Some things I've noticed: 1) I was coming in a bit fast. I had been flying the approaches at 90 and bringing her back to 85 over the fence. This was part of the tendency to go flying again, I think. Slowing back to 80 over the fence and bleeding it off before touchdown helps a ton. On the flip side though, if you get too slow, she falls out hard. Ask me how I figured that out. 2) She really REALLY hates crosswinds. I decided to go over to the other runway and practice some crosswind stuff. I ran out of controls very quickly and got pushed across the runway pretty far. I resorted to landing on the upwind side of the runway just expecting to get pushed over to the centerline before I get slowed down. 3) The only thing this bird hates more than crosswinds are stalls. She was NOT having it. I pulled back the power slowly and just maintained altitude as she slowed down. At about 60mph things got a little wishy-washy. At 55 she threw a temper tantrum. It felt almost more like a wash-out than a stall. She shook and shuddered and tried really hard to drop a wing. No preference on which wing, but holding her in that required various rudder-to-the-stops inputs to keep the wings level. In this we were able to get some falling-leaf type results, but she shuddered the whole time and definitely didn't like it. I will check the gear alignment, that may be a good lead. I will also take some pictures of the tailwheel and post them. For those of you here, what speeds do you like to approach at? I have been preferring 3-pointers. Does anyone here prefer to wheel land these? What does that look like? Loving the bird, but there is a learning curve for sure. Cheers guys! -Ian |
Author: | dan [ Mon Apr 25, 2016 11:04 pm ] |
Post subject: | Re: Greetings and an Introduction |
75-80 over the numbers, 1 notch flaps, I hold it off till it stalls on 3points, yank the stick back the tail sticks, yank the stick back too soon when you are a little faster and it gets airborn again. Congrats on your purchase!! Dan |
Author: | Fraser MacPhee [ Tue Apr 26, 2016 9:24 am ] |
Post subject: | Re: Greetings and an Introduction |
1) I was coming in a bit fast. I had been flying the approaches at 90 and bringing her back to 85 over the fence. This was part of the tendency to go flying again, I think. Slowing back to 80 over the fence and bleeding it off before touchdown helps a ton. On the flip side though, if you get too slow, she falls out hard. Ask me how I figured that out. Even Cessna 150 fall hard at some point. The old Land-O-Matic softened the blow, a luxury not found on a T-18. Sounds like your are getting more comfy with the speeds though. 2) She really REALLY hates crosswinds. I decided to go over to the other runway and practice some crosswind stuff. I ran out of controls very quickly and got pushed across the runway pretty far. I resorted to landing on the upwind side of the runway just expecting to get pushed over to the centerline before I get slowed down. X-winds can be tricky....lots of wing down. The cranked wing helps with this I think. I have landed in about a 20 knot direct X-wind (low on gas) Not fun, but doable. I took the opposite of you and landed on the downwind side of the runway pointed more into the wind. Obviously, the wider the runway, the better. 3) The only thing this bird hates more than crosswinds are stalls. She was NOT having it. I pulled back the power slowly and just maintained altitude as she slowed down. At about 60mph things got a little wishy-washy. At 55 she threw a temper tantrum. It felt almost more like a wash-out than a stall. She shook and shuddered and tried really hard to drop a wing. No preference on which wing, but holding her in that required various rudder-to-the-stops inputs to keep the wings level. In this we were able to get some falling-leaf type results, but she shuddered the whole time and definitely didn't like it. LOL....sounds more like your bird was doing exactly as you made her do......It's nice to hear of people keeping up with good rudder skills....keep up the good flying. |
Author: | James Grahn [ Tue Apr 26, 2016 9:46 am ] |
Post subject: | Re: Greetings and an Introduction |
I wheel land mine, especially in crosswinds. Much more controllable. The tail better be down by 40 tho, or you will lose rudder effectiveness. I come over the fence at 70knots. Cubes |
Author: | Jim Mantyla [ Wed Apr 27, 2016 7:39 am ] |
Post subject: | Re: Greetings and an Introduction |
I stabilize my approach at about 82 mph and chop the power when over the numbers. I tend to 3 point it regardless of the winds. I have found my plane to handle cross winds just fine. Somethimes I touch and roll a bit on one wheel but it is perfectly controlable. The toe-in in critical that it is set at zero degrees.( I use the string and square method to check mine) I also added VG's just ahead of the rudder and now it thinks it is 6" taller and as a result there is no more dancing on the pedals when the tail is down on roll out. I also have the Trusty tail spring with the Aviation products tail fork assembly with a solid 6" Matco wheel. The Matco wheel is much lighter than the cast iron wheel with the Aviation Products assembly. Regards, Jim |
Author: | lance38dt [ Wed Apr 27, 2016 9:45 am ] |
Post subject: | Re: Greetings and an Introduction |
Jim, how about a pic of the VGs on the vert stab? I'm interested |
Author: | Jim Mantyla [ Wed Apr 27, 2016 10:48 am ] |
Post subject: | Re: Greetings and an Introduction |
Darn, It might look right for the guys in Austalia or you can flip your screen to see the right orientation. Jim |
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