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  1. john Derstine

    110" TIMBER Assembly Thread

    Yes of course what is possible is nor always desirable, the sweet spot static margin is always around 7%-10%. cowl is now fit kinda, I have to trim the cowl to fit properly, and/or I'm probably going to have to shim the engine out a bit more. But the beautiful JR radio came today, the first...
  2. john Derstine

    110" TIMBER Assembly Thread

    thanks Nick, I read that in your set up, that's what's nice about a forum like this you can get real feedback from other pilots. I am always checking the parameters and theoretical flight envelope on planes out of habit from designing airframes in my past life. The up shot is every example is a...
  3. john Derstine

    110" TIMBER Assembly Thread

    CG consideration. Getting to the point where I can begin to check the CG location. The instructions are wrong, and most always err to nose heavy for safety reasons. Read about Nick's re calculation through trial and error to a reasonable CG. There is really a good way to check and verify if your...
  4. john Derstine

    110" TIMBER Assembly Thread

    never mind got it done already, had all day to play with the engine install, just using the supplied arm, pointing up so as not to interfere with the choke. waiting on Nordlocs, should be here tomorrow then I can put it in for the last time, maybe.
  5. john Derstine

    110" TIMBER Assembly Thread

    looking at the throttle arm supplied with the DLE, I'm a little iffy about how it is intended to be secured. Two set screws on to a round brass tube. are you guys at least filing a small flat on the brass shaft? it's hollow so not much room for error. I'm used to installing an extension on the...
  6. john Derstine

    110" TIMBER Assembly Thread

    Engine came in this afternoon, two hours later ... can you tell I was chomping at the bit? just first mounting to get the throttle cable locations etc. getting exciting now. used the four smaller spacers in the kit to get the correct length to nose. surprised it came with an NGK plug, at least...
  7. john Derstine

    110" TIMBER Assembly Thread

    forced to improvise again, since I can't get Ultracote covering or Blenderm tape, I found Transpore 3M tape which is Identical to Blenderm but has tiny perforations to allow skin to breathe, seemingly useless for gap sealing it is not, as when you put it on both sides it renders itself...
  8. john Derstine

    110" TIMBER Assembly Thread

    servo alignment pics,
  9. john Derstine

    110" TIMBER Assembly Thread

    fun with wires today, got the wing harnesses fabricated, actually installed two wing servos without radio to see the geometry. using top hole in horn and a 1 3/4" spacing on a 2" arm seems to give 98% max throw or so. not sure how the geometry will work, I think that is ok, correct me if I'm not...
  10. john Derstine

    110" TIMBER Assembly Thread

    servos arrived, I cheaped out and went with a Chinese brand. A lot of guys in Australia seem to be using them even on 30/40% aerobatic ships, hope they are ok. I won't be flogging this plane and it won't be getting a lot of air time so I think they suit my needs well. 50 bucks each Titanium and...
  11. john Derstine

    110" TIMBER Assembly Thread

    speaking of tailwheels, I have not acted yet, (waiting to see if I need tail weight or the CG point) But Ohio Superstars makes an unbreakable unbendable 1/3 scale unit including a 2 7/8" wheel, spring steel leaf springs, 6061 T6 casters, ball bearing, weighs 5 3/4 oz, has anyone weighed the...
  12. john Derstine

    110" TIMBER Assembly Thread

    OK, great then, thanks, I have already purchased servos maybe next time, I understand the principle of X bus, S bus, EX bus et al, but I don't know how to advantage it's use. In a plane with only 7 servos I don't understand the need, perhaps other than aligning a dual elevator set up. Fighting...
  13. john Derstine

    110" TIMBER Assembly Thread

    forgot pic
  14. john Derstine

    110" TIMBER Assembly Thread

    This has become an expensive project, only because I'm restarting my RC career after 20 years, have to buy everything, tools, supplies and not the least a radio. decided on a JR system from a dealer in Singapore as they come recommended and are kinda close. Now I have shopped all over for JR...
  15. john Derstine

    110" TIMBER Assembly Thread

    One thing I did last week was to cut the covering on the wing and reinforced the strut attachment with balsa stock and Hysol mixed with chopped fiberglass for strength. I used some more beer can aluminum to cover the holes, I really don't drink much beer, it was the same can I used for the...
  16. john Derstine

    110" TIMBER Assembly Thread

    Not doing much the last week, still waiting on servos, a long sad story but some will be here next week. Good news is my Booma R/C order arrived so I thought I'd share some of the nice stuff they sent, minus the most important thing I ordered from them, the ultra switch dual battery backup...
  17. john Derstine

    110" TIMBER Assembly Thread

    3 pics are worth 1,000 words :) coil the aluminum strip around the bolt, remove, hold it in your fingers, tighten it so it becomes compressed insert in the 10mm hole in gear (plus in my case the strap), let it uncoil, insert bolt and tighten, helps to leave it slightly proud so it is forced to...
  18. john Derstine

    110" TIMBER Assembly Thread

  19. john Derstine

    110" TIMBER Assembly Thread

    What I ended up doing to mount the airtop wheels: first I found the missing hub bolt laying on the floor apparently slipped out of the little zip lock bag and was floating around in the main bag, then fell on the floor. I decided to use stainless steel axels instead of grade 8.8 as the 8.8s were...
  20. john Derstine

    110" TIMBER Assembly Thread

    Wheels today, at the risk of being redundant, I'll add a little update to the Airtop situation. As of today I think Airtops will be the only alternative bush wheel solution, PMT's are not available for 3-4 months as of this date. PR's are non existent. Anyway my Airtop 180mm wheels arrived...
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