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Charlie Kellogg's TBM Avenger Build

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Old 09-29-2017, 05:41 PM
  #2626
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Hi Chic,
Thanks for the reference. How did you attach the G-10 horns to the carbon fiber rod? Adhesive only, or did you use some sort of mechanical fastener? Same question for the rod to the elevator attachment?
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Old 09-29-2017, 06:36 PM
  #2627
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Jerry, an civil engineer turned me on to T-88 Structural Epoxy Adhesive a few years ago. I usually purchase it on Ebay when I need more. You can google it.. This stuff is some kind of strong. It is not a short term (15 min, 30 min, etc) glue. Takes a few hours to set up. I sanded the carbon rod and G-10 and made slight cuts/grooves into the rod where the g-10 would be mounted. The cuts/grooves are there to provide increased bite for the applied T-88 to the rod and the G10. More T-88 was especially placed between the two pieces of G-10 mounted on the rod. When I glued the smaller size rod into the elevator halves, I used an epoxy brush to generously apply the T-88 in the circular wooded piece that the rod slid into, and into the same size circular hole cut into the elevator halves for the whole thing to slid into . Again, I scarred the carbon rods to assure a good bite with the carbon, g-10, and the epoxy. I wanted to hide most of the controls for a better competition appeal. Really strong. Hope this helps. Chic

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Old 09-30-2017, 07:00 AM
  #2628
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Hi Chic,
Thanks for all the information! I was planning on doing something similar, and have a used a similar approach on other airplanes. I have a couple more questions, and hopefully I will stop bugging you
  • What is the outside diameter of the carbon tube you used? And the inside diameter (or wall thickness)?
  • What is the diameter of the G-10 horn at the tube? What thickness G-10 di you use? For the horn what was the reason for having it curve forward? Was that to keep the ball joint on the hinge line?
  • Where did you buy the carbon rod? What type of tube is it (Roll Wrapped Carbon Fiber Tube, Braided Carbon Fiber Tube, Pultruded Carbon Fiber Tube)?
Once again, thanks in advance for your assistance!
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Old 09-30-2017, 11:01 AM
  #2629
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Please - I am extremely happy to for once be giving some acquired knowledge to this build as Noah, Larry, Peter, and others have done for me over the YEARS. So understand you are not bugging me. Let me try to answer your questions: Outside diameter of Protruded Carbon hollow rod is 3/8". I purchased the hollow rod off Ebay. Ebay has become my local hobby store. Ha, Ha. The circular wood that the rod slides into has an outside diameter of 3/4" and about a 9/32 inside diameter (open the inside diameter enough for the carbon rod to have a snug fit). I believe the G10 is 1/16" or so. I made the mistake of letting the wife clean the shop and all my scrapes that were on the floor (and I knew exactly where they were located) are gone. So I have to order more G-10. Anyway, the pushrod was an arrow shaft (5.4/630) is written on the shaft (whatever that means) with threaded rod glued into both ends. I have the elevator servo under the turret so I can remove the turret whenever I have to get to that servo. I'm going to use Larry's suggestion of Velcro to hold the turret in place. I installed the constructed elevator horn by gluing the horn into the two elevator halves with the pushrod shaft already connected at the elevator control horn. The shaft at the servo end was taped into position close to the servo. I installed the servo threaded rod to connect to 4/40 swivel connectors after the elevator end was cured. The elevator control horn has the forward curve to allow movement of the elevator upward without having the curved g-10 visible in the scale opening where the elevator connector is visible. I made the elevator control horn to look like the full scale connection. Anytime, I could possibly help, just holler. Chic
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Old 10-09-2017, 08:22 AM
  #2630
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Yea - I have started to fiberglass the fuse. Bottom Up. Chic
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Old 10-09-2017, 08:39 AM
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Chic.
Nice work. Just remember we only used Velcro for the bubble, we were going to screw mount the actual turret. We had to do this because for some UNKNOWN reason the bubble was further down in the fuse than the plans showed.
Filling hollows on the Trojan fuse and working on getting the canopies attached to the canopy slides, much easier on the Avenger

Larry
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Old 10-09-2017, 09:46 AM
  #2632
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Thanks Larry,
Help me Larry, still trying to picture this from the last time you said that. Where did you put the Velcro, on the sides of the turret at the bottom or where? Chic
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Old 10-09-2017, 01:12 PM
  #2633
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Chic,
We put the Velcro at the front bottom of the ball, you could also put a piece at the back of the ball. the piece we used was about 1-/2" long
Hope this helps
Just got finished installing new aileron servos in the avenger and had to order 3-1/2" pro links as for some reason the 5" are now wayyyyyyyyyyyy to long.
Best to Shirely


Larry
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Old 10-10-2017, 07:46 AM
  #2634
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Hey Guys,
Just glassed the other side of the bottom rear portion of the fuse. The torpedo is painted and hanging in the photo behind the fuse. Progress at work. Chic

Last edited by redtail; 10-12-2017 at 04:09 AM.
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Old 10-12-2017, 04:13 AM
  #2635
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Painted the torpedo like one that a full scale Avenger was carrying. Saw the same combo colors on a website on Avengers. Chic
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Old 10-13-2017, 06:40 PM
  #2636
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Pictures!
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Old 10-14-2017, 05:48 AM
  #2637
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OK Noah, just for you (and the guys following this thread). Smile. The bottom is fully glassed, just finished the dorsal fin and now final sanding the top sides of the fuse. Will do one side this morning and the other side either tonight or tomorrow morning. Chic
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Old 10-14-2017, 05:52 AM
  #2638
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Old 10-14-2017, 05:56 AM
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The small round holes above the rear vertical stinger gunner window are to launch the parachute flares for submarine searching. They are on my three views so they must be on the airframe. Chic
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Old 10-14-2017, 07:46 AM
  #2640
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Right side of fuse is glassed. YEA!!!!!!!!! Chic
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Old 10-14-2017, 07:48 AM
  #2641
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Need to invest heavily with Thayercraft Incorp in Highpoint, N.C. for the g/cloth and West Systems for the resin. Smile. Chic

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Old 10-15-2017, 09:58 AM
  #2642
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Amen - Thank you Father, the adventure of total fiberglassing is complete. Will let the right side dry for a day or so then on to a total fuse sanding and a second coat of West Systems. A light overall sanding and "PRIMER". Yea. Chic
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Old 10-15-2017, 03:19 PM
  #2643
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Brilliant!!!

The time you have invested will shine when those hundreds of small details become glaringly apparent after primer and paint!

Well done, my friend!

Noah
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Old 10-15-2017, 04:38 PM
  #2644
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Thanks Guys - Really appreciate "ALL" of you. Chic
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Old 10-20-2017, 07:30 AM
  #2645
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Great job brother... love the Torp.....

Larry
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Old 10-20-2017, 07:33 AM
  #2646
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Guys,
Trip to PIMA museum and the boneyard next weekend, let me know if you need any pix.
Jerry, what's the deal with get stencils, are you still making decals?????

Larry
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Old 10-20-2017, 09:27 AM
  #2647
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Hey Larry, you lucky dog - getting to visit the PIMA. Would like to see what the rivet seam around where the wing meets the fuse looks like. I don't believe it goes all the way around the wing. ??????? Also, is there a rivet seam where the elevator meets the fuse. ????? Thanks Larry. Last coat, extremely thin coat of West Systems place on fuse and wings. Will wet sand Saturday/Sunday and primer on Monday. At least that is the plan. Chic
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Old 10-20-2017, 12:50 PM
  #2648
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Chic,
If I can get them to let me through the ropes I will take all the pix I can.
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Old 10-21-2017, 04:40 AM
  #2649
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Ha, Ha - don't get yourself in trouble. We have enough rope line jumpers here at the White House, they are jumping ropes, fences, etc. I won't be able to bail you out, I still have to finish the Avenger. Smile. Thanks my friend. The airframe is sitting in the shop with a glistening on it waiting for the wet sand. I will final coat/sand the wings today. Still shooting for Monday to do part of the primering (fuse), wings at a later date. Chic
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Old 10-21-2017, 04:55 AM
  #2650
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No problem, I'll wear my Avenger hat and throw myself on the mercy of the first Docent I can find that looks like a decent guy or I can just sneak under the ropes and hope that the bail isn't too much
Nice work on the glassing, having issues with the canopy slides on the Trojan, last thing I need to accomplish before I start to glass the fuselage.... it's times like this I truly hat his hobby.
On the plus side I got the Avenger aileron servos in, next step to reset all the throws and install the gyro, I think that I will leave the gear valve not operating until after the 1st flight here not wanting to tempt fate or anything LOL
Trying to decide whether to keep the choke on a switch or change to just a rod.... decisions, decisions....
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