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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Wed Nov 18, 2020 10:00 pm 
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Joined: Thu Aug 25, 2011 9:14 pm
Posts: 2048
Location: Bryan, TX
I finally got around to gluing the two horizontal stab halves together tonight and I'll let the glue cure until tomorrow.

I wanted some nice heavyish weights to put on them and I immediately thought of my old GForce packs. However they have turned into a questionable fire hazard despite the fact I discharged them. I'll have to look into why the cells puff up so much when they are completely dead.

I mixed up some 30 minute epoxy and got the halves onto the bottom cores. I found that I needed to adjust the placement of the much older and slightly heavier old drill packs I was using a little bit to make sure the roots lined up perfectly.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Thu Nov 19, 2020 10:04 pm 
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Location: Bryan, TX
Before I continue with the Cadence, it's time to put some new elevator servos in the DeJaVu. I need to measure the throws and then I'll take the horitonal stabs off.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sun Nov 22, 2020 9:30 pm 
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Location: Bryan, TX
I got started on the new elevator servos today. I measured the throws just to make sure I know what to set them back to when I'm done and the rudder servos are showing signs of worn out pots too. Not really a big surprise but I'm not thinking I might do that before I put the horizontal stabs/elevators back on.

While I have the stabs off I'm going to add on to the anti-rotation pin going through the fuse to give me more security with the incidence adjusters.

I'm also going to build new servo extensions for the plane. I went through the equipment I have and I'm out of the JR style male connectors so I'll probably just make the extensions 1/2" longer and go with the Futaba J style and call it good.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Mon Nov 30, 2020 10:33 pm 
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Joined: Thu Aug 25, 2011 9:14 pm
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Location: Bryan, TX
New elevator servos are installed and I just reused the old 1m extensions. I thought about it and since they were the lighter gauge, it would probably be best to stick with them for the CG. Replacements seem to be out of stock or requiring a long time in shipping so I'll order some new ones when I order the replacement rudder servos and get everything setup at the same time.

I doubt I'll get to resetting the incidence tomorrow evening but I'm hoping to do it Wednesday and hopefully get some flights at the club meeting on Saturday.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Wed Dec 02, 2020 1:04 pm 
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Location: Bryan, TX
I had some other things to do last night but I did pick up some Loctite CA to try out. The tech sheet by Loctite said this was thin and I found it's not quite as thin as traditional hobby grade thin CA, but thin enough to take on some of the purposes such as wicking into screw holes, minor repairs, and things like that. It's expensive per ounce but it you just need a little thin CA and no hobby grade is available, this will work.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Thu Dec 03, 2020 10:36 pm 
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Location: Bryan, TX
I started checking and resetting the incidences on the DeJaVu tonight. The wings went relatively easy but I'm going to have to sand some of the JB Weld on the horizontal stab anti-rotation pins down. The best I could do was +0.2 and I need a flat 0.

I also broke out my SOKO gauge because I was worried the weight of the Aero Perfect meter was a bit much for the tail. I think if I can get the SOKO to read 0, I'll just call it good.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Fri Dec 04, 2020 11:13 pm 
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Location: Bryan, TX
Tonight I took a small grinding bit and ground down the inside of the stab adjuster just a little. I was able to get the left horizontal stab done but the right ran out of thread. So I stopped and glued on another piece of carbon for the screw to go against. I'll see how it looks in the morning but I doubt I'll be able to fly it tomorrow. Maybe the weather will hold for Sunday afternoon.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sat Dec 05, 2020 11:05 pm 
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Location: Bryan, TX
Well I basically wasted time last night gluing on another piece of carbon. I have inspected the stab adjusters and they seemed OK but tonight I discovered the one in question was stripped out. It's a common problem apparently on CA Models airframes so I'll have to get some from Gator RC. Since I'll be making an order, I'm also going to look in to a new stab tube since the one in the plane currently has always been a little loose.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sun Dec 06, 2020 9:53 pm 
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I took some measurements on the DeJaVu this morning and my stab tube was a little over 10mm but my phenolics measure 11mm. So in addition to the stab adjusters, I order a new stab tube. The package deal was a little cheaper than buying those components separately too.

Since I'm going to have to wait for parts, I decided to tackle the the wing tube phenolic on the Cadence this evening. I began by opening the holes in the sides of the fuse just a little for the phenolic to fit in. I then centered the wing tube side-to-side.

In order to make sure the ends of the tube were equidistant, I used some fishing line that I've actually use in the past that has no stretch in it and is sold under the name Fireline. I placed a small screw in the back of the fuse and used a perfection look to be able to measure the distance from the same point.


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 Post subject: Re: The Notorious B.E.N. Flying/Building/Repairing Blog
PostPosted: Sun Dec 06, 2020 9:58 pm 
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Location: Bryan, TX
Once I verfied the wing tube was equidistant from a common point, I needed to make sure it was level with the lateral cross section of the fuse. For this I used my Aero Perfect meter.

I used a miter box to span across the fuse to get the zero point. I had trouble measuring the angle with the meter jumping all over the place so I put some clay pots under the wing tube. I rechecked the alignment of the tube from the common point and measured the angle. I was within 0.05 degrees and the meter kept clicking that the set angle matched so I hit the phenolic with a few drops of Zap-A-Gap.

I'll trim down the phenolic and put a light fillet of epoxy with milled fiberglass hopefully tomorrow.


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