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Kyle Communications

My Savannah S model rebuild Blog

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On 06/11/2019 at 5:46 AM, Kyle Communications said:

The aircraft is 2011 build and its all 6061-T6

The corrosion is on the ribs too around the rivets where they went through the skin into all the internal supports.

 

Thanks.

 

I presume a little galvinic corrosion from the steel ball still in the rivets.

 

I wonder if a sacrificial anode bolted to the plane somewhere is worthwhile?

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4 hours ago, bexrbetter said:

Thanks.

 

I presume a little galvinic corrosion from the steel ball still in the rivets.

 

I wonder if a sacrificial anode bolted to the plane somewhere is worthwhile?

I believe this only works on boats. An electrolyte?  Solution is required to complete the circuit. 

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Yes thats right Thruster...no the issue was no deburring was done on the holes or edges and no black stuff applied on the fin...and it was not applied properly on the stab so water gets in easily and its just straight our corrosion

 

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If the Sav is anything like the 701, water is going to get in anyway.  There's gaps all over the place - at the tips, back of the fuse, rudder/fin etc.  

 

I don't know what I'll be doing with mine when it's finished, but it's not going to sit outside uncovered, that's for sure.

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Mine is always hangared..they leave the openings as drains anyway..well thats what Reg Brost told me. I have been caught having to fly through some showers...and yes it leaks like a siev hahahah.

 

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The tailplane was a mess internally also the skins were a bit how's your father as well as you can see by the previous pictures. So pulled it all apart to its individual parts and spent hours stripping and cleaning them up then acid and alodining the lot. This had small skin tensioners fitted to the outer panels but they were still quite weak so I made better ones and have got them ready to be installed when the skins go on. The top and bottom skins were well damaged/bent around in the centre due to the tailplane must have flexed a bit during the accident also the internal and rear spar. The strengtheners strips on the top and bottom of both spars were also deformed a bit so I made new ones from the 0.032 sheet and redrilled them all also straightened the actual spar edges and refitted these to the spars.

I decided to keep the tip attachments on the tailplanes using the factory strips they supply in the kit as these are probably the only things I have found on this whole rebuild that are actually done well. When I rivet the skins on I will have to change the centre rivets over the spars on the skins and redrill them for 5/32 as the holes in the skins have been butchered quite a bit I wouldnt like to fit the 1/8 rivets into it as they wont have the gripping power to the skin

I have though made up the strips for the top tip of the rudder cap my usual way I just have to mark the holes from the tip and put in the nutserts. These strips have been alodined and I have sanded the base of the tip so it is actually square now

There has been a lot of discussion about rivets of the centre hinge support working loose and some have put a bolt in to make sure so I have had a good look and decided to add a few more stainless bolts and nylocks to there. You can see them in the pictures also left and right altenating rivets holding the bearing plates together.

I have had to do a bit of panel beating on the nose skin as well which I did last night and I will alodine that skin this afternoon so then I can get the tailplane back together tonight so then I can get onto the elevator. I have partially paint stripped the elevator but I do have to replace the centre bearing angle strip holder as it is shockingly drilled out so I will replace it with a new one and redrill the bearing hole correctly.

The cabin frame is now back from the powder coater so later this week I can reinstall it back in and get te boot cowl on and then can get the controls in the front in. The undercarriage will then go on and I can put the tailfeathers back on and the engine can go on for balance then I can get the fuselage outside the shed into the carport

 

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Edited by Kyle Communications
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Got the elevator pulled apart late last week and worked on cleaning all the parts up this weekend. I have to make a couple of support brackets to repair the damaged bits but not a lot of drama. Spent quite a long time cleaning and tapping out the dents and bends in them. All the parts are ready to be alodined now. The tailplane has bee finished ready for the brackets to put on the elevator. The original centre pivot bush for the elevator was stuffed as you can see and I have replaced that angle alu piece and will redrill it correctly

 

Thought I had finished the rudder but when I had a good look at it the bugger had a slight twist so I deriveted one side and used the steel tubes I got the wings and made a jig up to align it correctly and re-riveted the rudder...now its nice and straight. Always consider than anything that is NOT parallel you can do on a benchtop you will ned to jig and hold to make sure it is prefectly symetrical and straight

 

Thought I would throw in a picture of my 2 faithful woofers..keeping guard while I work on Mabel......well maybe they were there because of the big fan I have keeping me cool in the hot shed 🙂

 

 

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When I get it finished 🙂

 

I am trying to get it done as fast as I can but still do a nice job. Every time I go into the shed I have my Rans S21 Outbound kit sitting there looking at me...calling out to me to start on her 😞 . This rebuild is the one I will be flying while I put the S21 together. Mabel should have been finished by now but as usual life got in the way and so did the time so even after a 1 year wait since I ordered my S21 that 1 year snuck up on me quite fast. The other thing of course was that this rebuild was not supposed to be a rekit either. if you go through the earlier parts of this thread you will see why it has been totally pulled apart literally to every single part and most of those parts have been remade so it has taken me somewhat a bit longer than I expected. 

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1 hour ago, Kyle Communications said:

When I get it finished 🙂

 

I am trying to get it done as fast as I can but still do a nice job. Every time I go into the shed I have my Rans S21 Outbound kit sitting there looking at me...calling out to me to start on her 😞 . 

Reward yourself with say 4 hours on Mabel, allows you one hour on the Rans.

 

No, no, 4 ON MABEL, and one on Rans.

 

That is literally how I control myself in the same situation.

Edited by bexrbetter

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