SFS 31 Milan

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Noël Rumers
Posts: 261
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers » 04 Oct 2015, 22:52

More work was done to get the engine to the firewall and prepare for the exhaust.
This is always a bit fiddling with the space and the parts.
All must fit under the exhaust box and cowl...
However the exhaust flange was connected to the engine and the elbow installed with the first half of the exhaust pot.
If you see the partly finished exhaust off the engine, all looks really mess up!!
But due to side trust, engine angle etc, all works out fine once screwed to the engine while on the firewall.
I use a fine felt-tip pen to mark the position before brazing things together.
Now I have to decide to go for the scaled exhaust on both sides or just fake once with a tube going out downwards...
I sleep over this problem tonight... ;)
Noël
Attachments
2015 10 010001starter finish and firewall.JPG
2015 10 020001exhaust fittings.JPG
2015 10 020002exhaust fittings.JPG
2015 10 020003exhaust fittings.JPG
2015 10 040001engine to firewall with exhaust.JPG
2015 10 040002engine to firewall with exhaust.JPG
2015 10 040003engine to firewall with exhaust.JPG
2015 10 040004engine to firewall with exhaust.JPG
2015 10 040005engine to firewall with exhaust.JPG
2015 10 040006engine to firewall with exhaust.JPG

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Noël Rumers
Posts: 261
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers » 04 Oct 2015, 22:58

...and more...
I use the fiber glass reinforced brush on the drilling machine, it is safer than the metal ones.
No pins fly out while grinding the brazing etc...
Noël
Attachments
2015 10 040007engine to firewall with exhaust.JPG
2015 10 040009engine to firewall with exhaust.JPG
2015 10 040010engine to firewall with exhaust.JPG
2015 10 040011engine to firewall with exhaust.JPG
2015 10 040012engine to firewall with exhaust.JPG
2015 10 040013engine to firewall with exhaust.JPG
2015 10 040015engine to firewall with exhaust.JPG
2015 10 040016engine to firewall with exhaust.JPG

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Noël Rumers
Posts: 261
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers » 06 Oct 2015, 13:39

We decided to build a removable front hatch. This way one can get to the servos up front to control the engine and starter as well as access to the fuel tank and possibly the batteries.
These formers had to be designed and made.
A quick fit shows the size of the space underneath this hatch. I know now to the fuel tank will fit easy underneath it as well.
Two kind of fuel tanks are shown to be able to taken the best fit, but both are OK.
For the exhaust, the night has given me a thought, like always if you get to the point of counting sheep...
See what I found that could be used. Need more 10x.0.5 mm steel tube now,

Noël
Attachments
2015 10 040017engine to firewall with exhaust.JPG
2015 10 050001fuselage front cover.JPG
2015 10 050004fuselage front cover.JPG
2015 10 050006fuselage front cover.JPG
2015 10 050007fuselage front cover.JPG
2015 10 050009fuselage front cover.JPG
2015 10 050010fuselage front cover.JPG
2015 10 050011fuselage front cover.JPG

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Noël Rumers
Posts: 261
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers » 09 Oct 2015, 22:00

Hi, yes I am still working on the exhaust.
A few things had to be sorted in my cellar too.
Now I have a nice table to work from...
The exhaust...
I went for a scaled working exhaust seen a few years ago on this site.
The flat tube I have is something they use in wardrobes to hang your coat hangers onto.
Very useful and not too strong. I made some V-cuts to bend it and brazed it back together.
In the end I also made the exhaust tube holder separately.
This way the tube could be clamped in the milling machine to drill the two holes for the small tubes with holes in.
Some calculation was done to see how much exhaust surface I had in different places in the complete exhaust.
The drilling of the holes in the tubes were tested first. Hand drilling showed me that no one hole was in line...so a no go this way.
The milling machine made this easy, just counting the 3.5 mm for each next hole, 16 of them.
Now the link between the oil filter second pot and the flat tube must be made.
See the result so far.
Noël
Attachments
2015 10 060001scaled exhaust.JPG
2015 10 060004scaled exhaust.JPG
2015 10 060006scaled exhaust.JPG
2015 10 060008scaled exhaust.JPG
2015 10 060009scaled exhaust.JPG
2015 10 060010scaled exhaust.JPG
2015 10 060011scaled exhaust.JPG
2015 10 060013scaled exhaust.JPG
2015 10 060014scaled exhaust.JPG
2015 10 060016scaled exhaust.JPG

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Noël Rumers
Posts: 261
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers » 09 Oct 2015, 22:06

...and more...
Attachments
2015 10 080001scaled exhaust.JPG
2015 10 080005scaled exhaust.JPG
2015 10 080006scaled exhaust.JPG
2015 10 080009scaled exhaust.JPG
2015 10 080010scaled exhaust.JPG

rossco
Posts: 60
Joined: 30 Mar 2015, 18:56

Re: SFS 31 Milan

Post by rossco » 15 Oct 2015, 02:54

Hi Noel I was looking at the 90 degree bends around your exhaust pipes, have you ever tried the process called hydro bending where you make header pipes from flat sheet seem weld them and pump them up using 1600psi of water preasure from a high pressure washer? it allows you to make tight radii tubing from 1.5mm stainless flat sheet this is how my buddy Dave made my header pipes for my Pawnee.

Watch "HydroForming with a Pressure Washer-PULSE JET" on YouTube
https://youtu.be/bCsg5pQimWI
Attachments
20151003_181515.jpg

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Noël Rumers
Posts: 261
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers » 15 Oct 2015, 09:44

Hi Rossco,
it's the workshop...
He has a different one. The way I am doing this is less complicated for me ;) .
The film however is looking great!!! and all the others behind it too... ;)

Today I will get back to finish my exhaust.
Had a few other things to sort out first...done now!
The rear attachment plate of the K14 landing gear had pushed out the former where it was bolted to.
This was the only thing I didn't reinforce on this gear...now taken care off too.
Next was a problem with the ailerons on a bird. They didn't work on the other project, steering to the LH make it turn to the RH and visa versa...
Not good, now spoil flaps are just behind the main spar. Opening up the wing on the top, to be able to get reinforcements in.
Now all controls are fine, even so that with only 1 cm up one side, the bird turns to that side without use of the elevator.
Ailerons are closed up.
Noël
Attachments
2015 10 130001Rear retract repair and reinforcement.JPG
2015 10 130002Rear retract repair and reinforcement.JPG
2015 10 130007Rear retract repair and reinforcement.JPG
2015 10 130008Rear retract repair and reinforcement.JPG
2015 10 130011Rear retract repair and reinforcement.JPG
2015 10 130018Rear retract repair and reinforcement.JPG
2015 Buzzard wing 0042.JPG
2015 Buzzard wing 0044.JPG
2015 Buzzard wing 0049.JPG
2015 Buzzard wing 0050.JPG

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Noël Rumers
Posts: 261
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers » 15 Oct 2015, 14:36

...by the way...I did miss the MW event last weekend...
However at our club we had also a smal meeting with guys from two clubs nearby.
See a few pictures.
Noël
Attachments
2015 10 100010De condors mini meeting Mach.JPG
2015 10 100012De condors mini meeting Mach.JPG
2015 10 100013De condors mini meeting Mach.JPG
2015 10 100015De condors mini meeting Mach.JPG
2015 10 100016De condors mini meeting Mach.JPG
2015 10 100019De condors mini meeting Mach.JPG
2015 10 100021De condors mini meeting Mach.JPG
2015 10 100023De condors mini meeting Mach.JPG
2015 10 100026De condors mini meeting Mach.JPG
2015 10 100027De condors mini meeting Mach.JPG

rossco
Posts: 60
Joined: 30 Mar 2015, 18:56

Re: SFS 31 Milan

Post by rossco » 16 Oct 2015, 03:28

nice work as always Noel.

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Dave Smith
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Joined: 18 Mar 2015, 00:44
Location: Bowen Island, BC, Canada

Re: SFS 31 Milan

Post by Dave Smith » 16 Oct 2015, 17:06

Noel,

Some pictures of a nicely done electric D-KORE built by a friend of mine in British Columbia....
Attachments
Milan 1.JPG
Milan 2.JPG

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