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SFS 31 Milan

Fans and Thermals.
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Noël Rumers
Posts: 270
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

Hi Dave,
Very nice model indeed!!!

More work was done to the exhaust and it is ready to go now. Took me a while, to go piece by piece, to work on the top exhaust pipes and get those fixed with the engine bottom screws.
I used two wedges to hold the 4 small pipes in place to being able to braze them to the flat tube. Secured this way I was able to work my way bottom up. The second exhaust pot at the bottom was fitted with a tube, elbow and more to end up to the top exhaust pipe.
Worked fine and lucky me, made no mistakes, all fitted perfectly the first time.
The cleaning was in the end the hard bit ;)
Now the carburetor controls will be installed, saying the servos to control the choke and starter.
With that done the gear retract has to be installed next.
From there on the fuselage building can be taken on to the finish.
Noël

BTW I misted the fly-by of the Vulcan last weekend, but who was at the controls you think...
High ladder to get at the controls 8-)
Or was it a dream...however...
Attachments
2013 Sept 16 UK0043.JPG
2013 Sept 16 UK0044.JPG
2013 Sept 16 UK0050.JPG
2013 Sept 16 UK0058.JPG
2015 10 160004Milan scaled exhaust.JPG
2015 10 160005Milan scaled exhaust.JPG
2015 10 160006Milan scaled exhaust.JPG
2015 10 160007Milan scaled exhaust.JPG
2015 10 160009Milan scaled exhaust.JPG
2015 10 160010Milan scaled exhaust.JPG

User avatar
Noël Rumers
Posts: 270
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

...more exhaust steps...
Attachments
2015 10 160011Milan scaled exhaust.JPG
2015 10 160014Milan scaled exhaust.JPG
2015 10 160015Milan scaled exhaust.JPG
2015 10 160016Milan scaled exhaust.JPG
2015 10 160017Milan scaled exhaust.JPG
2015 10 160018Milan scaled exhaust.JPG
2015 10 160019Milan scaled exhaust.JPG
2015 10 160020Milan scaled exhaust.JPG
2015 10 160022Milan scaled exhaust.JPG
2015 10 160023Milan scaled exhaust.JPG

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Noël Rumers
Posts: 270
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

...more fitting...
Note that I did close the flat tube only than when all drilling and cutting was done.
Noël
Attachments
2015 10 160024Milan scaled exhaust.JPG
2015 10 160025Milan scaled exhaust.JPG
2015 10 160027Milan scaled exhaust.JPG
2015 10 160028Milan scaled exhaust.JPG
2015 10 160029Milan scaled exhaust.JPG
2015 10 160030Milan scaled exhaust.JPG
2015 10 160031Milan scaled exhaust.JPG
2015 10 160033Milan scaled exhaust.JPG
2015 10 160035Milan scaled exhaust.JPG
2015 10 160037Milan scaled exhaust.JPG
Last edited by Noël Rumers on 16 Oct 2015, 23:22, edited 1 time in total.

User avatar
Noël Rumers
Posts: 270
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

And the finish!!!
looks nice, hope the sound will be as good as it looks!

Noël
Attachments
2015 10 160038Milan scaled exhaust.JPG
2015 10 160041Milan scaled exhaust.JPG
2015 10 160042Milan scaled exhaust.JPG
2015 10 160043Milan scaled exhaust.JPG
2015 10 160044Milan scaled exhaust.JPG
2015 10 160045Milan scaled exhaust.JPG

Dion Dunn
Posts: 54
Joined: 14 Jul 2015, 02:08

Re: SFS 31 Milan

Post by Dion Dunn »

Very nice craftsmanship Sir! It's almost ashame to cover any of it up.
Dion

Hobby Jackson

Re: SFS 31 Milan

Post by Hobby Jackson »

Very cool, this is an airplane I would build! Where would I find a kit for this or did you make everything your self?
Thanks,
Hobby

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Peter Balcombe
Posts: 1226
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SFS 31 Milan

Post by Peter Balcombe »

Many thanks for that information Bob.
Noel is in the final stages of checking out a new design for a 1/3 scale Milan (IC powered) and I will be making a 1/4 scale electric powered model from the same design (rescaled) so wondered what a suitable electric setup would be.
The similar, but shorter wingspan RF4, from the Mick Reeves stable has a recommended electric setup of a 3548 900kv motor on 4S I think which appeared a little underpowered I thought - intended for a 40-60 IC engine.
Peter

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Noël Rumers
Posts: 270
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

Hi guys,

the 1/4 scale one looks great to me but a bit small.
I like them a bit bigger, they fly better and the best part, they soar much better too.
At this very moment I have the 1/3 scaled drawing ready. This needs a few changes due to minor mistakes that got into designed parts.
I almost know all that needs to be changed. All will be altered as soon as the last bits are glued onto the fuselage.

The Milan was based on the RF4 fuselage, "BUT"...it isn't the same, specially on the wing joiner area.
All was measured by the owner of the G-KORE for me and with the help of a lot of good pictures the RF4 design was altered to make it into the SFS 31 Milan.
I will have the drawings ready very soon, scan them into PDF and make them available for free.
The wing was tested twice yet. One time on a 1/3 not to scale fuselage, by my good friend and once on a 1/2.5 scaled altered RF4 from German ARF kit.
Due to being an over 20 kg model for the last one, all was tested due to regulations with help of the LMA.
MW in July I was able to see it the first time fly and was happy to soar together with Bob's very nice make over.
The original airfoils are used for his and our design. The same airfoil as on my SF27 B M on building thread in this site.
More on the Milan wing, elevator and rudder will follow very soon now, so just see what comes next... ;)
I will do a cowl and canopy for it with the possibility to reproduce them. Have bought the Mick Reeves 1/3 scaled cowl and canopy, but due to a cowling change and higher canopy, no good...
If someone want these to build the M.R. RF4...available for half price.

See the cowl of the D-KORE before and after the change...and the RF4...
See also the difference on the canopy and the turtle back behind it, the first two formers are lifted a bit...
See also the bottom on the RF4, the spruce skids, on the RF4 they are straight, on the Milan they have a very good curve and they are lowered in the centre as wide as the retract bay...On the RF4, the wing is in one piece, the Milan has two parts, one LH and one RH, joined like glider wings to the fuselage. Our model will have four parts for easy transport with a removable rudder and elevator too.
More on these differences later on.
Noël
Attachments
1472873.jpg
D-KORE 2.jpg
D-KORE 7.jpg
Blanik_L13_054_Model_builder_1981.jpg
DSCF7663.JPG
0870001parts milling.JPG
DSCF7675.JPG

User avatar
Noël Rumers
Posts: 270
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

The servo and fuel tank trays are in now.
The tray of the fuel tank must be cut to length later on when I know where the instrument panel will go.
Both servos for throttle and starter/choke are installed and a 3 mm push rod tube is glued in to guide the cables that will be connected between the carburetor and these servos.
The cables are on the carburetor and cut off long enough so that later on, when all is finished and the engine can stay on, these two cables can be connect on the servos to the required lengths.
I always use these cables, in fact fishing lines, cheaper than you get them in a model shop sometimes, to connect the carburetor with the servos, this way no or less stress comes to these servo... ;). See also how the servo for the starter/choke works.
To connect the line on, both the carburetor and servo wheels or arms, the same few bits are used.
Two cut rings of fuel tube, an 6 mm long push rod guiding tube, a bold, nut and washer, M2 and "NO" glue. The small rings slip over the tube and press them either end so the cable will fit in between. Easy not? You need of both the choke and throttle a spring on your carburetor...see before...
At last you need a 3 pos. switch on the TX. One end is the big wheel with connecting shaft, is place so that is not pulling anything. Mid pos. the starter will go due to, see the small white angled disk, it presses the contact switch to run the starter.
If the engine has been standing, e.g. one week or longer, there is no fuel in the carburetor. You need a finger in the carburetor and turn, some do that...to get fuel up front. With the starter, you do it otherwise. Now you open up your throttle first, fully!!! The other end of the 3 pos. switch will turn the wheel even more, so the cable will pull the choke valve fully closed, while the starter still is running, see the disk still pressing the switch.
The moment the engine wants to go, if you are fast enough, closing the throttle and switching at the same time the 3 pos. switch to its zero position, the engine will run. If not just restart and running!!!
The trim of the throttle is for starting always so far open that the engine will run on the low RPM setting, so the model stands, and for safety I put my leg(s) in front of the elevator.
The tail wheel shaft is also drilled and mounted on now...
Now the servo motor to control the main gear will be installed.

Noël
Attachments
2015 10 180001throttle and choke control.JPG
2015 10 180002throttle and choke control.JPG
2015 10 180003throttle and choke control.JPG
2015 10 180004throttle and choke control.JPG
2015 10 180005throttle and choke control.JPG
2015 10 180006throttle and choke control.JPG
2015 10 180007throttle and choke control.JPG
2015 10 180014throttle and choke control.JPG
2015 10 180015throttle and choke control.JPG

User avatar
Noël Rumers
Posts: 270
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

...more pictures...
Attachments
2015 10 180010throttle and choke control.JPG
2015 10 180011throttle and choke control.JPG
2015 10 180012throttle and choke control.JPG
2015 10 180013throttle and choke control.JPG
2015 10 180016throttle and choke control.JPG
2015 10 180017throttle and choke control.JPG
2015 10 180018throttle and choke control.JPG
2015 10 180001Milan tailwheel.JPG
2015 10 180003Milan tailwheel.JPG
2015 10 180004Milan tailwheel.JPG

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