Don't forget to check your spam folder if you don't get an activation email after joining!!

SFS 31 Milan

Fans and Thermals.
User avatar
Noël Rumers
Posts: 319
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

... the next day I did cut all to shape as close as I could before drilling out the foam. The tape was pulled out without too much effort.
A few cuts and grinding to make all fit to the speakers and their boxes.
The plastic on the inside was also removed and the fit was perfect!
The speakers got the wiring and in each box at the rear got a 13 mm hold to allow the air to move when the membrane goes back and forward...
20 W speakers will do I believe, but a test will tell me afterwards if that was enough...
The elbows also got a bit of paint and all was mounted with straps to the two bottom distance pieces of the motor.
Attachments
20210329_155725_resized.jpg
20210329_155743_resized.jpg
20210329_155839_resized.jpg
20210329_155846_resized.jpg
20210329_160005_resized.jpg
20210329_160022_resized.jpg
20210329_160156_resized.jpg
20210329_160208_resized.jpg
20210329_232045_resized.jpg
20210329_232056_resized.jpg
Last edited by Noël Rumers on 06 Apr 2021, 00:31, edited 1 time in total.

User avatar
Noël Rumers
Posts: 319
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

...once in place the rest of the electronics could be put in. I used Velcro tape to do this.
The wires where sorted so all is safe to fly the model now.
All fits very well under the cowl and yes I ran the motor with the sound of music... ;)
Attachments
20210331_145826_resized.jpg
20210331_145833_resized.jpg
20210401_115928_resized.jpg
20210401_115936_resized.jpg
20210401_120224_resized.jpg
20210404_184021_resized.jpg
20210404_184033_resized.jpg

User avatar
Cliff Evans
Posts: 482
Joined: 29 Dec 2019, 15:13
Location: Bristol
Contact:

Re: SFS 31 Milan

Post by Cliff Evans »

Another work.pf art Noel.
https://lasercutsailplanes.co.uk
https://patteaklegliders.co.uk

john greenfield
Posts: 560
Joined: 18 Mar 2015, 07:52
Contact:

Re: SFS 31 Milan

Post by john greenfield »

Noel

Fantastic work with the sound system but I see it fills the air exit holes in the cowl completely. How are you going to get cooling air for the motor and speed controller out of the cowling?

AEB
AEB = Aeronautical Energiser Bunny (with thanks to CW)

User avatar
Noël Rumers
Posts: 319
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

Hi Cliff and John,
Thanks!!!
The gap is not completely sealed off at the exhaust opening.
Also the real Milan or see the RF4 have at the bottom an opening where the hot air can get away.
This will also cool the motor battery down.
So I thought about these things too but the first test run of the motor with the Amps it drew out looks OK to me now. Further test will follow but then I need to do this in the open with the wings on.
At this very moment no painting weather at all, we have snow and hail... :cry:
I did run the motor with sound and the cowl on, I will try to upload the film later.
This has also shown that the motor is not to hot as well as the batteries...
I will however keep an eye on these things, you don't want to mess up...
In the end I always can add some vanes in to guide the air if necessary. But that means again extra work... :roll:
Attachments
Normally there is an angled metal sheet in this gap. I will leave it as it is...
Normally there is an angled metal sheet in this gap. I will leave it as it is...
20210306_175406_resized.jpg
20210306_175429_resized.jpg
0830001parts milling.JPG
1358172-large (2).jpg
20210325_180425_resized.jpg
20210325_180437_resized.jpg
You see the hole in the bottom of the fuselage. You also see the +/- 5 to 6 mm gap between the cowl and the elbows.
You see the hole in the bottom of the fuselage. You also see the +/- 5 to 6 mm gap between the cowl and the elbows.
It looks if the air is traped under the cowl, but it isn't. There are gaps all over where the air can run freely. Also the controler will be cooled enough...
It looks if the air is traped under the cowl, but it isn't. There are gaps all over where the air can run freely. Also the controler will be cooled enough...

User avatar
Noël Rumers
Posts: 319
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

...with the sound system OK now the instrument panel was to be finished.
I had a good picture of the real instrument panel and that was the basic thing.
I turned flat disks in POM or turnable black nylon. I used Tec7 to glue a few parts in. Once cured this is a firm rubber substance and paintable!
With the printer I scaled the pictures of the instruments down to size. A clear tape when on them and a double sided tape at the back. The rest was scissors work and very small fingers...and some time!
Attachments
20210408_152455_resized.jpg
20210408_152521_resized.jpg
20210408_161610_resized.jpg
20210408_161630_resized.jpg
20210409_143742_resized (2).jpg
20210409_143750_resized.jpg
20210409_143850_resized.jpg
20210409_175553_resized.jpg
20210409_175605_resized.jpg
20210409_175834_resized.jpg

User avatar
Noël Rumers
Posts: 319
Joined: 20 Mar 2015, 10:29
Location: Hoboken Antwerp

Re: SFS 31 Milan

Post by Noël Rumers »

...at the left hand side I did build in my receiver switch and the battery system control lamps.
Now the bottom of the instrument panel needs some work, but that will come soon.
And then that one instrument was a special one, not happy with the result now but still…

The rudder was also connected to the servo as well as the tail wheel. And with one screw can the removable rudder be taken off the fuselage for easy transport. The hole was drilled, 2 mm into the two blocks of ply either side of the rudder tug. Cliff Charlesworth way, I learned it from him.
Than drilled on side only with dia 4.3, taped with M5 just one block of ply. I put the fuselage ten on the side and put a few drops of Cyano glue in. Let it set into the ply and make sure all is hardened properly with kicker. Then I run the M5 tap again in the hole to clean it. After that the bold will grip in the hole without the change to turn lose without help. DO NOT OVERDO the tightening of the screw!!! When the wooden threat is turned/pulled out, you have a problem...
Attachments
20210409_181843_resized.jpg
20210409_182414_resized.jpg
20210409_230520_resized.jpg
20210409_230531_resized.jpg
20210409_230916_resized.jpg
20210409_230922_resized.jpg
20210409_230930_resized.jpg
20210409_230939_resized.jpg
20210409_230958_resized.jpg
20210409_231059_resized.jpg

Post Reply