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Fouga magister 1/4.5 moulded from scratch

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Dries Neyrinck23/09/2018 19:51:34
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Epic project Dirk! (like always... )

Going for another Wavre victory again ?

dirk tinck23/09/2018 21:42:20
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184 forum posts
323 photos
Let's get it in the air first Dries,There's a lot more things here than in a pss plane that can go wrong...
dirk tinck24/09/2018 23:14:32
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184 forum posts
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20180922_193426.jpgBack in my plane cave i glued the wing core halves together as well as the rest halves of the foam board.All with UHU por. I will need them to press the wing cores in between when covering them with balsa.After a little sanding they are ready to sandwich them . 110 cm of fouga wing cores ! Well ,they 're not going to be used to fly , but to mould them. A long way to go !20180921_230404.jpg20180924_232032.jpg

dirk tinck24/09/2018 23:26:27
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The strips of foam glued to the trailing edge side of the foam halves are there to support the balsa .In this area it's just balsa to balsa to become a sharp trailing edge.There is no foam in between,that would be to thick.I 'll post a pic. of this tomorrow for clarity.

Cheers , Dirk

dirk tinck25/09/2018 22:42:39
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184 forum posts
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As promised : Ttrailing edge set up20180925_224634.jpg

dirk tinck11/10/2018 23:24:56
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184 forum posts
323 photos
  • 20181011_230623.jpg20181011_220525.jpg20181011_220408.jpgHi all,it's been a while sinds i posted due to a pss weekend in Calais,my wife being hospitalised,but i havent been resting. There's a lot to think about when making wing-plugs like servo positions,landing gear,flaps ,ailerons,etc.

Tonight i prepared the wing skins in 2mm balsa. I ordered 125x20 cm planks and glued together 4 pairs.

taped them together,turned them arround,opened the gap and zapped with green zap.Pressed down and sanded the seam right away.No worries for little gaps as the sanding dust fills them up , done20181011_210956.jpg

dirk tinck11/10/2018 23:32:04
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184 forum posts
323 photos

The plan is to make gear door openings,servo hatches and air brake openings in the plugs before moulding.

foto for example20181009_195633.jpg

dirk tinck11/10/2018 23:42:19
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184 forum posts
323 photos

I also ordered the landing gear from Electron retracts after a lot of studying scale drawings and mesuring.

I hope they will soon be here so i can test-fit them in a foam core .I have kept a few with cutting defaults.

So long builders !!

dirk tinck18/10/2018 22:51:53
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184 forum posts
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Hi all,yesterday my retracts were delivered so let's fit.

first i positioned the retract opening according to the scale drawing20181017_214934.jpg

dirk tinck18/10/2018 22:54:06
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184 forum posts
323 photos

Second to that i made the opening in a test-piece of wing20181017_225521.jpg

dirk tinck18/10/2018 23:02:36
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184 forum posts
323 photos

Trouble in paradise !! The wing section is to thin to take the wheels ! In fact this is what i expected...

I could look for thinner wheels but the ones i ordered are very light and robust and have the right shape.

Only other option is to make the wing section bigger in the area of the wheels. In fact that will make the wing more scale as the real thing has this too (picture)20181017_235216.jpg

dirk tinck18/10/2018 23:11:34
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184 forum posts
323 photos

So !! back to foam cutting !

First dig-up the profili program and change the inner wing section some 10% thicker,make up some new aluminium ribs and foam blocks. This is only for the first 30 cm of the wing(retract area)This part will now be 73 mm instead of 62 mm thick.I hope that'e enough ! Back to test fit ! Cheers!20181018_221408.jpg

McG 696919/10/2018 08:34:09
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2469 forum posts
976 photos

Still following, Dirk. yes

Will the center section of the wing be part of the fuselage w/ removable wing tips or is it a one piece wing?

Cheers

Chris

dirk tinck19/10/2018 17:24:45
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184 forum posts
323 photos

Hi,Chris,the plan is two removable wings,just the first rib will be part of the fuse.Aviation design made the inner section of the wing to be part of the fuse but that one has a wingspan of 3m10...I saw a copy fly on a EDF 128mm and 14s with a weight of 17kg(Jorg Rehm)and did just fine ! My PSS model weighs 8kg,so i'm trying to stay under 12kg auw(EDF)

dirk tinck19/10/2018 23:36:54
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184 forum posts
323 photos

20181019_224636.jpgNot much progress today,

Cutted the aluminium ribs and prepared the foam blocks for the wings inner sections.

Drawn the line that represents the middle of the ribs,it has to be in the exact same position as on the rest of the wings.20181019_224231.jpg

dirk tinck27/10/2018 23:15:58
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184 forum posts
323 photos

The new center cores wire cutted20181020_232314.jpg

dirk tinck27/10/2018 23:21:29
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184 forum posts
323 photos

Replaced the old center cores by the thicker -ones20181021_230603.jpg

dirk tinck27/10/2018 23:25:22
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184 forum posts
323 photos

20181022_222450.jpgLooking at the frontside you can clearley see that the thickness of the wing increases towards the root20181021_230704.jpg

dirk tinck27/10/2018 23:29:47
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184 forum posts
323 photos

20181023_221528.jpgAgain i made the retract opening in a test center core.This time the retract sits completely in the wing,i even have some space left20181023_221515.jpg

dirk tinck27/10/2018 23:35:30
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184 forum posts
323 photos

Transfered the plan lines and the servohatch positions onto transparent paper ,then overdrawn them on the wingshells20181026_214746.jpg

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