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sabre made in Belgium

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dirk tinck29/12/2019 00:39:01
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454 forum posts
721 photos

With the two brake assemblies ready it's time for another challenge : Mounting them in the fuse !

Getting them in the right place so that the panels follow the fuse her curvatures is the hard part here .

Normally that should be the drawing on the fuse but i found out the hard way that this is only in theory !

I had to make the opening a little bigger to move arround with the brake -set to find the right position.

In the end i got it right.20191227_225933.jpg

dirk tinck29/12/2019 00:52:55
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454 forum posts
721 photos

First test is to spray some black paint and give it a light sand to find the ''low''spots.After some filling and glassing this will be fine.

Next task is to place the other brake-set in just the same position so that they open and drop the same amount.

Same problem here: I had to make the opening bigger to find the right position. This resulted in some gaps to fill with balsa scrap and cyano.

The hinge pins can still be removed at this point. Not sure yet how i'm going to fix this when all is glassed and painted20191227_230020.jpg

dirk tinck29/12/2019 00:54:47
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454 forum posts
721 photos

20191228_223204.jpg20191228_223132.jpg20191228_223113.jpg20191228_222959.jpg

dirk tinck29/12/2019 01:05:54
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454 forum posts
721 photos

Before closing-up the fuse ,i'm going to prepare a servo tray and hook-up the two brakes on just one servo.

Time is running !!! cheers , Dirk.

Andy Meade29/12/2019 09:36:55
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2724 forum posts
698 photos

Excellent work Dirk, neat and accurate as always yes

Phil Cooke04/01/2020 20:29:33
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2385 forum posts
1638 photos

They are very impressive brake units Dirk, superb craftsmanship! thumbs up

dirk tinck04/01/2020 23:50:39
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454 forum posts
721 photos

Thanks Phil,I'm pleased with them myself !They are now operational with minimal weight increase.On with the rest !!

dirk tinck10/01/2020 23:40:08
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454 forum posts
721 photos

Good evening all !

With the speed brakes in place, i sorted out the servo tray's.Best position IMO is as close as possible to the wing saddle and as much forward as the fuse opening let's me . According to this position ,i placed the snakes and supported them as much as i could to avoid slop.20191229_223906.jpg

dirk tinck10/01/2020 23:41:00
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454 forum posts
721 photos

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dirk tinck10/01/2020 23:41:58
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454 forum posts
721 photos

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dirk tinck10/01/2020 23:47:37
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454 forum posts
721 photos

With the brakes operational it's time for the fin.I laminated two 6 mm balsa planks and cut out the fin and started to sand it as per plan.To get the shape right i drew a line at the thickest point and sprayed the fin with some black sanding guide to see where you sand : not touching the line !20200107_231541.jpg

dirk tinck10/01/2020 23:54:52
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454 forum posts
721 photos

With the sanding of the fin ,it is now to thin to fit properly between the ply supports so i glued some 4mm balsa to the bottom part and sanded the base to fit in the fin-opening.Also opened up the place where the belcrank for the elevator is supposed to come.

20200110_230349.jpg

dirk tinck11/01/2020 00:00:40
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454 forum posts
721 photos

Next are the fairings besides the fin .To get these right ,i first glued-on some balsa blocks for the exhaust and sanded them with some real-thing -foto's next to me to get the shape right.

From above it looks like this :20200110_230207.jpg

dirk tinck11/01/2020 00:01:46
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454 forum posts
721 photos

And with the fin in place it looks like this :20200110_230334.jpg

dirk tinck11/01/2020 00:06:28
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454 forum posts
721 photos

Tomorrow i'm doing the fairings at the bottom of the fin but still not glueing it in place because i want to glass it appart from the fuse.

A lot of sanding and fitting last week !

Cheers buddy's !

Gordon S11/01/2020 16:30:27
25 forum posts

very impressive work with the airbrakes Dirk!!! Real engineering skills!! Hope you dont mind, but I'm hoping to use some of your ideas with the airbrakes on the MIG15 drawings!!!

Not sure if its the photo angle, but looks like you have fairings parallel to fin?? is this intentional??

McG 696911/01/2020 17:42:24
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2904 forum posts
1099 photos

Great progress again, Dirk.

Your blog makes me wonder if I should be deciding for a rudder version or not... ?

Besides, the Sabre Dog fin & rudder are totally different to a 'standard' one, with the rudder (and fin) being taller but also narrower chordwise.

It's definitely a bit strange that we are communicating here in English instead of just Flemish, isn't it? ... wink

Cheers

Chris

dirk tinck11/01/2020 18:32:20
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454 forum posts
721 photos

Hi Gordon ,great you like the brake system !

As for the fairings , you mean seen from above ?I feel some doubt coming up !disgust

Hi Chris ! To rudder ,or not to rudder... seems to be we all have doubts...For me, the extra weight cutted the knot ! I'm tired of all the overweight planes !

As for the communication ,in dutch not a soul would know what we mean !!Exept maybe Monz Lyons ??(SA)smile d

Greetz , Dirk

dirk tinck11/01/2020 18:42:58
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454 forum posts
721 photos

@ Gordon S Hope this helps ?3778554022_f909571338_b.jpg

Gordon S11/01/2020 19:19:20
25 forum posts

Hi Dirk, Didnt mean to cause panic. just wanted to check you realised fillets were further apart at the front than over the engine exhaust?? Didnt want those nasty scale Police giving you hard time!!!!laughlaugh

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