M100S

Let us all watch your new project progress.
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RobbieB
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Re: M100S

Post by RobbieB » 12 Apr 2016, 16:19

Brake sheeting going on leaving each blade standing a little proud until the covering and a couple of coats of primer have been applied - then sanded back flush. A right chore!

I seem to remember when I did my M200 I applied each piece of sheeting to include one set of blades complete but I've found this time it is very time consuming trying to get two slots accurately positioned in one piece of ply so individual blades at a time it is.
brake_sheeting.jpg

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terry white
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Re: M100S

Post by terry white » 12 Apr 2016, 18:42

This is excellent work Robbie, a lesson in modelling perfection, Flying friends from Middle Wallop tell me that if I were to ask you really nicely you would build me one!! :D :D

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RobbieB
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Re: M100S

Post by RobbieB » 12 Apr 2016, 21:48

Terry,

By the time I get these b****y brakes boxed off and I can concentrate on getting the the rest of the model finished I think I will just about be ready to take a life - probably my own!!

Coming up the Mynd this year?

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terry white
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Re: M100S

Post by terry white » 13 Apr 2016, 20:36

Robbie, don't get into too much of a tis-was over those dam brakes,I hear Graupner or multiplex still have some they will sell you,and if you'r still looking to take a life I'm not coming any where near Shropshire for a couple of years. :lol: :lol:

Joking aside Lindy and I enjoyed all your guys company so much last year that we hope to attend both get togethers this year, so cook me a sausage for supper, medium rare. :lol: :lol: ter.

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RobbieB
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Re: M100S

Post by RobbieB » 09 May 2016, 17:08

Wing tip block retaining plates.

Like the full size, the frise aileron outer hinge pivot is incorporated into this but unlike the full size this is obviously removable. Withdraw the two bolts, the tip block comes off and the aileron can then be removed should needs be.

Unlike the full size I will not be replicating the tip protectors with tie down holes as I got fed up with them getting ripped off my 200 during heather slope landings.

The plates to trim to size and balsa blocks to add.
end_plate_1.jpg
end_plate_2.jpg

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RobbieB
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Re: M100S

Post by RobbieB » 02 Jun 2016, 22:07

top_sheeting.jpg
Top sheeting being added with the wing supported on its profile supports to retain the correct incidence. The wing needs all the supports shown to avoid any distortion as a consequence of the iron pressure during the hot PVA gluing process.
frise_hinge.jpg
Centre hinge for the frise ailerons - only three hinges on each aileron and all will be installed and pinned before the ailerons are cut from the wing.

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RobbieB
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Re: M100S

Post by RobbieB » 22 Jul 2016, 22:13

Aileron hinges installed 2mm below the surface of the aileron and the aileron cut free.

I breathed a sigh of relief when the released surface moved freely throughout its travel.
aileron_hinge_2.jpg
In fact free enough to rotate almost 180 degrees down without binding.
aileron_hinge_3.jpg
Problem is, the whole assembly is designed to be held in position by the removable tips but unfortunately I have discovered in order to then slide the aileron out of the centre and inboard hinges, the aileron spar has to be cut away leaving little more than the fabric covering holding the two halves together. Not good. So, the centre and inboard hinges will have to be modified using removable pins (as per full size) and the centre hinge bracket also modified by reducing its depth considerably. Ah the joys of prototyping.

6mm balsa to be added to the LE of the aileron to be shaped to give a rolling clearance over its travel within the shroud.

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RobbieB
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Re: M100S

Post by RobbieB » 06 Aug 2016, 17:52

The frise aileron with its leading edge applied - difficult to get the correct rolling clearance over the whole travel.

The gap underneath really opens up on the down going side and the hinge geometry is set almost identical to the full size.
aileron_le.jpg
The leading edge profile.
aileron_le_2.jpg

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RobbieB
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Re: M100S

Post by RobbieB » 22 Jul 2018, 17:20

Ah, another Phoenix rises from the ashes (as does the balsa dust).

Profiling the aileron leading edge shrouds on the right wing - what a faff. The profile is not a straight radius, it changes top to bottom and has to be identical in both wings as the gap at the underside changes depending upon the ailerons position so it's got to be right in both wings.

frise_shroud_rw.JPG

To further complicate matters, you will see from the photos below the gap increases from root to tip. Anyone any ideas as to why?

mesange4.JPG
mesange 7.JPG

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Cliff Evans
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Re: M100S

Post by Cliff Evans » 22 Jul 2018, 18:34

Ahh so glad you have started this build again. Lovely subject and those brakes! No idea why that gap in the ailerons is as it is!

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