M100S

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

Post by RobbieB » 23 Jul 2018, 11:24

.................and they won't be like that on the model Cliff because to my eternal shame I have only recently noticed that. Everything is now set in stone and isn't going to be changed.

I suppose I will just have to come to terms with the night terrors and bed wetting, waiting for the Scale Police to get on my case.

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Cliff Evans
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Re: M100S

Post by Cliff Evans » 23 Jul 2018, 11:24

:lol: :lol: :lol: :lol: :lol:

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chris williams
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Re: M100S

Post by chris williams » 23 Jul 2018, 13:32

I suppose I will just have to come to terms with the night terrors and bed wetting, waiting for the Scale Police to get on my case.

Might as well be hung for a sheep as a lamb, Robbie...paint a fake moustache on the front then sit back a wait for the explosion!

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Barry_Cole
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Re: M100S

Post by Barry_Cole » 23 Jul 2018, 13:36

Don't you have an I-CROZ to fix????

:roll: :roll: :roll: :roll:

BC

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RobbieB
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Re: M100S

Post by RobbieB » 18 Jan 2019, 22:40

I have been thinking about how to go about the aileron pushrod shrouds on the 100 which are almost certainly glass on the full size:

Carmam-M100-59.JPG

To make such a thin thin walled shroud I opted to do the same. Unfortunately when I opened my bottles of epoxy laminating resin the catalyst was a most definitely 'off' colour.

So, make the plug out of balsa - too small and fiddly to use foam:


shroud_plug.jpg

Pull a small piece of light glass cloth over the plug as normal:

shroud_cloth.jpg

Soak with watery cyno:

shroud_cyno.jpg

Trim off and repeat with second layer and then remove the balsa plug with the Dremel leaving a nice, thin walled, flexible but strong shroud:

shroud_hollow.jpg

That one is a bit rough as it was the first experiment.

The big advantage here is, it's very quick and you don't have the inconvenience of mixing up the epoxy resin or trying to keep the glass cloth in contact with the very small plug while it cures.

I think the real secret of success here is knowing when to put the Dremel down and finish hollowing out with sandpaper.

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Cliff Evans
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Re: M100S

Post by Cliff Evans » 18 Jan 2019, 23:07

What a good idea Robbie.

John Vella
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Re: M100S

Post by John Vella » 19 Jan 2019, 09:14

RobbieB wrote:
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
Robbie the reason for the increasing gap towards the tip is to increase venting and drag which helps with adverse yaw on rolling the glider. It is of little consequence in our realm of flying. Even the Scale Police would have been very eagle eyed to spot it on the model. Keep going , good work. Regards John.

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RobbieB
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Re: M100S

Post by RobbieB » 19 Jan 2019, 11:20

Thanks for that info John, I knew there had to be a reason for it.

I'm sure you're right, none of this should matter a lot down at our scales but that said, I have no idea how these frise ailerons are going to perform.

Anyway, after the nightmare they have been I'm more than ready for the Scale Police. Certain phrases containing references to personal anatomy and sunshine immediately spring to mind....................

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Scale Police
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Re: M100S

Post by Scale Police » 19 Jan 2019, 16:39

Hello, hello, hello! What's all this then?

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B Sharp
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Re: M100S

Post by B Sharp » 19 Jan 2019, 17:42

Robbie, I was also worried about the effectiveness or lack of when I built the frise ailerons on my 1:3.5 scale Oly 463. I shouldn't have bothered my little head about them - they handled exactly like ailerons - they banked the model perfectly.
Brian. ;)

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