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Jilles Smits 1/3 scale SG38

Let us all watch your new project progress.
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Peter Balcombe
Posts: 1042
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Jilles Smits 1/3 scale SG38

Post by Peter Balcombe »

Attention has now turned to fixing the pilot figure (kindly supplied by Wilson) onto the seat using shoulder & lap straps as on the full size.

The full size has attachment points for the shoulder straps on/on the rear of the main mast roughly level with the top of the seat, whilst the lap straps attach via wire strops to points near the aileron cable attachment bar mounted on the top of the fuselage box, just behind the mast base.

I decided to make up two simple brackets, attached to the rear of the main mast & on the top of the fuselage box as shown below. M2 clevises and C/L adjusters allow easy removal and minor tension adjustment, with small piano wire loops (easily made with a K&S small wire bender) linking the harness straps to the C/L adapters.

The photos below show the general arrangement with the initial C/L wire loop strops, and then with the replacement piano wire ring (like a key ring loop) links.
Attachments
Harness attachment brackets
Harness attachment brackets
Piano wireloops
Piano wireloops

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Jilles Smits 1/3 scale SG38

Post by Peter Balcombe »

A rigging day today, with 10 out of the 14 wires now made up (lower wing mid & rear).
Meanwhile, the control stick has received its handgrip and Cliff''s 3D printed top stopper has been fitted (photo when paint touch up has dried).
Seat back cushion has received its covering of material & is attached using Velcro.
Nearly ready for balancing & final weighing ;)
Attachments
With rigging_small.jpg

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Jilles Smits 1/3 scale SG38

Post by Peter Balcombe »

And the completed joystick with cord grip :)
Attachments
Joystick grip
Joystick grip

StephenB
Posts: 129
Joined: 26 Dec 2018, 08:45
Location: Hungary

Re: Jilles Smits 1/3 scale SG38

Post by StephenB »

Beautifully done Peter, great attention to detail!

I'm guessing that your heart may be fluttering a little on the maiden ..........

john greenfield
Posts: 542
Joined: 18 Mar 2015, 07:52
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Re: Jilles Smits 1/3 scale SG38

Post by john greenfield »

Cliff Evans wrote:
30 Apr 2019, 17:17
Peters will not be but mine might be!!!
I am always available to help.

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

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Jilles Smits 1/3 scale SG38

Post by Peter Balcombe »

An initial balance indicated that I needed to put around 1.5Kg up front to a achieve the recommended CoG position (151mm from wing LE).
As the internal ballast box will only take 500g, the rest is located in 4 cylinders mounted on additional brackets in a manner very similar to that used on the full size.
The photo below shows the arrangement mock-up.
The rear brackets are bolted to each other through the fuselage, whilst the front brackets have since been silver soldered to the nose bracket and will also have a bolt through the fuselage in addition to 4 of the original 6 servo screws.
The bracketry & weights are currently in the paint shop.
Attachments
Ballast bar installation
Ballast bar installation

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Jilles Smits 1/3 scale SG38

Post by Peter Balcombe »

External ballast bars painted & fitted with just a couple of spots of paint on the fixings now required.
About ready for what is hopefully the final assembly & balance check before handing over to Cliff for addition of the minimal registration lettering and then the maiden flight ;)
Attachments
84D90EC4-B941-4AE8-8F14-43E529D1B514.jpeg

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VinceC
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Re: Jilles Smits 1/3 scale SG38

Post by VinceC »

Nice work Peter and a good solution to your CG problem

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Jilles Smits 1/3 scale SG38

Post by Peter Balcombe »

Just about done 8-)
Attachments
Ready for maiden flight
Ready for maiden flight

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B Sharp
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Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Jilles Smits 1/3 scale SG38

Post by B Sharp »

Although it's not my type of model Peter, I have enjoyed your build. Best of luck with the maiden and I look forward to the pictures.
Brian. :)

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