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SHORT BROS NIMBUS SCALE 1:3.5

Let us all watch your new project progress.
Jilles
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Joined: 22 Mar 2015, 10:27
Location: Australia
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Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by Jilles »

Today all parts were assembled for the first time. all things went together without a problem. Not one of my smaller projects
parts were weighted and required balance weight calculated. Estimated flying weight to be under 12 kg (25 lbs)
wing loading is then 68 gr/dm2 (23 oz/ft2). for this model seize a good outcome. Final figures will be known when all painting is completed and electronic equipment installed.
Now a sanding and finishing job is ahead of me. The fabric used will be Ikarex. A polyester fabric that does not need dope to close, will shrink as standard film but need the application of heat sensitive glue like Sig Stix-it or balsa block. Ikarex is also very suitable for painting
Attachments
F102.jpg
F103.jpg
F104.jpg
F105.jpg
F106.jpg

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VinceC
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Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by VinceC »

Genius. That is one nice glider

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

Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by Peter Balcombe »

Very nice Jilles :)

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chris williams
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Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by chris williams »

Good job, Jilles...have you calculated how much Pb you will need in the nose? !2Kg seems tad optimistic?

Jilles
Posts: 218
Joined: 22 Mar 2015, 10:27
Location: Australia
Contact:

Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by Jilles »

the model was weighted when is was all together. With all equipment includes except for 2 receivers it was 9.2 kg. required balance was close to 2 kg, but not cover and paint included in all this. The plan is to finish and paint tail bits and wings, prime the fuse, than workout the balance weight minus 10%. I made a plaster mould to cast the lead to fit in the 3D printed nose cone. I add only 90% of the required balance in the nose before it is fitted for good. The other 10% will be in a ballast chamber just behind F1 so I can adjust either way as deemed necessary.
I wish I could give the model to Crish W. because he is very good in finishing and I am just average in that department.
Because the wings are in one piece there needs to be a special box fabricated for the wing transport because the tray on my Toyota Ute is only 2.4 m long.

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chris williams
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Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by chris williams »

Looking forward to the final result, Jilles...

Jilles
Posts: 218
Joined: 22 Mar 2015, 10:27
Location: Australia
Contact:

Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by Jilles »

Fitted the sliding window in the canopy. I had a scale 1:3 version in stock from TopModel Cz. The screws as specified as M1.2 but are actually M1
I did drill a test hole of 1 mm and found out they just fell through the hole. So a mini drill set was purchased and it worked out that a 0.8 mm drill did the trick
On the sliding window were two studs .These only allowed the sliding part to go into the rail by 1 mm only . I removed the studs so the sliding window can make full use of the groove depth in the rails. Hole were carefully drilled and rails fitted. All works well. There is however no lock in closed position so I presume if could be blown open by the airflow.
The finishing job of the model will now start in earnest.
Attachments
F107.jpg
F108.jpg
F109.jpg

Jilles
Posts: 218
Joined: 22 Mar 2015, 10:27
Location: Australia
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Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by Jilles »

Because I can only carry 2.4 m long wings in my Ute, a box had to be made to carry the 2.7m long gull wings. the Horz,stab/elevator will be housed inside as well. Some pictures attached.
The box is located on top of the existing canopy. Wings can be unloaded through the side . The canopy roof can still be lifted to access the models inside.
The Nimbus fuselage will fit inside the canopy. At the moment my 1:3.25 KA6E, 1:3 Fokker Baby and an electric glider are inside
Now returning to the Nimbus model for covering and painting
Attachments
CAB1.jpg
CAB2.jpg
CAB3.jpg
CAB4.jpg
CAB5.jpg

Jilles
Posts: 218
Joined: 22 Mar 2015, 10:27
Location: Australia
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Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by Jilles »

More progress with the less popular painting job. The R.H. wing is completed and all three servo's installed. L.H. wing needs the red paint pathes added. Stab elevator completed, each elevator halve operated with a separate servo. Rudder and canopy painted as required.
I do follow the color layout as evident on the prototype pictures of around 1971. The exception are the ailerons, they are totally red instead of the tip only. This is for me has a practical reason, we go up to 2000ft and even a large model becomes then hard to see. Even more so on a blue sky background. A receiver servo tray was made. I use a Taranis system and need 10 channels so two receivers are required. it also gives me the opportunity for some redundancy. Each RX will operate one elevator halve and one side of ailerons. The picture shows the 2 RX units and a Vario on the main RX.
Looking for a dual power supply. two 3S Lipo's will supply power but need to find a way to have two reliable voltage regulatorsto 6V that can be connected parallel in the end to the RX units without breaking the bank.
Attachments
one wing completed
one wing completed
somebody is interested
somebody is interested
stab/elevator top
stab/elevator top
stab/elevator bottom
stab/elevator bottom
finished rudder
finished rudder
finished canopy
finished canopy
receiver tray
receiver tray

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VinceC
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Re: SHORT BROS NIMBUS SCALE 1:3.5

Post by VinceC »

Nearly there, the assembly is going to be exciting and looking forward to it

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