Sig Four Star 40 (modified)

Started by sanjayrai55, September 14, 2018, 09:50:17 AM

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sanjayrai55


samayaraj

Quote from: sanjayrai55 on September 17, 2018, 06:47:20 PM
Assembling the fuse in the Jig



Jig idea is awesom. Will use in another way for my composite models. Thanks for sharing

sanjayrai55

You are welcome

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Mehul Anand

When is it supposed to be in the air sir??

sanjayrai55


sanjayrai55


sanjayrai55


K K Iyer

Sir, is the tailplane stiff enough by itself?
Or have you inserted a skewer/ CF rod in the flute?

sanjayrai55

Pertinent point, Iyer sir

I have had flutter issues before too

What I do ( where feasible) is use 3 mm corro doubled, two sheets glued together with cyano

This renders it stiff enough, but finally will only know in the air. Worked OK on 40 size models till now

The 3 mm corro (actually 2.5 mm) flutes don't have enough room to insert a skewer or sizable CF Rod/tube. The maximum diameter admitted will be < 2 mm

samayaraj

Quote from: K K Iyer on September 26, 2018, 11:48:37 AM
Sir, is the tailplane stiff enough by itself?
Or have you inserted a skewer/ CF rod in the flute?


Dear KK Iyer ji,

I used 10mmx5mm thick wooden reaper instead of balsa wood running from nose to tail end in fuselage. It works good.

samayaraj

Quote from: sanjayrai55 on September 26, 2018, 05:56:47 AM




Dear Sanjayrai ji,

How do you fix the front wheel axle? In the first set of wooden supports or with the engine mount?

sanjayrai55

I'm not too sure what your question means, but will try anyway:

The engine mount/firewall will only be used for a nose wheel, with a tricycle landing gear

This is a taildragger. The main LG is bolted onto a 8 mm ply plate, which abuts the front former, and is glued to the former and the sides. Further reinforcement is given by two 10 mm pieces of balsa

sanjayrai55


sanjayrai55

Just a little cramped, but everything did fit OK


sanjayrai55


sanjayrai55


girishsarwal

Very fine! All the best for the maiden
gs

sanjayrai55


manu

even crashing requires a flight......

sanjayrai55

Quote from: manu on September 27, 2018, 06:24:13 PM
wow.. simply elegant,,
Thank you. Hope it flies well

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sanjayrai55

Had a very successful maiden

The model flew straight off the runway, with NO trims required!


sanjayrai55

 The 4 star turned out really fantastic. Needed no trims at all.

Flies absolutely true, smooth and stable. Highly responsive to the controls

Probably one of the best Flying models I've ever built


sanjayrai55

Did stretch it's legs a fair bit

Loops, rolls, inverted, spin, horizontal loops - the works  ;D

manojswizera

Sir ,
looks factory made. Absolute craftsmanship.
flies great too.
Russ-40 Trainer, Mr.moss, Pushler, Skysurfer, Mugi , F-22, Red swan, Xtra-300, redfury, flying mantaray.

sanjayrai55

Thanks Manoj. It was really a pleasure​ to fly

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