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Old Dec 19, 2008, 12:54 PM
AND FOR MY NEXT TRICK....!
jodini's Avatar
Omaha Millard, Nebraska, United States
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I like how that rudder servo is tucked away. Very nice Rich! Keep up the good work!
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Old Dec 19, 2008, 01:54 PM
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imsofaman's Avatar
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Wow Rich!!!! It is looking fantasic.....I agree with Joe in how the rudder is mounted. The pull-pull system is on the money. I am so impressed with the design. The weight is is very good too!!!

Cant wait to hear on the flight report.

Dave
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Old Dec 20, 2008, 04:49 AM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
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Ok ..I have made a motor mount this morning, installed all rc gear and batteries. So I have tried to find the CG and it seems I have a problem???..not sure what to do next as it is very low???.............HELP!!!!
There is no way the motor can come down to this level, do I need to start shuffle things about or is it just a crap design??
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Old Dec 20, 2008, 04:51 AM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
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Just had a thought...do the rotors need to be fitted??
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Old Dec 20, 2008, 04:52 AM
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Rich,

mount the rotor and repeat the procedure. Your c.g. will move up.

Jochen
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Old Dec 20, 2008, 04:54 AM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
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Thanks Jochen....I will go try again
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Old Dec 20, 2008, 05:05 AM
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I have my finger crossed
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Old Dec 20, 2008, 05:09 AM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
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Ok...with the blades fitted it has moved the CG up, A maybe able to bring the motor down but I will have to move the rudder closed loop system as the prop will foul them!..also this will bring the CG downwards again???....add weight to the top of the mast???

Regards Rich
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Old Dec 20, 2008, 05:58 AM
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Rich,

the vertical position of the c.g. may just work, but I think its safer to move the motor down some 15 mm. There are screws with loops insted of heads - I don't know their name -, why dont you screw two of them into the sides of the fuselage at the prop position and thread the control lines through the loops? That way they're safe. You may have to move the horizontal position of the c.g. forward a bit, some 5 to 10 mm, but I'm not too sure about that.

Jochen
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Old Dec 20, 2008, 06:52 AM
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Hi Rich, Jochen is on the right track. Good idea to use either tiny "eye bolts", or a simple music wire loop with (maybe) a piece of plastic tubing as a bushing. This way you can lower the motor/prop. CG shold be very close after that mod. Charlie A.
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Old Dec 20, 2008, 09:11 AM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
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Thats a good idea ..I will try this and see how far I can move the motor down, then re check the CG.

Thankyou Jochen
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Old Dec 20, 2008, 10:52 AM
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Maybe not the idea solution, but if you could extended the mast a bit, that would move the weight of the blades further up, the CofG will move up as well.

Maybe that's a change to try for the Mk II

It makes you realise the work that the designers amongst us have put into the proven designs where the CofG does come out in the right place. You've taken your first steps to joining them Rich. Keep at it, I'm sure the results will be worth it in the end.

I've got a spare set of rotorshape blades and a set of four spare 1.5" AeroBalsa blades sitting here doing nothing......

PeterO_UK
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Old Dec 20, 2008, 11:07 AM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
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Peter..spare blades sat around doing nothing!!!...I canhere your mind ticking!!

I have diverted the closed loop wires down out of the way and the distance from the prop tip to the boom is around 10mm. I am within 20mm of getting the motor Centre line to the CG and guess what ?..I have found out one of Gary Ten Pas's heads that I tested on my DAG and that is about 10mm taller and a touch heavier I will try this in position tomorrow and see how it changes things and see if the weight gain is significant......slowly getting there!!
Heres some photos..the blue dot is the CG

Regards Rich
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Old Dec 20, 2008, 11:26 AM
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Nice work Richie, looks like you are almost there....

Jochen.....thanks for sharing knowlege.....you are the man!!!


Dave
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Old Dec 20, 2008, 12:32 PM
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Quote:
Originally Posted by SafeLandings
Ok...with the blades fitted it has moved the CG up, A maybe able to bring the motor down but I will have to move the rudder closed loop system as the prop will foul them!..also this will bring the CG downwards again???....add weight to the top of the mast???

Regards Rich
Rich,
There are small lightweight pushrod guides available at this link, not sure if that would solve your rudder control linkage clrearance problem or not. I may have misunderstood the problem, but a package of 4 is $1.50.

Micro pushrod guides. Could also be used as guides for closed loop.
Regards,
-Mike
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