Griffon 8100 TD Hovercraft - Scratchbuilt

Started by VC, March 12, 2011, 09:15:21 PM

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VC

Finally, completed the stablemate for the earlier Griffon 2000.

As I type this, we are making final adjustments to the skirt and fabricating the rudder servo arm.

We have been working on this project flat out 15 hours a day for the last week. Mustafa Sir has been going home at 2am/3am every day. I've taken a sabbatical from my profession. We are dead beat tired. Hope it is worth it. We will maiden her tomorrow.

I do have some horror stories to share about this build..... :banghead: :banghead: :banghead:

Will be posting all details and videos soon.

Growing old is mandatory, growing up is optional!

VC

Some more................
Growing old is mandatory, growing up is optional!

rohitgupta322

It is just absolutely stunning. The result truly reflects the effort that your team has put into building it. Waiting for the videos.
Be Inquisitive

Akshayb


anwar

Hangar : Please see my introduction.
RC India forum and me : About this forum.

spitfire

It is looking really nice. Waiting for video..!   :thumbsup:

rcpilotacro

Eager to know, how you solved the motor issue, ..
Gusty's Hangar and Introduction.

A Good pilot will practice until he gets it right,
A Great pilot will practice until he can't get it wrong.

sundaram

 {:)} {:)}  {:)}  :thumbsup: it is absolutely realistic. The camoflage scheme of painting is also very real. The details are perfect. The  motor mounts are live real. Eagerly waiting for video.

Is it having differential thrust of the two motor for steering?.



vksingh

No words comming out  {:)}
amazing Sir :salute: :salute: :salute: :bow: :bow: :bow: the great way to express
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VC

Thanks everybody! Especially to VK Singh and Anam without whose invaluable help this project wouldn't have been successful.

WingCo, major lesson learnt about the motor. There was nothing wrong with it. The mount is made out of aluminium and the motor mount screws were one mm too long. They went through the mounting holes and touched the coils inside, causing the motor to malfunction. Will post detailed pictures to explain. Thanks for standing by.

Sandy, at the moment we are not using differential steering, but we plan to modify that today.

Regards,

VC
Growing old is mandatory, growing up is optional!

ankitbaid

absolutely wonderful.....awesome.......w8ing for the vids bhaiya

VC

12:55 am, 14th. March 2011. just finished the finer details. Couldn't maiden her today due to family exigencies. The lifter motor is now a combination of 2 props 6X4 mounted on the same shaft (Thus it is a 6 blade prop 6X 4).

Taken some snaps and hope to share them soon.

Land trials show that the motor and ESC remain comfortably warm after a 5 min run at full throttle. Maiden later this day at about 9am.

Please wish us luck.

VC
Growing old is mandatory, growing up is optional!

foamybuilder

What is that paint. The paint work is natural and stunning  {:)}

VC

Lifter motor needs to be upgraded. Not generating enough cushion on water for the model to go over the hump speed. However, everything else worked fine. Judge for yourself.......



The Horror Story continues.
Growing old is mandatory, growing up is optional!

rohitgupta322

Wow, this looks so real in water. VC bhaiya how can you call this a horror story? You have come so far from your first prototype and are very close on achieving the goal.
Be Inquisitive

VC

#15
Dear Rohit, Faoamybuilder,

Thanks a ton. The paint is just normal enamel paint (Black and White) mixed in varying proportions to arrive at Battleship Grey, Smoke Grey and Dark Grey shades. It was tricky but I am happy with the results.

Here are some more shots. Rohit, you are right, she does look rather realistic..... :giggle:

Regards,

VC
Growing old is mandatory, growing up is optional!

VC

#16
It is always difficult to bid Goodbye to a model that you have painstakingly built over the days. As she is being packed into a crate for transportation to a far off destination, and you catch the last fleeting glimpse of her, you can't help feeling nostalgic. All the frustration, the challenges, the long hours, the agony and and the ecstasy of the build flashes through your mind as the last nail is driven into the crate.

The Griffon 8100TD went today. Carrying with it a myriad of emotions. For a brief moment, we enjoyed the company of our earlier build (the Griffon 2000). Here are a few pictures of the epic rendezvous. While the 2000 at 3.5 Kgs and driven by a 6X4 prop is impetuous like a teenager, the 8100TD ( 7.2 Kgs), driven by 2 X 5/3 props, is the more sedate adult. It is like comparing a Lamborghini with a Mercedes!

I am uploading a video on youtube and will post the link here soon. In the meanwhile, enjoy the pictures. The Client has modified the Griffon 2000 with some additional sticker work, for obvious security reasons, I have blurred certain details of this craft.

I would welcome your comments.

VC
Growing old is mandatory, growing up is optional!

VC

Some more pictures..........
Growing old is mandatory, growing up is optional!

sundaram

Congratulations VC. Both were crafted beautifully. Absolute beauties. it must been really difficult to let go of them. best wishes for many more such builds :thumbsup:

rohitgupta322

"Wow", this is all I can say at this time. Thats the best piece of craftsmanship I have seen for a long time. Congrats VC bhaiya.
Be Inquisitive

rcpilotacro

#20
VC
I thought you have gone underground, now i know why, super stuff, you gave me too sleepless night, i even dreamt of burning ESCs and motors. I know it is difficult to say Godspeed to your baby, well that's life. did i say ? gr8 build
Gusty's Hangar and Introduction.

A Good pilot will practice until he gets it right,
A Great pilot will practice until he can't get it wrong.

SunLikeStar

Good job on the crafts VC, that sure looks like lot of work. I hope you are getting some good out of giving these beauties away :thumbsup:

VC

The Brushless lifter motor was replaced with a Brushed Type 500 motor (Supplied by Lunar Motors, Valsad, Gujarat). Anam / VK Singh supplied the Brushed ESC's rated @ 30 amps. Motor running cool after 5 minutes of full throttle burst with 3cell LiPo @ 2200mAh. Had to break in the motor under water and Mustafa Sir had to re solder the armature to improve performance and decrease sparking. Nonetheless, GREAT motor!

Gusty, thanks for suggesting a brushed motor!
Growing old is mandatory, growing up is optional!

VC

The rear hatch / Lifter motor intake has been modified to accommodate a larger intake of air. Ducts and louvers have been cut out..........
Growing old is mandatory, growing up is optional!

VC

Growing old is mandatory, growing up is optional!