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ProModeler Scorpion Power
HelicopterScale Model RC Helicopters Docs  450 Scale Lynx AH-7 My first Scale build
04-03-2017 07:21 AM  4 months agoPost 121
seaharrierman

Senior Heliman

Gosport UK

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Thanks Rich

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04-03-2017 05:19 PM  4 months agoPost 122
seaharrierman

Senior Heliman

Gosport UK

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Got the decals on today. They are homemade printed on inkjet decal paper and sealed

I carefully cat them out

IMG_0640 by Glen Davis, on Flickr

I used humbrol decalfix to soak and the apply the decals

IMG_0641 by Glen Davis, on Flickr

IMG_0642 by Glen Davis, on Flickr

IMG_0643 by Glen Davis, on Flickr

IMG_0644 by Glen Davis, on Flickr

IMG_0645 by Glen Davis, on Flickr

IMG_0646 by Glen Davis, on Flickr

The nose art was a real pain in arse to apply and I need to a few bits of touch up

Going to have a go at some light weathering around the panels just enough to make the pop

Glen

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04-06-2017 07:57 PM  4 months agoPost 123
seaharrierman

Senior Heliman

Gosport UK

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well guys I've had a go at weathering. I used humbrol wash at first I did the panel lines but this was just too much for my taste so removed the panel line and just did around the raised panels to the a bit of help and as I took excess off used its to lightly leave a slight dirtiness, I have also given the nose art a touch up mainly free hand painting over edge with black to lose the white edge caused by the paper

I'm not sure I like yet but its growing on me

IMG_0649 by Glen Davis, on Flickr

IMG_0650 by Glen Davis, on Flickr

Love to hear your opinions guys before I seal it with matt cote

Glen

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04-08-2017 10:39 PM  4 months agoPost 124
206 pilot

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,Long Island,new york

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Hi glen I think it looks great!! Looking forward to seeing blades on it..Rich

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04-09-2017 01:49 PM  4 months agoPost 125
Thumper217

Senior Heliman

Slidell, LA - USA

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Very nice job and I like how you masked for the soft edge lines. this has been a great build thread with a lot of tips and tricks. Can't wait to see some video of it in the air.

Andrew

Thumper

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04-10-2017 05:05 PM  4 months agoPost 126
seaharrierman

Senior Heliman

Gosport UK

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Thanks Rich that day is getting closer

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04-10-2017 05:07 PM  4 months agoPost 127
seaharrierman

Senior Heliman

Gosport UK

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Thanks Andrew. Its always good to pass on knowledge. that video will be coming sometime in few weeks as weather is improving here by the week

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04-10-2017 05:08 PM  4 months agoPost 128
seaharrierman

Senior Heliman

Gosport UK

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Hi Guys

I think I have finished all the painting and varnishing. The IR suppressors and Intake sand filter metalwork have been painted with Humbrol Polished Steel Metal Cote. once dried was buffed gently with a cloth to a nice shine that really simulates metal.

Everything lined up ready for final assembly just waiting for new bolts for the tail attachments

IMG_0213 by Glen Davis, on Flickr

Once assembled I need to work on a new battery tray that moves the battery into the nose for better balance

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04-12-2017 07:37 PM  4 months agoPost 129
seaharrierman

Senior Heliman

Gosport UK

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I realised I had forgot a part so a few hours on 123D design I drew up the anti vibration hub and friend from my club was kind enough to print it. This is my first Foray into 3d Printing Might be his printer an old one but the finish is not great. I'm going to mount in a lathe and carefully sand to a flat finish. Is this the norm with home printers

IMG_0662 by Glen Davis, on Flickr

IMG_0661 by Glen Davis, on Flickr

I have also fitted the mechanics and glued on the remaining parts

IMG_0663 by Glen Davis, on Flickr

IMG_0664 by Glen Davis, on Flickr

IMG_0665 by Glen Davis, on Flickr

IMG_0666 by Glen Davis, on Flickr

IMG_0667 by Glen Davis, on Flickr

still some work to do before she will be ready to fly

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04-13-2017 06:45 PM  4 months agoPost 130
seaharrierman

Senior Heliman

Gosport UK

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Hi guys

I really want to use a 4 blade tail rotor and I have a 450 scale head from http://www.cnchelicopter.com however its massive compared to original head and will look ridiculous any ideas on how to reduce its diameter so that it looks the right size and still works effectively

IMG_0671 by Glen Davis, on Flickr

IMG_0672 by Glen Davis, on Flickr

IMG_0719 by Glen Davis, on Flickr

as you see from the pics the new assembly is about 30mm bigger.

Hope you guys have some ideas

Glen

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04-15-2017 01:21 PM  4 months agoPost 131
seaharrierman

Senior Heliman

Gosport UK

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Ok guys

I have been trying out a few ideas.

It looks like the 450 blade grip will fit with a few minor modification.

IMG_0724 by Glen Davis, on Flickr

As you can see from the above pic the control linkage is now on the outboard and for the next blade grip to fitted and rotate freely the inboard lug need filing flush.

IMG_0723 by Glen Davis, on Flickr

IMG_0725 by Glen Davis, on Flickr

These two pictures show the range of pitch which looks to go from neutral to plus 45 degrees. I think to solve this so that pitch range is equal either side of neutral is to

1/ Use ball links on a very short rod
2/ Print new shorter dog bones
3/ A combination of the above

first thing I think I need to do is find out what the total pitch range should be.

As always guys ideas and suggestion greatly appreciated

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04-19-2017 08:12 PM  4 months agoPost 132
seaharrierman

Senior Heliman

Gosport UK

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Well Guys

Today I went on a road trip to Ickenham to see my friend and mentor Dave Fisher of Flyin Fish RC Helicopter flight school for a lesson to help brush of cobwebs from the lack of flying over the winter. Dave has be an inspiration to me this year with his help and encouragement to get my flying to where it needs to be so I can fly my models safely and well. As the weather was perfect for flight tests I took her along.

We fitted the blades and did prefight checks and Dave kindly agree to test fly her to check trims and balance etc. This to take pics and video.

IMG_0730 by Glen Davis, on Flickr

[video]

Watch at YouTube

[/video]

Some stills from second flight after adjustments

IMG_0737 by Glen Davis, on Flickr

IMG_0739 by Glen Davis, on Flickr

IMG_0740 by Glen Davis, on Flickr

IMG_0741 by Glen Davis, on Flickr

IMG_0742 by Glen Davis, on Flickr

IMG_0743 by Glen Davis, on Flickr

IMG_0744 by Glen Davis, on Flickr

IMG_0745 by Glen Davis, on Flickr

IMG_0746 by Glen Davis, on Flickr

IMG_0747 by Glen Davis, on Flickr

IMG_0748 by Glen Davis, on Flickr

IMG_0749 by Glen Davis, on Flickr

IMG_0750 by Glen Davis, on Flickr

IMG_0751 by Glen Davis, on Flickr

IMG_0752 by Glen Davis, on Flickr

IMG_0753 by Glen Davis, on Flickr

IMG_0754 by Glen Davis, on Flickr

IMG_0755 by Glen Davis, on Flickr

IMG_0756 by Glen Davis, on Flickr

IMG_0757 by Glen Davis, on Flickr

IMG_0758 by Glen Davis, on Flickr

She flies absolutely beautifully I am very pleased with her so far. Still got the 4 blade tail rotor to work on and TOW missiles to make before she is fully finished

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04-20-2017 04:45 PM  4 months agoPost 133
206 pilot

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,Long Island,new york

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Nice job glen, looks great in the air!!! Rich

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04-22-2017 07:36 PM  3 months agoPost 134
seaharrierman

Senior Heliman

Gosport UK

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Thanks Rich

She flies like a dream not finish with her quite yet still some tinkering to do

Glen

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05-05-2017 07:25 PM  3 months agoPost 135
seaharrierman

Senior Heliman

Gosport UK

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Been a couple of weeks since I last posted after her maiden flight while outwardly she looks finished there is some work still to do.

I am still work on the 4 blade tail rotor and with the help of friend and his 3d printer I now have much better 4 blade tail rotor. Ok it does look pretty at mo and need refining.

IMG_0781 by Glen Davis, on Flickr

What I have done is replace the blade grips with align blade grips but using bushes and brass spacers to give clearance for pitch rods it its a little stiff at mo and still needs tweaking then rigorous test before fitting to the lynx. the pitch change rods are replaced by shorter slightly thinner 3d printed ones

IMG_0782 by Glen Davis, on Flickr

IMG_0790 by Glen Davis, on Flickr

always good to hear your thoughts and suggestions guys

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05-08-2017 01:19 AM  3 months agoPost 136
206 pilot

Veteran

,Long Island,new york

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Hey Glen I never used a 4 bladed tail it looks good as long as u did your home work, give it a shot but be careful... Rich

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05-13-2017 08:49 PM  3 months agoPost 137
seaharrierman

Senior Heliman

Gosport UK

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Hi Rich

Yes looks great the good news is I have done lots of homework on this it will get throughly test before it gets anywhere near the model

Glen

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05-14-2017 04:00 PM  3 months agoPost 138
seaharrierman

Senior Heliman

Gosport UK

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Hi Guys

Been a bit busy with moving my Kio carp and starting to build there new home but I did manage to do some work.

I Tidied up the 4 blade tail rotor and fitted it to a sacrificial 450 helicopter for initial flight test

IMG_0806 by Glen Davis, on Flickr

IMG_0807 by Glen Davis, on Flickr

IMG_0809 by Glen Davis, on Flickr

Test flight took place on Thursday evening

Watch at YouTube

The first flight when well to start will but at the end the grub screw on the tail hub came loose and the hub and shaft parted company luckily no damage was sustained so the grub screw was retighten and we went for a second flight.

Watch at YouTube

The second flight went off without a hitch she flew very well indeed performing manoeuvres which in a scale model will not be asked to do.

I would like to thank the guys at HMS Sultan model club for their support and help with this project especially Nick for the loan of his helicopter.

No my design and concept has been proven to work the next stage is but a 450 fit with 4 blade main head and 4 blade tail and test fully looking for reliability and wear on parts

Glen

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06-11-2017 10:07 PM  68 days agoPost 139
206 pilot

Veteran

,Long Island,new york

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Hey glen

How's the Heli flying?? Rich

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06-23-2017 02:51 PM  56 days agoPost 140
seaharrierman

Senior Heliman

Gosport UK

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Haven't flown her much as been concentrating on practicing for my BMFA A certificate which I passed on Wednesday. I will now be flying the her regularly to learn her quirks. But she is going onto display at a local model engineering clubs annual model show so have to be very very careful as I want her in top condition. She will,also be at helipad this year too. Helipad is a local scale model fly in

Glen

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ProModeler Scorpion Power
HelicopterScale Model RC Helicopters Docs  450 Scale Lynx AH-7 My first Scale build
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