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Oct 29, 2015, 10:02 AM
MigLovin'
I love the lines on the bottom. Beautiful craft.
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Nov 05, 2015, 04:07 PM
Isaiah 40:31
Clickety's Avatar
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Few 'staged' pics from the field...

I forgot the hex wrench for putting on the prop - so I didn't get proper aerial footage....next time!
Jan 23, 2016, 03:33 PM
Isaiah 40:31
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The weather was not horrid today, so I managed to get some footage of the hawk - although the lighting was pretty rubbish.

Red arrows Hawk (4 min 41 sec)
Last edited by Clickety; Jan 23, 2016 at 06:38 PM.
Mar 09, 2016, 09:30 AM
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slowmatch's Avatar
Very cool model! I have a 2212/6 looking for an airframe and I'm very tempted!

I'm new to park jets though so a few questions if I may:

1. Could you tell me the finished weight please?

2. I couldn't work out from the plans but is it an all moving tail?

3. Could you explain the ducting? Is it for cooling the esc? Or do you get better performance from the prop?

4. Are all the parts all 6mm depron?


Thanks
Jon
Mar 09, 2016, 09:56 AM
Isaiah 40:31
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Hi Jon,

Thanks for your positive comments.

I'll weigh it for you when I get home - bear in mind mine has fibreglass reinforced belly which will add some extra weight.

Yes the tail is all moving. it uses 6mm carbon tube through aluminium tubing.

The ducting is to make it look more realistic, cooling the esc and better performance from the prop.

Yes all depron is 6mm.

I'm happy to help you in anyway I can.

I love Parkjets! welcome to the hobby! they are cheap to build and repair, and loads of fun.
Mar 09, 2016, 03:38 PM
Registered User
slowmatch's Avatar
Thanks for the answers. I'm seriously thinking about having a go but will need to splash out on some 2200mah batteries (any recommendations?)

A few more q's for you, if I may:

What size servos are they?

Can you explain or point me to a thread that explains the tube motor mount please? I've only ever done cross mounts on a ply firewall.

Any details for the tailplane control horn please? How is it attached to the carbon? I had been doodling drawings for an anhedral tail before I saw this build so I might see if I can make it work...

Thanks for your patience with all the queries!


Jon
Mar 09, 2016, 04:01 PM
Isaiah 40:31
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I make the tail thus :-

3mm lite ply pieces 25 x 25mm. They are drilled to accept an ally tube. Then the tube is epoxied to the ply to the depron.

Then I slide the 6mm carbon tube into the ally tube. I use a standard size servo horn drilled out to 6mm - this becomes the horn and also prevents the carbon tube sliding our one direction.

I use a prop size adaptor drilled to 6mm, slid over the carbon tube to prevent it the carbon tube travelling the other direction. I then glue the horn to the rod with a few drops of expoxy.

I then coat the carbon tube with epoxy and push into the slot on the elevator pieces. I put masking tape top and bottom to keep the glue from dribbling out and to keep the wing surface flat - same technique as per the wing.
Mar 09, 2016, 04:07 PM
Isaiah 40:31
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To fix the motor to the plastic motor mount, I use 5mm long 3mm screws to fit the motor. I also remove a bit of the plastic on the plastic mount with a knife as it binds a little to the end of the motor shaft.

I fit the plastic motor mount to the depron using hot melt glue.
Mar 09, 2016, 05:39 PM
Isaiah 40:31
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It's quite a heavy build with a lot of paint and epoxy repairs, fibreglass belly covering and nose led lights, still it flies nicely

Without battery
Mar 09, 2016, 06:00 PM
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slowmatch's Avatar
Excellent, thanks for all the details!
Apr 03, 2016, 04:16 AM
Isaiah 40:31
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Some more flying footage filmed from my friends SU37 (Steve Shumate design)

Hawk Chasecam (2 min 6 sec)
Apr 03, 2016, 06:03 AM
Registered User
slowmatch's Avatar
Thats awesome! Nice flying

My batteries have arrived. I'm wondering whether to try modifying it for a 55mm fan I have

I also need to get some filler sorted - do you have any specific recommendations?
Apr 03, 2016, 08:31 AM
Isaiah 40:31
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Thread OP
Hi Jon,

Thanks buddy.

Glad to hear its progressing for you. The biggest problem I see with an edf, is that the elevator spar goes straight through the duct. You would need to make a fixed horizontal stabiliser with elevator flaps and separate servos. Also, you may need to increase the fuselage a little to get the thrust tube to fit ok.

I would love to see your build pics whatever way you choose.

I used Lightweight filler. You can get it from most diy stores. The tubs feel like they are empty. In the US, its called spackling.

I've tried several brands, and they are all ok. This is the current stuff I'm using :- https://www.google.co.uk/url?sa=i&rc...063974&cad=rja

Cheers

Craig
Apr 03, 2016, 12:50 PM
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slowmatch's Avatar
Thanks Craig, got some ordered.

I will probably go for your pusher version, we'll see
Apr 03, 2016, 10:37 PM
Isaiah 40:31
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I look forward to see how you get on
Jun 04, 2016, 06:38 AM
Isaiah 40:31
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I have completed my construction guide! I posted it on my blog earlier today !

https://www.rcgroups.com/forums/show...0#post33638652
Jun 07, 2016, 07:20 AM
Registered User
Hello i download plans from first post. Im looking at it and i see that there is space fore EDF 70mm. Am i right?
Jun 07, 2016, 07:39 AM
Isaiah 40:31
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Yeah it will fit...

But, you will need to have a tight thrust tube - or enlarge the tail a little. The image attached shows the projection of the inner surface of a 70mm EDF. It is a fast plane, so a tapering thrust tube would work, and make it really fast too!

You would need to control the elevator with fixed horizontal stabiliser with trailing control surfaces rather than a full flying elevator. along with two servos.

If you build it, please let me know how it goes!!

Cheers

Craig
Jun 07, 2016, 07:41 AM
Isaiah 40:31
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You will probably need cheater holes too
Jun 08, 2016, 11:57 AM
Registered User
Hi.
Today i cut parts. On first look i think model should be bigger. Next one i make in scale 120% or more... i dont know hom much more, but 120% for shure. I go on EDF 70mm with 4s its give me 1,75 KG at start, after voltage go to 14V its give me somethink like 15,5-1,6. I think that plane + edf its overpowered.
Jun 09, 2016, 01:00 AM
Isaiah 40:31
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Thread OP
Hi Kuter, I think for a high power Edf setup like you are talking about I would agree to reduce wing loading and give yourself more space for your thrust tube. 1.2-1.4x sounds about right!
Jun 09, 2016, 04:04 PM
Registered User
Im stop making with oryginal plans. My EDF dont fit.... I resize plans to 125% and make some corections. Now looks like it should i make photo after i finish
Jun 10, 2016, 04:51 AM
Isaiah 40:31
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Thread OP
Hi Kuter,

The EDF unit should fit within the standard sized model according to my 3D CAD model, but I think you are making the right choice anyway, as the higher wing loading would mean that you would have to land fast and depron is quite fragile especially with the low wings.

Please post your build pics, so that others can benefit from your work?

Thanks Buddy

Jun 10, 2016, 03:07 PM
Registered User
Hello :-) for now it's look like that. Wing size is 100 CM before was 80 CM. Can You suggest me where to put edf? Tail serwo will be, to big, but a have only 12kg /CM :-):-):-) Name: uploadfromtaptalk1465589246288.jpg
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Wysłane z mojego GT-I9505 przy użyciu Tapatalka
Jun 11, 2016, 02:34 AM
Isaiah 40:31
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I guess if you mount the Edf trailing edge 150mm from the tail, it would be about right
Jun 11, 2016, 04:59 AM
Isaiah 40:31
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Thread OP
You will probably need to put two smaller servos each side, and lose the pusher motor depron panels
Jun 11, 2016, 06:23 AM
Registered User
Im at work right now but i think i do it like this
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Jun 11, 2016, 07:16 AM
Isaiah 40:31
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Thread OP
Yeah that sounds like it will work. Although you will have your carbon elevator tube running through your thrust tube which will reduce efficiency.
Jun 11, 2016, 07:04 PM
Registered User
Name: uploadfromtaptalk1465689822925.jpg
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Wysłane z mojego SM-G935F przy użyciu Tapatalka


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