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Tomahawk/Paritech Viperjet MkII 3,48m

Old 12-24-2011, 01:05 PM
  #1  
Niklas H
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Default Tomahawk/Paritech Viperjet MkII 3,48m

We've picked up the first 3 kits of the new 3,48m XXL Viperjet from Paritech on the 10th december. Started building on mine already but didn't get too much done now, because of some other projects.
The kit is very nice, excellent quality as usual from Tomhawk and Paritech, still some parts missing like flaps, landing gear, cockpit and lights but that should arive maybe next week or early januar.

I've put the parts togehter at home in the living room before i took it back to the shop to start building, damn this thing seems even bigger than it was at JetPower

I'm gone build it pretty scale, at least that what i'm planing to do, we'll see how it goes. So mine will be with the scale wing tips with lights. But for the ones here that like the winglets i've made some pictures with the winglets on, when i remember right they hadn't them finished at the JetPower.

And now the important part... the pictures

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Old 12-24-2011, 01:08 PM
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Niklas H
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

And some more pictures of the kit and parts.
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Old 12-24-2011, 01:24 PM
  #3  
jetpilot
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Very nice!
Scott
Old 12-24-2011, 01:57 PM
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Jack Diaz
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Niklas,
Nice plane and nice Le Corvoisier chair
Merry Christmas

Jack
Old 12-24-2011, 10:49 PM
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Robrow
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Very nice construction, what is that greenish looking stuff used for the internal formers, looks like a sort of foam?

Rob.
Old 12-25-2011, 12:05 AM
  #6  
Chris Leese-Wood
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m


ORIGINAL: Robrow

Very nice construction, what is that greenish looking stuff used for the internal formers, looks like a sort of foam?

Rob.
Rob

It is Airex Foam, which is used as a sandwich material and for formers.

Chris
Old 12-25-2011, 08:29 AM
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Niklas H
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Thanks!

First i've drawed and milled some rings because the wing tube casing was a little bit short. Also it looks better when it's all glued in. I've also waxed the wing tube at the areas where it's exposed to the epoxy.
Then marked the position with tape where the former will be. Sanded the area and then glued the former in with Epoxy L-285 mixed with thixotropic agent and micro baloons.
During the glueing and the time it was drying i've put the wings and wing tube on the fuselage to make sure everything fits correctly.

regards niklas
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Old 12-26-2011, 02:45 PM
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Niklas H
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Let's go on with the formers.

First step was fo fixate the fueltank holding former to get the right position for the turbine formers.
Then i've marked the positions and taped around the glueing areas and then, i've sand all the areas.

After that i've glued in the formers with epoxy and fixated them on few points with some CA glue.

regards niklas
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Old 12-31-2011, 12:00 PM
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Niklas H
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Started with the fuel tank, really nice design, it fits to the former that holds the wing tube caseing in the back. And in the front it's screwed to to a very compact assembly that is glued to the bottom of the fuse.
The original design had just the horizontal former in the front, i've shortened this former about 10mm and made two vertical formers to support the mount better. Also glued in the alu part of the fuel nipple.

Best regards Niklas
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Old 01-12-2012, 12:13 PM
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

all i can say it look really impressive and i,m really curious how she will perform.do you have any update's on this great project

geoffrey
Old 09-20-2012, 05:31 AM
  #11  
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Any more news on this awesome jet?
Old 10-02-2012, 10:27 PM
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Is this how the kit comes?  Looks like a builders kit?  I wonder if they supply in factory build stages?
Old 10-04-2012, 09:34 AM
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Ragz,

Kit should not be much different from the SG viper you built. The built up wing in the pics is not the viper wing.

Chatty.
Old 10-04-2012, 11:33 AM
  #14  
schroedm
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

There is still a fair bit of 'building' to do in today's ARF world.

No hinge posts, hinge rods, wing tubes, stab tubes, wing/stab bolts, canopy, formers, gear doors etc done for you.

Speedbrakes are a pain in the ***** mind you but the rest is pretty easy. Just need to think 3 times, measure twice, cut/drill once!!

Old 10-04-2012, 09:23 PM
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Default RE: Tomahawk/Paritech Viperjet MkII 3,48m

Mark, you know what I am thinking...  hehe...
Old 01-01-2017, 11:15 AM
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Leardriver
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Hello...kinda resurrecting this thread cause I just received my new Paritech Viper MKII XXL Kit! Naturally there are no direction...not that much isn't intuitive! But...there are a few things that I honestly have NO IDEA what to do with...the few pics on the Paritech site are small and blurred and there is literally zero direction! So ANY input would be appreciated! This is a stunning airplane and looks to fly amazing! I have a 4 months window to assemble and paint (hoping for Joe All). I am assembling the equipment required now and should have everything here within a week or so. And yes...the airbrakes look to be a PIA...wondering if guys actually use a "micro/mini servo" that Paritech has apparently spec'd?

A little more info...I did purchase the kit off th classifieds here on RCU as there was doubt as to the time frame to get a kit direct from the manufacture...5 months min I was told...and some work has been started. I do know I am gonna do this a little differently than the original owner but overall very little work has been done. Kinda wish it wasn't but its alright.

Anyway......ANY input guys have with this beastie is appreciated!

Thanks!
Old 01-01-2017, 06:47 PM
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ww2birds
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Hi Leardriver, I am most of the way thru the build on mine. I can help a bit if you like .. PM me. It's a beautifully made kit ... plenty of work to do in the build.

First step is to go to the Paritech site, there actually are some good pics that help id parts and show how to do things:

http://www.paritech.de/content/galer...ell=viperjet35

and

http://www.paritech.de/pdf/bauanleit...viperjet35.pdf

In addition there is a pretty good build thread on a German RC site, some of the posts on this thread may have come from there:

http://www.rc-network.de/forum/showt...I-3-48m/page10

It's not too hard to wade thru it using google translate or a browser that can do language translation.

The speedbrakes do take a bit of work, the key is to get them in before installing the engine formers... otherwise it would be very hard to reach where they have to go. I can send you some pics, or perhaps I should post them here.. I did not feel comfortable with a micro servo on the speedbrakes and used a standard size instead .. just opened up the mounting plate holes a bit.

Dave McQueeney

Last edited by ww2birds; 01-01-2017 at 07:00 PM.
Old 01-02-2017, 01:13 AM
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Andrew Bird
 
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Paul - I know of a decent number of these flying and none of them have the speed brakes fitted. They are pretty small so would be surprised if they have much affect.
Old 01-02-2017, 07:32 AM
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Leardriver
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Hi Dave...yes I have seen those links/pics. Most things seem pretty straight forward, but the way they do the airbrakes to me is...well...just seem like there ought to be a better way I suppose. But thinking of cutting hatches out where the AB recesses are. Just leave a 1/4" or so to screw a thin Poly-ply cover. Than I would at least have access to the servo once that rear former is glued in. Anybody used air for the AB I wonder? Prob be an easier installation and removal but might be more of an issue in operation?


Andrew...I agree about the AB but I got them with the kit so I figured I would make the effort to install them! Might regret it but gotta give it the college try! Lol! Anymore pics you can conjure would be great!

I am all ears on this one guys! Any recommendations would be well received. One thing I do have buzzing in my ear is doing an electric conversion on gear and brakes.....any thoughts?

PaulP
Old 01-02-2017, 12:54 PM
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Agree that the small airbrakes won't have too much effect .. their main impact is the bling factor :-)

If you are going to have an air system in the plane, then cylinders for the ABs would be viable .. but of course if you do electric brakes then no. I think the servo mechanics worked out just fine with two ball links.

Regrding install and future service,I think a hatch is not a bad idea at all. The method in the pics works just fine (see my pics below). I did cut out some of the "floor" of the flap recess area. This let me assemble the entire hinge mechanism outside the plane and then glue it all in. I saw this done in one of the builds on the German forum. Worked out very nicely.

I ordered mine with electric gear and brakes and they both work very nicely. Came with the Xicoy controller. Not sure who did the mechanisms.

The trickiest step (that I did wrong the first time and had a bunch of rework to do) was the nosegear door. The pivot points need to be as far back from the door opening edge as you can get them or it binds. In retrospect I should have seen this from the pics or from the shape of the cutouts on the ply formers... they have a "T" shape and the small screw that acts as the pivot needs to be in the horizontal part of the "T".

Being a bit old school I did not use the carbon sandwich formers and tank parts on mine, I traced them onto plywood (1/4 except for the piece below the wing tube which is 3/8) and recut them. Thomas told me I was nuts, I suppose he is likely correct :-)

Dave



Dave
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Old 01-02-2017, 01:11 PM
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Here are a few more pics of the install. As you can see I got the larger tank from Saleem Siddique at FCT in the UK. It is quite nice!

Included a photo of the nosegear mechanics, mains are similiar .. perhaps someone recognizes them. I know Turbo-Didi did the gear, but don't know if he or someone else did the jackscrew mechanisms.

I decided to make the supplied scale-looking pitot tube functional. I cut off the smaller diameter part of the original Tomahawk-supplied tube at the end where it's about 1/8" diameter and installed a functional pitot/static tube I had gotten years ago from the guys at RCAT systems .. has the usual dynamic port plus a ring of laser-drilled holes for the static port (it's the brass part).

I needed a removable mounting system for the pitot, so I elaborated a bit on the design of the spool valves in our retracts and made a part for the pitot tube and a mating socket epoxied into the nose of the plane ... this makes/breaks two airlines to go to the pressure sensor in the airplane. Hard to take a picture of the nose socket but looking at the plunger part on the pitot I think you can see how it works.

I am going to see if I can put all the service/startup items on the bulkhead at the back of the canopy to avoid removing the pilots and cockpits each flight (or attaching them to the canopy which is awkward on a plane this large). I have already mocked up all the fuel and turbine stuff on the rear plywood board in front of the tank, and all the electronics on the front board .. and I think I can squeeze what I need on that rear of the canopy bulkhead.

I am using Tom Cook's air traps, the Emcotec/DPSI 2018 battery/S-Bus system, Jet Central smoke system, Xicoy flight computer and electric retract controller, PB iGyro SRS, 2xFutaba 7003 RXs , BLS177SV servos, and a Jetcat P200.

Dave



Last edited by ww2birds; 01-02-2017 at 01:24 PM.
Old 01-02-2017, 01:43 PM
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Leardriver
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Dave those last few pics didn't come through....
Old 01-02-2017, 01:56 PM
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ww2birds
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looks like it handled them as attachments. odd .. perhaps it only works when I click on them. I'll repost.
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Old 01-02-2017, 02:13 PM
  #24  
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Interesting. I went with the larger tank option as well but used a Comp arf / Skygate Hawk tank and just modified things to take it. I also had to clip the tail pipe to avoid the turbine sitting right over the top of the tank. A couple of CG checks look like I shouldn't have any issues with it sat as it is now. I also ended up using Secraft servo mounts for the elevator / aileron servos. This solution works fine in the stabs without the mounts hitting the top skin.

The nose door pictures are really useful as I'm just about to tackle that job!

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Old 01-02-2017, 04:04 PM
  #25  
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I had to shorten the tailpipe too .. about 1/2". Never had a jet with such a long pipe!

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