Carsten is that a Ikea Board floor in your Viper?

G-DAY HANGERMAN
Allup the nose 5200 li ion 2 on flight side 2 on ecu with the 160sx need power for kero start with no hangups with power
REGARDS JOHN

Carsten,

Make sure your front cockpit tub fits with them there mate!

Cheers,
Mark

Well Chaps,

Some more tinkering done, here is what I achieved so far. Made a cradle for UAT out of Balsa laminated with thin ply on the outside edges only. Connected up all the tanks and pump and locked wire where necessary, now ready for turbine install. Finished the cut out on the rear cockpit tub, modified rear seat for pilot so it sits better otherwise his head touches the Canopy, looks happy enough in his new home, wait till he gets flying, that will wipe the smile off his face! Mark do you reckon he looks like Kevin Saunders? Some more pics for you.

H

Already done Sir
Although the Viper is big, there is not (too) much room inside when the big tubs are installed.
I have 3 mm clearence between the bottom of the front tub and the valve, so it will just fit!
PS: hangarman, looks very good !

G-DAY
I know they are on the small size but I can live with that

TRY AGAIN

nice!

i still have a George W somewhere..
will mollest him to fit the viper..

Guys,

Just making a few tweaks to my ViperJet ready for some winter flying and wondered what the general consensus was on canopy retention mods?

Are people fitting hooks to stop the canopy lifting or tabs to stop the canopy bowing in/out? Looks to me as if hooks will be a pain to fit as 'hooks' due to the limited backward movement.

Let me know!

Cheers,
Mark

All of the ones I have seen have had bvm style hooks and worked well. They shouldn't be too hard to fit, I've got some pics of Ali's somewhere, I'll have a look in the morning

I'm going to use the BVM Canopy "hook" mainly as tabs. It all depends if there is enough backward movement of the canopy to release the hooks (if they were to be used as intended). I imagine with the fittings at the front of the canopy and the latch at the back it should be suffient, and they can be used as "tabs". Asyou said it will be interesting to hear what the other guys have done or their "take" on it.

H
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HI MARK
Have made and fitted tabs to mine,But allso intend to make a dummy cockpit cover to extend to both sides at the back tub,Shall be starting it today so so post some shots as I go along
REGARDS
JOHN

Have been at the cockpit cover, Having not used my front cockpit cover I made my own so had one left over, So now have stuffed around and am fitting it as a cover for the rear tub and will hysol to canopy, Whitch will brace the whole unit sounds like a lot of @(&%*$ shall add some shots.
REGARDS

SOME MORE

We started to plan the turbine install last night and noticed something weird.

Has anyone else noticed that the rails for the turbine are at the wrong angle? Looking from the back of the fuz, you can see the rear of the intake is in line, but the front of the turbine rail is about an inch higher than the back of it, which puts the Turbine on a toatally different line to the thrust tube and intake. I thought it might have just been a mistake on mine, but we took the cover off Ali's Viper and it's exactly the same. Ali hasn't had any problems with it as it is, but i was puzzled as why something as basic as alignment could be so far out.

Ali's has the tailcone of the 160 aligned with the center of the thrust tube, but the front on the turbine is higher due to the rail

Duncan

Could it be intentional? I only ask, because if you see the thrust line on a BVM Kingcat thats the same. I cant see why the Viper should be like that........but then again I'm no aero dynamists! Iwill check mine on Friday. Are you going to ask Anton?



H

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I can't see how it could be, the thrust line is determined by the thrust tube isn't it? all this is doing is pointing the gases at the bottom of the thrust tube, rather than down the center of it. Then again i'm new to all this, but my head says it's wrong

Interesting, but you saidAli's tailcone of the 160 is aligned with the center of the thrust tube. Thats why I ask have they adjusted the thrust line for some reason? Or does it appear to look wrong? I will look forward to having a look at mine, or reading what the general consensus is. Here is my drawing as to what I understand the issue to be. I'm Laughing here, as I dont have a scanner, so I took a photo with my phone, emailed it, and then attached it to this!

One other question to you guys, Talking of thrust tubes, I notice in the "instructions" it states that the Thrust tube should protrude 10mm past the rear former which has yet to be glued in, does the thrust tube protrude past the fuzz at the rear, when I had a general fit when I first got it, the thrust tube seemed a tad short of the rear of the fuzz.

Sounds like I have a interesting job on the wings to come! Mark do you still have that pic?
H

The former can't go far enough back to only have 10mm of the thrust tube prtruding it. Stve built Ali's with the tube 5mm back from being level with the back of the fuz.

yea i think it's an optical illusion mate. It looks centred but it's actually pointing towards the bottom of the thrust tube.

then check the nottom of the pipe that must be really Blue and a big difference with the top of the pipe..dangerous!
you can also use a piece of strait balsa and put it on top of the Bearer and mount it backwards , now you should see the true position
if they are in 1 line all is ok , even if the complete thrustline pointing downwards.

That's not good mate. Won't that increase the chance of a pipe failure too?

I'd get the man to have a word with Anton and check what it's all about. Mine all lined up fine (not bad for a pre-production kit hey Al? )

Duncan,

Oh thats a shame it doesn't protrude past the fuzz.

If thats right as your drawing, that's not good! As the boys have said tailpipe could fail. Thrust tube has at least got to be inline with turbine output.
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My kit is about a month old & the build is finished. I just checked my turbine/tube alignment & it is perfectly straight. I am using a Wren 160 turbine.

I think its an optical illusion..
The turbine is definitely in the middle of the pipe and there are no hot spots anywhere down the length of the pipe. Plus as beautiful as you drawings are guys I think they exaggerate the angle just a tad
Mark.. Hows the nose on your viper jet?