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Sep 22, 2019, 12:46 PM
Retired CAD guy
birdofplay's Avatar
Thread OP
Build Log

Lockeys' VIKING 850 mm span


Per Lockey's request I've started this build log for the NEW version of the Vixen , NOW called Viking.
He also has a 750 version and a smaller "Travel " version.

See his Vixen thread for those details.
https://www.rcgroups.com/forums/show...Slide-or-Water

I just found out that Lockey started his own Viking thread Here
https://www.rcgroups.com/forums/show...-and-sea-plane
Sigh ...
Oh well ... I'll just finish my Build log in this one

Here I intend to chronicle my Cutting , and Build experience.

Just follow the Pix and Comments as I proceed along towards the Goal.

I had previously prepared the Cutting files for my CNC from Lockey's initial design effort.
So today was the 1st/prototype cutting session.
A couple of items need to be changed but mostly all went as planned.

It was proven that all the parts can fit in my standard shipping box.

Parts were quickly and easily removed from the two sheets of ModelPlaneFoam.

For glue up of Carbon parts I used BobSmith Foam Glue as all my bottled are getting old and need to be used up soon.
As for Carbon I am a believer that we ll use TOO MUCH carbon.
So In THIS build I am only going to use 4mm x .5mm CF blades glued on EDGE.
We will have to see if it's enough.
Although I have had great luck with a much larger,72" span , Crossbow that ONLY uses Bladed CF strips vs CF tubing !

For float tip parts I am suing Gorilla Fast Set - the white, foaming stuff.
I figure that for normal glue to set up they need to be exposed to AIR,
but with lamentations of material that is air tight a moisture curing PU type glue is best.
Just be judicious with the application as this glue FOAMS UP. and squeezes out.

At this point I am taking a lunch break and allowing the glue to set up.
Plus I am doing this initial posting in my new Viking Thread.

Fuselage assembly is next so "Stay Tuned"

C U L8r

Bob @ Hoosier Cutout Service
Last edited by birdofplay; Sep 22, 2019 at 02:11 PM.
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Sep 22, 2019, 06:43 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
Hey Bob, you didn't waste any time mate .. is that the 750 or 850 version ? ... oh I see its the 850 version

Didnt realise you would be on to it so soon .. I was in bed when you were doing this

Yes you got my building puzzle figured out .. I knew you would did you like the way I attached the booms to the horizontal stab ?

750 will only take up to a 8" prop whereas the 850 should take a 9" prop

Keep up the good (great) work my friend .. you seem to have a former in the wrong place in this pic Bob (see pic)

Formers all slide onto the centre spine .. except for the motor nacelle parts which attach to the top of the wing

Lockey
Last edited by Lockey; Sep 23, 2019 at 01:27 AM.
Sep 22, 2019, 07:34 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
I have closed the other thread Bob .. so here are the specs etc from that thread

This one is a variation on my Vixen sea plane, which was a variation on the renowned "Polaris which was also a variation on the great "North Star"

I think the 850mm wing span should be a really smart flier with maybe a 1000 - 1350 kv motor and a 8/9" prop .. should fly really slow .. and fast too

Once cut out should only take one and half to two days to build, this type of model is a very quick build and I have simplified the position of the 3 servos for ailerons, elevator and rudder .. I expect it to come in at about 700-800 grams including battery

I am thinking

2 x sheets of 6mm Depron (1000mm x 700mm) .. or similar .. MPF
Turnigy Aerodrive SK3 - 3530-1340kv motor or similar
8 or 9 x 4.5 prop
Plush 40A ESC
3 x 9 gram servos
5 mm CF tubes in wing, horizontal stab and 3 or 4 mm CF in booms

C of G should be on or around the step

This one named by Bob (birdofplay) "Viking"

I am away for a few weeks so I am trying to talk my good friend Bob into making the build .. go on Bob .. Do it

Lockey

By the way Bob, how does the size compare with the original Vixen that you have just built
Last edited by Lockey; Sep 23, 2019 at 01:25 AM.
Sep 23, 2019, 02:16 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar


OK, I gotta ask. What's that inserted in the tip of the Gorilla glue? Is that a trick to keep it from drying out? If so, I need to know more! Because I find that after some use the screw on lid is damn near worthless
Sep 23, 2019, 04:51 PM
Retired CAD guy
birdofplay's Avatar
Thread OP
:^}}}}
it nothing as clever as you had hoped.

I managed to Loose the cap and just grabbed a piece of CF rod that was in my scrap bin.

And Yes I AGREE that glue is a USE it or LOOSE it package.

Yet at less than $5 per 2 oz bottle it isnt as insulting as Foam safe CA
or that over priced Beacon glue .. ya know .. duhhhh

Edit later:

If you soak the gluegob Cap in Acetone it loosens up teh foamed up mess and it can be removed so the cap work again.

Acetone works on gobbed up and encrusted T pins too
Last edited by birdofplay; Sep 23, 2019 at 08:46 PM.
Sep 23, 2019, 07:34 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
I would try it Bob but we cant get the white here in Oz, only the yukki mucky coloured stuff and its $9.90 AU for the 2oz bottle (US$ 6.70)

Have you tried the clear non foaming stuff ?

I do like Foam-Tac though we cant get it here in Oz either, I sometimes get a few bottles from the USA but its not cheap, I tend to use the foam safe CA from HK and mostly use hot melt glue these days .. little heavy though

This is great (and cheap) for 3D printed stuff and none foam https://hobbyking.com/en_us/hobbykin...oz-medium.html

And this is what I use for foam https://hobbyking.com/en_us/super-go...foam-safe.html ..oooohhh and its on special VERY CHEAP AU$41.34 down to AU$23.50

Lockey
Last edited by Lockey; Sep 23, 2019 at 07:45 PM.
Sep 23, 2019, 08:33 PM
Retired CAD guy
birdofplay's Avatar
Thread OP
Oh man, I tried that stuff too but it sets way too slow for my tastes.
And it costs more than the Quick set white here too.

OK here's some more pix


I may just tape down the Top hatches and see if it flys.

Then I'll do a better job on hatch installation.
AND figure out some kind of cooling vent for the ESC

Don't look at those long Servo leads laying about in the front compartment.
I had some real long ones left over from my AeroTow Glider days and
just decided to use them up.

I found something called T-rex clear tape at Menards
Sticks real well to the foam.
I think it's going to work well for hinges.

All I need now are Horns and Control rods

Then I can weigh the whole thang too.

We'll have to see how tomorrows' winds are.
Fall is here now and the winds are picking up.
We had it real nice for the last few weeks. weather wise.

C U l8r

Bob @ Hoosier Cutout Service
Last edited by birdofplay; Sep 23, 2019 at 08:48 PM.
Sep 23, 2019, 08:47 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
Thats a BIG battery Bob and 4s too, I think I will be going with maybe a 2200/3s battery with mine

Maybe as well to change the formers at the front of the wing to have a larger hole so that "things" can easily be got at when the top is glued on .. OR .. maybe close off some of the front, move some formers and make the hatch further back eh, will see when you see where stuff has to be to get the CG right

Is there enough room in that small fuselage for all the gear ?

How many hours do you recon its taken to build it Bob ? .. I guess about 12 .. less with faster setting glue

Lockey
Last edited by Lockey; Sep 23, 2019 at 08:58 PM.
Sep 23, 2019, 08:52 PM
Retired CAD guy
birdofplay's Avatar
Thread OP
I think I could drop in a 3000mah 4s pak with NO Problems !

Maybe larger , but !!!

I used minimal sparing as you may recall so THAT will NOT be a likely experiment.

My GO TO motor is the 2826-6 with a 7x6 prop and 1300-2200 3s paks.

I may try that yet next week.

It would be terrific on the 750 size FER SURE !
Sep 23, 2019, 09:18 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar
Haha!

Well, it looked like a slick idea. I used to do a lot of woodworking and would use bottles of CA glue in different thicknesses. I fell for a marketing ploy where you bought what looked like 3/4" dia wooden balls with a piece of wire sticking out. The idea was to ditch the cap on the super glue and use the "glue saver top" as a bottle stopper. The wire would be inserted into the nozzle of the glue bottle and reduce the chance of it clogging. But all it really did was make the bottle of glue top heavy.....nuff said.....



Quote:
Originally Posted by birdofplay
:^}}}}
it nothing as clever as you had hoped.

I managed to Loose the cap and just grabbed a piece of CF rod that was in my scrap bin.

And Yes I AGREE that glue is a USE it or LOOSE it package.

Yet at less than $5 per 2 oz bottle it isnt as insulting as Foam safe CA
or that over priced Beacon glue .. ya know .. duhhhh

Edit later:

If you soak the gluegob Cap in Acetone it loosens up teh foamed up mess and it can be removed so the cap work again.

Acetone works on gobbed up and encrusted T pins too
Sep 23, 2019, 10:01 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
What is the weight Bob ? with and without battery .. I am guessing 550 ish grams without battery

Lockey
Sep 24, 2019, 09:13 AM
Tony Audsley Retired Locksmith
Lockey's Avatar
So the weight with everything except the battery is 14 oz then thats about 400 grams .. lot lighter than I thought .. very good

with the Battery looks like 23 oz = 652 grams Great

Any chance of a pic beside the Vixen for comparison of size

Lockey
Last edited by Lockey; Sep 24, 2019 at 09:20 AM.
Sep 24, 2019, 12:35 PM
Retired CAD guy
birdofplay's Avatar
Thread OP
I can do that next.
Of course MY Vixen is not as pretty as yours
and my Viking isn't going to be "dressed up" at all , oh well.

I almost have all the linkages ready.

I remembered a 2200 4s pak that I don't use much.
It's several grams lighter than that 2600.
However I expect It will completely go inside the Front compartment.

Unfortunately my grand daughters birthday is today
so the major part of this evening will be with her.
Otherwise I might have been able to do a maiden this PM.

Tomorrow AM fer sure but that cuttng close for your departure.
Sorry about that.

Bob


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