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Old 12-17-2012, 05:12 AM   #1
DHC Beaver
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Default Focke wulf ente

Hi,I thought I'd show a few pics of my current build.It's a canard design from the late 20's.Designer George Wulf actually got killed when he crashed oone of the 2 prototypes.
http://www.google.co.nz/imgres?num=1...9,r:1,s:0,i:90

I got the plans on ebay from a fellow in Canada.It's an old english plan,which I had my eye on years ago,before it disappeared from the plans catalog.
Anyway,here's a couple of views of the fuselage:




As you might be able to see the sides are foamboard with the paper removed(what a job).The stringers are 3/16 balsa.There are 2 main bulkheads from foam,and the rear one has ply reinforcement ,as the wing dowels plug into it.
I haven't weighed the fuse,as it's not quite finished,but it feels pretty light so far.
Here we have a shot of the basic wing.Foamboard ribs,with balsa spars and sheeting,plus rib caps.


The ailerons are a 1/16th sheet core,with 1/8 ribs glued on,then sanded to shape.
Next is the stab with separate elevators.On the real one,they are hinged on oddly shaped brackets,but this didn't seem very strong to me.Hence I used plastic "flap"type hinges from HK.They will be glued and screwed to the rear of the bottom sheeting,filled with trailing edge stock at those locations.


Finally,a shot of the fin.Again,a 1/16th sheet core,but with foam ribs,except for the top and upper leading edge.This portion of the fin has a straight edge,as the front portion is attached to the wing.


Currently,I'm working on the music wire struts for the stab,and the wire undercarriage.Next on the board will be the nacelles,which will also be foam based.
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Old 12-17-2012, 06:28 AM   #2
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Great subject. I love the oddball stuff, especially Luftwaffe subjects. The first pics reminded me of the Dornier Delphin, which I was debating when I decided to build their Gs recently.
I can't remember if it was on the web or the internet, but there's a full scale version of this plane, or at least a very similar version or replica that is flying now.
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Old 12-17-2012, 07:26 AM   #3
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Hi
Outstanding
Great work so far
Do enjoy
Take care
Yours Hank

"When wild the head-wind beat,Thy sovereign Will commanding, Bring them who dare to fly, To a safe landing."
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Old 12-17-2012, 08:02 AM   #4
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Neat build! And fascinating choice of subject! I also love to see the rare ones. Keep up the good work and please keep us posted!
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Old 12-30-2012, 11:35 AM   #5
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Congrats to your nice build up! That`s the first build up thread about a Focke Wulf FW 19 I`ve found, and `m looking for years! I collected pictures, data sheets and 3 views of the FW 19, but it was not possible for me to find a plan for a rc model. I`ve started to construct an own plan. I also calculated aerodynamic datas, but in the moment Im not sure if this calculation is correct.
Can you tell me facts from your model, like position of CG, the wing-profiles, angel of setting, scale and your expected AUW, electric or glow drive? And do you know a source for a plan nowadays?

I cant wait for your maiden flight.... and it would be nice to get some further informations! Thanks a lot!
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Old 12-30-2012, 08:58 PM   #6
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Hi,Quissel,here is where I got the plans:
http://www.ebay.com/itm/Plans-for-Fo...item53f2850c1f
It's an old english plan,that's probably been re-inked.Perfectly fine.
The plan is for 2 x .15 engines,but I'm going to use 2 of these:
http://www.hobbyking.com/hobbyking/s...ner_Motor.html
I also use 2x50A esc's,and 2 x 3000 mah lipo packs in parralel.
I don't know what the all up weight is going to be,but I'm hoping for 2-2.5kg.The wing profile doesn't seem to be a specific section.
The c.g. is about halfway along the straight roof section.
I'm using a bit of foam here and there to keep weight down.Currently working on the nacelles in foam.I'll be flying of grass,so i'm using larger wheels as well.
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Old 12-31-2012, 12:49 AM   #7
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Really interesting plane DHC. Looking forward to seeing more as the project progresses!

Take care and thanks for posting at WattFlyer!!

Don
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Old 12-31-2012, 03:47 AM   #8
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Looks good!

impressive video... it looked as if the aircraft was close to stall at the slow speed high AOA

Dave
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Old 12-31-2012, 11:36 AM   #9
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Thank you DHC! I ordered the plan just in the moment!
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Old 01-08-2013, 10:20 PM   #10
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Hi, DHC Beaver, I have got the plans today.
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Old 01-09-2013, 06:50 AM   #11
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Excellent,Quissel,have fun building this unusual model.I'm at a bit of a standstill at the moment,since I stuck my finger in a bandsaw bladeLuckily,it only cut my nail in half(!),but I need that finger for building
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Old 02-19-2013, 12:53 AM   #12
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Sorry about the lack of updates,been a bit busy.
I made up the struts for the elevator out of 3/32 piano wire and brass strip


I've also done the nacelles, cowls,and cockpit cover.They are 1/2" foam sandwiched together,then shaped with various grades of sandpaper.
Then i covered all pieces with old dress pattern paper.It's very similar to model tissue,and applied with thinned aliphatic resin glue.
Then 2 coats of water-based polyurethane varnish,and the pieces have since been painted with silver acrylic enamel.


Unfortunately,the edges of the cockpit cover melted slightly,due to the paint being thinned with mineral turps.
I wasn't altogether happy with the fit of the cover anyway,so i'll line the affected areas with 1/16th balsa,and shape to fit.
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Old 04-28-2013, 08:50 PM   #13
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Hello DHC Beaver,

Noticed your thread on the Ente and also the fact that you use Ollie B. Bommel & Tom Poes as a mascotte - the logo of the town I live.

If you are interested, I am happy to supply you with a PDF of the original article that goes with the plan - it has been published in RC Scale Aircraft, spring 1987.

Please let me now if this would be of any use to you.

Best,

Arado
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Old 04-28-2013, 11:12 PM   #14
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Hallo.Arado,I would appreciate a copy of the build article.I'll pm you with my details.Thank you very much
I was born in Den Haag,and emigrated to new zealand in 1970.
I always liked ollie and tom poes comic strips.
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Old 06-09-2013, 07:40 AM   #15
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Just spent a bit of time on the ente.
I was a bit disappointed with the foam cockpit coaming,so i have decided to redo it in balsa.

A fair bit of carving and sanding ahead
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Old 08-16-2013, 02:12 AM   #16
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A little update on the Ente build.I've covered some of the parts,like the canard,rudder,ailerons,etc.


The elevator hinges are a bit simplified from the plan version.I used HK flap hinges,turned end for end,and fitted them on angled blocks of ply.I also ground a small recess in the main hinge part,to get enough up elevator movement.


Next I will cover the bottom off the wing,then fit the aileron servos.I'll be using HK's mg90 metal geared servos.I have found them to be smooth and reliable units,and use them on all flying surfaces.At $5 a pop,they are also good value.

I'm using HK,s silver covering,and I'm in two minds about it.
On the one hand,it's fairly light,and sticks good to flat surfaces.On the minus side,I seem to have a few problems using it on compound curves.It just doesn't seem to stick so well in those areas.Maybe I'm overheating the covering,as it does seem to go on at a lowish temperature.Anyway,I've now started using balsaloc on compound curved pieces,which improves the "stickability".
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Old 09-08-2013, 09:05 AM   #17
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another small update.
I've finished the wing fins.Because they seem rather vulnerable,I made them removable.2 small pins on the bottom of the fins locate in holes in the wing rib cap.


I've used shirring elastic as guy wire.The elastic is tied to hooks made from soft wire.There is very little stress on them,so i think it will be strong enough.After tying the 2 knots,they were soaked with thin cyano,and spritzed with accellerater.The hooks fit on split pins glued into the wing.


This is how the fins sit on the wing:


As you can see,the nacelles have also been fitted to the wing.
I've also fitted the servo's in place for the ailerons.


The tape is just to tidy up the wire,not to hold the servo in!
That's all for now.
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Old 10-01-2013, 03:09 AM   #18
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I got a bit more done on the Ente.The rudder has been fitted,and the push-pull linkage added


The rudder horn is half of an old Futaba servo wheel,those huge things that nobody found any use for


For some reason,the close-up makes it look real grotty,but it's actually nowhere near as bad as it looks.Honest!
The 2 esc's are velcroed to the fuselage cabin floor.


They are 50A opto ones,I'll be using a 2-cell LiFe pack for the rx supply.
The nose wheel installation is also done.The hardest job was removing the tyre from the wheel,so i could paint the wheel black.

The velcro strip is where the 3000Mah 3-cell batteries will sit,1 on each side.
I'm currently finishing off the nose block.
Look Ma,it's got rabies!


The lightweight spackle is called "Red Devil",an Australian brand .Magic stuff.
I'm on the home stretch now.I've printed off some call number decals for the fuse and wing,but I think I'll wait until the fuse is completely finished before applying them.They don't seem all that strong,even though i sprayed 2 coats of clear acrylic over them,as recommended .
Just wondering if Quissel has started on his build yet.It would be great to see another person's take on this oddball craft.
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Old 10-02-2013, 01:55 AM   #19
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Outstanding work. Looked like Wulf spent too much time in the bier garten one night. Makes one wonder what goes through the mind of genius. Very unusual and interesting. Won't see this one appearing on HK's site anytime soon.-LOL
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Old 10-02-2013, 11:54 AM   #20
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Looks very good so far and it sure is a bit unusual to see.
Looking forward to the finish and the flight.

Crash

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Old 12-13-2013, 11:09 PM   #21
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The "Ente" is finished.Just waiting for some un-windy conditions so i can test fly it.
Here are a few pics of the finished product.Sorry about the cluttered background,that only became obvious once I had downloaded the pics to my comp.









The pilot looks to be a bit undecided.
The rx is a Frsky 7ch V8, with a Turnigy 9x/Frsky with er9x tx.
Battery power is 2 -3000mah Li-polies in parallel,and rx is powered by a 2 cell LiFepo4 pack.
All servo's are Turnigy MC90 metal geared jobs.
Hope to have a flight report sometime next week.
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Old 12-13-2013, 11:17 PM   #22
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Wow !

Looks like Willie Messerschmitt and Kurt Tank went out drinking one night and after a few Steins drew something up on a bar napkin. LOL Very interesting ! Nice Job !
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Old 12-14-2013, 04:24 PM   #23
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Waiting for the flight report!
Cool Build!
Crash

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Old 12-17-2013, 07:54 AM   #24
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Well,test day has come and gone.Against all expectations,it was a puddytat.Very stable and smooth.I'm quite happy with it's performance.The first take-off run was aborted,because I was so intent on steering,I forgot to give it up elevator!
Here's a stitched together video of 3 clips my friend Paul took with my camera:


Did you notice the pilots stylish flying attire?
You will see on the landing that it turns sharply left when stopping.This was caused by the undercarriage wire pulling out of the fuselage tube,not helped by my fairly hard "arrival".
I've also noticed one of the canard struts has come loose.I will have to rethink the whole attachment of the canard,as it was wobbling about like a drunken sailor.Makes the wonderful flight characteristic even more surprising.So a bit more bench time required before the next flight.Thanks for your interest.
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Old 12-17-2013, 01:31 PM   #25
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Well congrats on the maiden flight.
Well done.
Crash

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