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May 30, 2018, 08:37 AM
Foamy and Glider fanatic
Blacky's Boy's Avatar

Check out the instructions


If you look at the PDF plans there is a write up that says, "Flying the Divinity - Toss at half throttle like a Frisbee. Leave Full Movement in control surfaces, just be gentle in pitch control until you adjust Exponential and Servo Travel to your liking"
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May 30, 2018, 10:09 AM
I Look, Listen, and Learn
Timbo383's Avatar
Quote:
Originally Posted by Blacky's Boy
If you look at the PDF plans there is a write up that says, "Flying the Divinity - Toss at half throttle like a Frisbee. Leave Full Movement in control surfaces, just be gentle in pitch control until you adjust Exponential and Servo Travel to your liking"
Yep, unless the frisbee toss is too difficult for the individual, then the discus throw would be better....unless you can't do that either, then a buddy tossing it for you is better ' that is, if your buddy doesn't toss it into the ground'....... then put wheels on it.
May 30, 2018, 12:44 PM
Registered User
sometimes there are better ways to do things, i found large wings too awkward to throw frizky style. doing it discus after a few experimental tries was easier.
May 30, 2018, 02:45 PM
I Look, Listen, and Learn
Timbo383's Avatar
Quote:
Originally Posted by bazsound
sometimes there are better ways to do things, i found large wings too awkward to throw frizky style. doing it discus after a few experimental tries was easier.
Yep, I have a 60 inch wing that I made the skin and ribs using dtf and it's a pain to toss one handed frisbee style...can't get a good grip without punching holes in it. I may need to practice my discus throwing and try that way.
May 30, 2018, 02:54 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar
So just like a DLG eh? I may try that.

I was getting to the point last night where it wasn't so much a toss as it was a "release" and let the glider fly out of my hands. When I actually "threw" it then I got into trouble.
May 30, 2018, 04:27 PM
I Look, Listen, and Learn
Timbo383's Avatar
I use the frisbee toss with all of my pusher type planes.....I like to keep my fingers.
Sometimes I forget and throw the tractors that way also.
Jun 10, 2018, 07:19 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar

The wing is dead. Long live the new Wing!


So I took my 42" D2 out on Friday night and then again on Saturday. What I learned is that I really suck at Frisbee tossing. And that if you hit the ground enough times you will break your flying wing so many times that repairs become impossible.

Divinty II Flying Wing 06 06 2018 (4 min 50 sec)


As you can see I did get it airborne. And while it was pitchy due to a loose clevis, I got to perform some flights. No doubt about it, I do like flying this

But at the end of the day the foam was cracked and distorted so that the thrust line was all screwed up. There was no more room for any kind of repair. Plus, I'm not loving those Dubro Micro Push rods. The fact that you have to solder a spring onto the end and then thread the clevis on is IMHO a joke. After a couple impacts the clevis will move or come loose. I just don't get them. I prefer a straight push rod with a simple Z-bend.

Plus I think that the fact that this was a KFm made it a bit less durable. The wing was bending at the cut out for the servos. If it was a KFm4 it would have had more meat there.

I am taking he lessons I learned with this wing and I will apply them to the next one I build.
Jun 11, 2018, 09:53 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar

Started on my new 42" D2 build


Last nightI cut out the parts for another 42" D2 but this time I made enough KFm steps to make it a REAL KFm4 wing. I also used Jack's idea of adding pallet strapping to reinforce the wing as well as making a filler piece for the back end. I gotta' say, this is a MUCH more substantial wing now. It's still light but it's got a lot more "oomph" where it counts. I need to let the glue dry and I'll probably finish up the major build tomorrow. I want to add a piece of EPP to the back to give me a better, more resilient motor mount surface. I saw one person on here cut a slot in a piece of similar foam to make a kind of motor pylon. That's pretty much what I want to do.
Jun 19, 2018, 01:22 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar

not so dead yet,.....


OK, ok, ok,....
Even though I am 80% completed with the build of the new and improved version, I just could not bring myself to ditch my current KFm 42" D2. I reinforced the flimsy areas with a mix of small and large BBQ skewers, some hot glue, more colored packing tape, and a touch of reinforced packing tape. It looks UGLY!! But guess what? It flies just fine! And since it's beat to hell I don't mind practicing my frisbee launch technique with it. I had a blast flying it on Saturday and Sunday. Plus I think I got this launching thing down now.

Before I added any colored packing tape to the brand new KFm4 42" D2 I weighed it and it came in at 160g. Much to my surprise after adding the tape it weighed 190g. So I added 30g (1.0 oz) worth of tape???? That certainly was an eye opener. I'm not terribly concerned with the weight at this point because my previously mentioned KFm 42" D2 got so much added to it recently and it still floats along just fine. Plus other than the electronics I don't plan on adding anything else. So I should come in with a manageable weight
Last edited by Blacky's Boy; Jun 19, 2018 at 06:25 PM.
Jun 19, 2018, 06:07 PM
I Look, Listen, and Learn
Timbo383's Avatar
Yep, 1 oz sounds about right if you fully covered your d2. I have a roll of old usless tape that I may tape out a 42 inch wing pattern just to see if it equals an ounce if I get bored enough.
Jun 23, 2018, 04:23 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar

42" D2 V2,...done!


I finished up the main construction of this 42" D2 wing and THIS time I made sure to make it a KFm4 wing. As I mentioned previously, I added some pallet strapping along the wing to make it resist bending a bit more. I also added 1/16" CF rod across the back near the motor.

To give the motor mount something more substantial to attach to I added a 1/2" EPP spacer on the top and a 1/2" EPP keel on the bottom. This gave me the room to use the fore wall mounting dowel trick Jack uses. It makes for a VERY strong motor mount. I also gave each elevon a full length piece of 1/16" CF rod. I went with a Blue Angels theme for the color. It's just Navy Blue and Yellow vinyl packing tape from Tape Planet. After adding the tape and then installing the covered winglets and elevons, it weighed 203g

After some thought and some research into what others have done, I ditched the Dubro Micro control rods. They are just too much of a pain. They might be great for threading through a fuselage. But I found that the bend puts stress on the control horns. I mounted the servos out on the wing as many others have done and ran a sort section of control rod to the control horns.

Here are the specs
AUW 467g (my previous version was 435g! So, not too shabby!)
Suppo 1400 kv Motor
8 x 45 Slow Fly Prop
Emax 20A ESC with 5v BEC
Lemon DSMX Rx
Emax Servos
1300mAh Lipo

I'm not sure when I'm going to maiden this. The forecast indicates this weekend is a wash out. But with the experience I gained from my first 42" D2 I'm a lot more confident about making a first flight.
Jun 25, 2018, 09:13 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar

42" D2 (KFm4) Mk II Maiden SUCCESS!


Before you ask, no video. I didn't bring my camera on purpose. Every time I try to film a maiden it ends up going badly.

I just got back from maidening my newly completed 42" D2 (KFm4) Mk II and let me tell you, it was totally uneventful! It was a beautiful night with pretty much no wind and no one else at the flying site (boy did everyone miss some prime flying weather!!)

First toss was a dud. DIdn't follow through and landed sort of hard. But due to the toughness of this wing, absolutely no damage. Second toss up I just let it go and it just flew out of my hands. After that it was smooth sailing. I flew it for 4 more flights, each one a freakin' delight!

The only plane I made that behaved this well on it's maiden was my good ole' Blue Baby 42

Maybe 42" planes are the size for me?

Anyway, if it's as nice tomorrow night I might try to fly again. This time I'll take some video
Jun 26, 2018, 07:24 PM
Registered User
Congratulations!
Jun 29, 2018, 07:42 AM
Foamy and Glider fanatic
Blacky's Boy's Avatar

2nd Maiden Video


Got out last night and managed to film my KFm4 42" D2 in flight. In a second flight I found that it flies really well with Runcam HD on the front.

Divinty II KFm4 Flying Wing 06 28 2018 (5 min 57 sec)


I'm really impressed with this wing. I wish I had built it sooner.
Jul 09, 2018, 12:47 AM
Registered User
SilbernerSurfer's Avatar
I want to build one too!

Where can I get this latest D2 version?

Is this the plan from page 1?

What has changed compared to D1?

Thanks in advance!


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