HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Dec 26, 2013, 05:51 PM
Registered User
Greece
Joined Jul 2013
114 Posts
Discussion
Building my DLG

Mary Christmas …to all of you.!..
Thank you all for your help cause without your help that would be impossible.!
I used the airfoils of ZONE V2 2P for the main wing
And for the fins I used the EDGE airfoils.!
Thanks GT!

Ok lets go….
I was not satisfied when I was cutting the cores with hand so I decided to create a feather system.
Is very simple but very effective.!
It is working perfectly.!
So I created in no time some cores to work with.!
I have two more in stock to do my tests with the fabrics.…
Do not forget I am still in the learning curve…
I am cutting a left wing in these photos
Name: 01.jpg
Views: 191
Size: 114.7 KB
Description: Name: 1.jpg
Views: 180
Size: 94.7 KB
Description: Name: 2.jpg
Views: 172
Size: 85.8 KB
Description: Name: 4.jpg
Views: 177
Size: 104.8 KB
Description:

I am using a fishing equipment to pull the hot wire
Name: 3.jpg
Views: 184
Size: 108.5 KB
Description:

Some photos
Name: 6.jpg
Views: 199
Size: 133.4 KB
Description: Name: 7.jpg
Views: 204
Size: 112.8 KB
Description:
Name: 8.jpg
Views: 197
Size: 124.3 KB
Description: Name: 9.jpg
Views: 198
Size: 86.8 KB
Description:
Name: 10.jpg
Views: 231
Size: 130.6 KB
Description: Name: 11.jpg
Views: 220
Size: 98.6 KB
Description:

I put peelply in this wing to test it. The next one will have a kevlar hinge.!
Name: 12.jpg
Views: 287
Size: 129.4 KB
Description: Name: 13.jpg
Views: 246
Size: 125.4 KB
Description:

I had never used carbon before. So I decided to use Carbon to join the wings.
I know that the aesthetic is bad but I dont mind for the moment.! I had to use Carbon to work with I could not hold my self and I realized cutting carbon is not the same as cutting glass. ###The measurement is wrong look below for an accurate weight measurement ###
Name: 14.jpg
Views: 236
Size: 294.4 KB
Description:

Here is the total weight with the servos,horns and pushrods. Please I need your opinion for the weight.
Name: 15.jpg
Views: 220
Size: 316.8 KB
Description:

Lets cut some fins.
I saw that cutting fins by hand it was much quicker than using the feather system.So I cut all my fins by hand.!
Name: 16.jpg
Views: 170
Size: 202.4 KB
Description:

Bag a set for the first glider.
Name: 17.jpg
Views: 170
Size: 187.6 KB
Description:

Once again I used Carbon in the process I could not hold my self I wanted to see the carbon after the bagging. After all it gives strength for a weight penalty.Man this horizontal is thin!!
Name: 18.jpg
Views: 164
Size: 302.8 KB
Description: Name: 19.jpg
Views: 157
Size: 305.1 KB
Description:

Thats heave for sure.! I need your opinion again. Oh and never use the tools you were working with carbon on glass......or you will have this ugly hair of carbon in the glass
Name: 25.jpg
Views: 228
Size: 151.4 KB
Description:


Making the horns.I decided to create my horns from carbon .I put the patch between two glasses (on the right of the photo ) and put some weight.!
There are very strong and very thin..!
Name: 21.jpg
Views: 156
Size: 277.7 KB
Description:

I decided to DO IT! Ok this is my first mould.! This is totally a test to be familiar once again with the process and with the materials. I have to say go for it.
I create a small plug from clay. I shape it to an aerodynamic shape by hand and sand it. I then put 3 coats of epoxy. This took three days I sand it again and then I polished it with the release materials.! Since I am buying all my materials from r-g I followed this procces exactly youtube video
I have to say that I did not take any pictures of the complete plug. I am sorry for that but I never believed that I can make it! The plug was broken whan I was trying to get it out from the mould. But it broke for a reason.!
I had put 3/4 of plug inside the mould and that was one of my mistakes.! so the mould totally grab the plug and I had to break it to release it .
At the tail section of the plug I did not put release agents on purpose. I wanted to see the behavior. The edges are awful ok I can see that
So in conclusion .....
I have to take care the edges of the plug on the mould to get a perfect edge.
I have to use release agent to all of my plug
And last I have to create 2/4 of the plug on one mould.
Any advice will be totally helpful. Jonas has some excellent thread on it and I believe I know it by heart!
Right know I am making a new plug from clay but now it is full sized. I will take some pics
Name: 22.jpg
Views: 176
Size: 313.4 KB
Description: Name: 23.jpg
Views: 135
Size: 316.9 KB
Description:


The materials that I used to create the mould
Name: 24.jpg
Views: 144
Size: 302.0 KB
Description:

Always welcome for suggestions and advices..!!
Right now I have a fuselage to test my wings but it is not my construction YET
I ordered and waiting some items to complete my construction.
She will be rudderless for start even if I put peelply in the vertical fin.
Until next time...

Thank you all....
Happy New Year.!

DLGjunkyard Thanks for the tips and the inspiration !
mbarboun is offline Find More Posts by mbarboun
Last edited by mbarboun; Dec 27, 2013 at 02:39 AM.
Reply With Quote
Sign up now
to remove ads between posts
Old Dec 26, 2013, 06:55 PM
Elitist Sub-group
rdwoebke's Avatar
United States, IN, Indianapolis
Joined Feb 2004
13,880 Posts
Nice work!

Ryan
rdwoebke is offline Find More Posts by rdwoebke
Reply With Quote
Old Dec 26, 2013, 07:16 PM
Registered User
doc993's Avatar
United States, WI, Stoddard
Joined Dec 2009
1,098 Posts
Nice work , you are a little farther along in the wing building than I am, but I will be ramp-ping up this year.
doc993 is online now Find More Posts by doc993
Reply With Quote
Old Dec 26, 2013, 08:01 PM
Registered User
United States, NY, Buffalo
Joined May 2013
786 Posts
Did my post get deleted? Just said your tail surfaces are extremely light. Haven't seen many below 12 grams.
DrewV is online now Find More Posts by DrewV
Reply With Quote
Old Dec 26, 2013, 08:14 PM
Registered User
Steve 0's Avatar
United States, UT, Draper
Joined Dec 2012
1,767 Posts
VERY NICE hotwire set up! Looking like a great start. Far more ambitious than me.

I can barely keep up with repairs on mine. Looking forward to seeing ot fly!
Steve 0 is online now Find More Posts by Steve 0
Reply With Quote
Old Dec 27, 2013, 12:37 AM
Now fortified with carbon
DLGjunkyard's Avatar
Canada, ON, Puslinch
Joined Apr 2010
2,621 Posts
Excellent Manos. Im glad you posted. Build threats have fallen off on this forum the last few years.
I'm also a bit amazed with your tail weights. Am I looking at both parts sitting on the scale under 8 grams? My tails average around 7 -7.5 each.
DLGjunkyard is offline Find More Posts by DLGjunkyard
Reply With Quote
Old Dec 27, 2013, 02:13 AM
Registered User
Greece
Joined Jul 2013
114 Posts
@DrewV I am non saying that the tails are light I am telling that the horizontal fin is very thin.
I am expecting to be heavy since I used so much carbon for the horizontal.
But since DLGjunkyard is amazed with tail weights I will weight them again separately maybe the horizontal fin touches somewhere else and missed an accurate measurement.
mbarboun is offline Find More Posts by mbarboun
Last edited by mbarboun; Dec 27, 2013 at 02:36 AM.
Reply With Quote
Old Dec 27, 2013, 02:35 AM
Registered User
Greece
Joined Jul 2013
114 Posts
Ok here are the new photos for the tail fins.
I am very sorry I did not take an accurate measurement first place.!
You are both correct.!
Name: 1.jpg
Views: 219
Size: 157.7 KB
Description:

Name: 2.jpg
Views: 208
Size: 253.3 KB
Description:


What about the main wing weight guys..?
Is clay a proper material for the making a plug ?
mbarboun is offline Find More Posts by mbarboun
Reply With Quote
Old Dec 27, 2013, 01:51 PM
Registered User
Steve 0's Avatar
United States, UT, Draper
Joined Dec 2012
1,767 Posts
Both wings coming in at 130 or less grams is a good target to shoot for. That would be unjoined weight. 120g is looking real good. AND i am not a builder but stayed at Holiday Inn earlier this year.



Going flying now.
Steve 0 is online now Find More Posts by Steve 0
Reply With Quote
Old Dec 27, 2013, 02:05 PM
Registered User
United States, NY, Buffalo
Joined May 2013
786 Posts
If the tails are coming out at roughly 17 grams total, I would expect the wing to come out at around 170-180 grams. I don't think there's any way you could hit 130 if you use the same technique with the wing that you did for the tails.

But you've got at least one wing made already, right? What does it weigh?
DrewV is online now Find More Posts by DrewV
Reply With Quote
Old Dec 27, 2013, 02:16 PM
Elitist Sub-group
rdwoebke's Avatar
United States, IN, Indianapolis
Joined Feb 2004
13,880 Posts
This is your first build. Those weights are a little on the heavy side and the model itself will probably be 300 grams or so but you will have a great flying model and you'll have lots of fun. If this is your first your next ones will be even nicer. I look forward to seeing more of your builds.

Ryan
rdwoebke is offline Find More Posts by rdwoebke
Reply With Quote
Old Dec 27, 2013, 05:32 PM
Registered User
Greece
Joined Jul 2013
114 Posts
I hope..to have some fun with it since its heavy enough as I can understand rdwoebke!
Yes DrewV I have one ready now and it weights with the servos, the connector and the pushrods 169,1gr. There is a photo in the first post. Tomorrow I will bag another wing and I am going to use a different method for the spars. Basically I am not going to use 4 pre cured spars in each half wing.
I am going to use only fabric Textreme 38grUD 20mm. I will put 2 rolls of 20mm in the upper side of the wing and one roll of 20mm at the lower. At the LE I am using 125gr UD 25mm. I believe it will be strong enough.
I need your opinion for my second wing.!

Thanks
mbarboun is offline Find More Posts by mbarboun
Reply With Quote
Old Dec 27, 2013, 07:03 PM
Elitist Sub-group
rdwoebke's Avatar
United States, IN, Indianapolis
Joined Feb 2004
13,880 Posts
What type of glass?


Ryan
rdwoebke is offline Find More Posts by rdwoebke
Reply With Quote
Old Dec 27, 2013, 07:58 PM
Now fortified with carbon
DLGjunkyard's Avatar
Canada, ON, Puslinch
Joined Apr 2010
2,621 Posts
Your weights seem about right for a new bagger. The carbon you are using looks a bit heavy and it soaks in a lot of resin.

As for your new wing I think you should use the 125 gram unicarbon for the spars and the 38 gram stuff for the LE . The spar takes care of the bending loads, the bias glass takes care of the twisting or torque loads and the LE just needs to take chunks out of your shins and handle mid air collisions . [armor]

From the looks of your first wing you could afford to remove a bit more excess resin.If you cant see a few voids within the weave of the fabric and the surface is completely glossy smooth your probably carrying a bit of useless weight.

If its the 1.6 0z glass you are using you could follow what I do and that is use papertowels followed by toilet paper to debunk. If you get as much resin out of the glass as you can with just some body pressure the toilet paper will leave about the right amount of resin behind to get a nice finish surface. If you debunk under vacuum the surface will be a bit rough and you will feel the fabric texture.I rarely debunk under vacuum. Its not necessary.

One thing about unispars
The failing point is often the spar to foam bond in the top surface. The spar will first lift from the foam and then buckle. By using a lighter thickness unicarbon you can increase the surface area that the spar is glued to. The 38 gram uni seems a bit to light though. Recently I have been using 80 gram uni spars but haven't yet had a chance to fly with those wings.

You might learn a bit more about uni here as well
DLGjunkyard is offline Find More Posts by DLGjunkyard
Reply With Quote
Old Dec 28, 2013, 02:38 AM
Registered User
Greece
Joined Jul 2013
114 Posts
Ryan I am going to use 25gr balanced glass after DLGjunkyard's suggestion.
I have seen his blog and the way helays the 2 layers in each side and I will follow his way.
I am going to put 2 layer in each side of the wing.
What is your suggestions for doublers on flaperon?
Basically I also have 49gr glass but it is not balanced. and I am thinking not to use it.
Excellent thread Jeff.! Thanks
The thing is that I have bought different materials for the spars to do my tests.
But I am not going to bag my next wing yet until you guide me guys.
So what I have right now.
Carbon tow 24k 1600 tex.link
38 gr Textreme UD 20mm link
100gr 20cm HM UD link
125gr UD tape 10mm link
125gr UD tape 25mm link
80gr Carbon fabric.
61gr Kevlar link
These are the items that I have and the amount is approximately for my next two wings cores that are already cut and ready to bag. I only have to chose the way that I will bag them

Jeff now that you know all the materials that I have do you still believe to use the 125 gr for the spar and the 38gr on the LE?
Suggest me a width for the kevlar hinge please.
I have to tell you that after reading the thread I am thinking to put a line of tow in the core as in this video..link
He did not used a spar cap.

Waiting your suggestions and opinions.!
Thanks
Manos
mbarboun is offline Find More Posts by mbarboun
Last edited by mbarboun; Dec 28, 2013 at 05:40 AM.
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion My first DLG experience... xStatiCa Hand Launch 158 Jan 22, 2014 09:48 AM
Discussion My first quad...also my first multicopter build. austinlam123321 Scratchbuilt Multirotors 0 Nov 19, 2013 08:51 PM