RE: Scratch Build Project Airway XY-9 Test Aircraft  
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All Forums >> RC Airplanes >> Scratch Building, Aircraft Design, 3D/CAD >> RE: Scratch Build Project Airway XY-9 Test Aircraft
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RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/17/2008 8:56:34 PM   
BMatthews



Posts: 9053
Joined: 10/4/2002
From: Burnaby, BC, CANADA
Status: offline 		Yeah, they've been having issues with the data base. They keep restoring from backups but the more recent posts are then lost.

Hopefully you read my pearl of wisdom before they vanished like a soap bubble popping...

The management is promising that they are on track to get things fixed soon.

_____________________________

Witty saying to be plagarized shortly.....

(in reply to Lafayette)
       Post #: 26

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/18/2008 7:02:24 PM   
Lafayette


 

Posts: 16
Joined: 9/10/2007
From: Geneva, , SWITZERLAND
Status: offline 		Well here I placed one single bottom main spar through the winng and glued on the ribs. LOOKS FABULOUS. What are your comments Bruce? Also, don't mind the low quality looks of my flaps (big) and aileronsw (very long). This is masking tape and is ment only for holding together purposes. I will then cover them and the wing with high quality Monokote or some sort of thing. If ont he test flight, the maiden flight, I decide on that the ailerons/flaps are performing bad, I will change them to styrofoam- which will be lighter and more precise and edgy for better aerodynamics. I don't know, but since this is a portotype for a future final model of the airplane, I may change tons of things in the future. Although, everything looks fine right now and I will still give myself an 8 out of 10 worksmanship. What are your comments on the construction- does it look beautiful/nicely done? Thanks everyone for watching this thread, I appreciate it.

Yishht87.

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(in reply to BMatthews)
       Post #: 27

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/19/2008 12:51:02 AM   
haikt


 

Posts: 87
Joined: 7/12/2003
From: norman, OK, USA
Status: offline 		For a 13 year old you are going good. Airplane looks good to. I want to see this thing fly.
Try to take as much form experianced modelers as possible, not everything is by the book, when it comes to little tricks and know how these guys are better then any book or formula.
Your wing looks smallish for size of the plane, it will fly fine but will be fast and responsive due to small wings. when you learn how to fly it will be good plane but could be hard for training. flaps should help but sometimes they will gey you in more problems then help. I think you should not use them at first, when you get comfy with the plane you can experiment.
I think this is the best way to start in the hobbie. I did the same when I first build my RC plane, lots of reading, looking on the web ect.... crashed it the first minute it left the ground. Have build many sinse and enjoy each one .
Keep us posted

(in reply to Lafayette)
       Post #: 28

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/19/2008 10:16:53 AM   
Lafayette


 

Posts: 16
Joined: 9/10/2007
From: Geneva, , SWITZERLAND
Status: offline 		Thanks, and truly if you saw the wing real-life, it looks way better than any of the airplane kits out there. I was suggested by many to not bother and buy a kit, but I thought it would be much nicer and pleasurable to build it myself. I did, and god damn it's soooooo COOL. I thought about changing the fuselage to a smaller one and a less taller one- draw a new one. But I am sure with a .50 engine- I recon this is the optimum engine for my airplane- the plane will fly awesome. After all, my airplane has dimensions close to the Hangar 9 .50 P-51 Mustang PTS. With flaps, takeoff and landings will be at ease, and flight will be stable and aerobatic. What are your comments on the dimensions of my airplane- disregard the long nose- I want the nose arm to be very long for better thrust/pitch stability over my airplane. What are you thoughts on the dimensions of my airplane?

Yishht87.

(in reply to haikt)
       Post #: 29

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/19/2008 1:00:18 PM   
Lafayette


 

Posts: 16
Joined: 9/10/2007
From: Geneva, , SWITZERLAND
Status: offline 		Oh man, I cannot believe but I am redrawing my fuse design from scratch. I am making a copy of the Calmato 40 Sports fuselage, with a shorter nose and a bit bigger tail. Also the fuse will not be as tall, and have better looks as well. Nothing to show off about yet, but here are pics of what I managed to do during 45 minutes of work. I used a rather vague and crappy picture of the actual Calmato 40 Sports- I love that plane although I never flew it except Calmato 40 Trainer once with an instructor a long time ago. I think this fuselage will be rather stylish and modern- exciting for me at least. A music track which will give you an idea what this fuselage's design is this, Elvis Presley- A Little Less Conversation. I absolutely adore that guy, and I wish he wasn't stupid enough to sit on drugs and kill himself in the toilet when taking a cra*.

Yishht87.

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< Message edited by Yishht87 -- 4/19/2008 2:36:29 PM >

(in reply to BMatthews)
       Post #: 30

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/19/2008 5:26:04 PM   
Lafayette


 

Posts: 16
Joined: 9/10/2007
From: Geneva, , SWITZERLAND
Status: offline 		Here is more progress- done with side view of the fuse. Looks about 80 percent more realistic that it will fly, and about 60 percent better looking than my previous fuse version. I am now thinking of the previous fuse as an unfortunate design idea. Here is a pic.

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(in reply to Lafayette)
       Post #: 31

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/19/2008 6:41:36 PM   
haikt


 

Posts: 87
Joined: 7/12/2003
From: norman, OK, USA
Status: offline 		Looks lot better..
Long nose moment is good but could be to long and you can run into many cg issues, the new one looks lot better. make the plane as ligt as you can and you will have a good plane. I think you should be able to fly it with a good .40 if you build lite.
if it was my plane i would make it into a tail drager but that is just me, lot more easy to set up and light. dont have to run extra stuff to drive nose gear. If you go with tail drager, put your landing gear on the fuze instead of the wings, this makes it easy and stronger, less chance to damage the wing during bad landings.

(in reply to Lafayette)
       Post #: 32

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/19/2008 6:42:55 PM   
BMatthews



Posts: 9053
Joined: 10/4/2002
From: Burnaby, BC, CANADA
Status: offline 		You're going to want to put your wing back into some sort of assembly jig. Even if it's just packing strips to hold the ribs evenly and all in line. Then add the rest of the spars and leading edges and do the webbing and upper surface sheeting while it's all held down in alignment. Basically do as much as you can with the wing held down so it all is held firmly in alignment. Really we should not be seeing pictures of the wing and control surfaces at this stage where it is not still held down in the assembly jig setup.

However on the whole you're doing an excellent job. Some would say that you over designed it and compared to some designs yes you have. However I see a lot of attention to supporting the sheeting and covering and a solid approach to spar design. Your method IS using a lot of material and your choice to use plywood for the wing sheeting means that you're likely adding some extra weight. Keep an eye open for lighter ways to do things in order to control the overall weight.

Lighter always flies righter. And the new fuselage looks better for overall nose and tail lengths.

< Message edited by BMatthews -- 4/19/2008 6:44:21 PM >

_____________________________

Witty saying to be plagarized shortly.....

(in reply to Lafayette)
       Post #: 33

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/19/2008 8:45:42 PM   
Lafayette


 

Posts: 16
Joined: 9/10/2007
From: Geneva, , SWITZERLAND
Status: offline 		Thanks everyone for your attention. Bruce, my jig isn't the conventional sort of jig. I am building my wing off to fit the wing tubes, and the wing tubes are therefore my actual jigs. I tested it on other airplanes and discussed with a club member at my local club- which isn't as local since it is 40 km away . They said that is fine, and like you said "it is an excellent job" it seems to be fine. What I do is I pull through all three of my tubes and then I glue on what is left for glueing- and this way the wing keeps straight. Did not get to sinish my top view for the fuse, but by the end of this coming week I am going to be most likely done with the wing and half way through the sheeting- I am using carpenting glue for that, the kind to glue shoes together with. It is a relatively fast and at the same time allowing for corrections type of glue- I came in love with it actually. My fuse will be 7.8 cm wide and 1.01 meters long w/o rudder. It is a much smaller fuse as you notice, and I did this to compromise for my relatively small chord of my wing. An extra 40 cm of the wing difering from the fuselage length will do the job for making up for my short chord. Monday will glue the leading edge on and the upper main pine spar. Also, I have a question, but that I will ask tommorow when I have time to drawa scheme which might help you understand what I mean. Monday I am hopin for also being the day to glue on the wing trailing edge and the aileron and rudder wing firewalls. Also probably flap installation as well. Tuesday- the day for making slots and sheeting for my 2 wing servos and glueing on rest of spars and trimming the wing. Wednesday- make paper wing tube guidance tubes and start on webbing the leading edge compartment. Thursday- Start to sheet the leading edge. Friday- Finish leading edge sheeting. Saturday- go visit the hobby shop by R/C equipment for my other wing and the material for my toher wing as well. Also find some styrofoam to shange my aileron which is horribly twisted- like 3 or 4 degrees or something. Probably will change my flaps as well. Okay, my schedule is done, what do you guys think of it?

Going to watch some movie now after a heavy day of remaking and calculating my fuselage specs,
Yishht.

(in reply to BMatthews)
       Post #: 34

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/20/2008 7:02:38 PM   
Lafayette


 

Posts: 16
Joined: 9/10/2007
From: Geneva, , SWITZERLAND
Status: offline 		Okay, I workes through the whole freaking morning and a bit of the afternoon on making my fuse plans. I managed to sinish off everything including tail and top view of fuse. All that must be now done is the hardest- make each of the formers' front view- and make sure each and every clot in the formers is correct in order to get a correct fuselage that is very, very hard for me- do you know of any programs which do the formers of you desired shape for you? Like they create the slots for the spars in the correct places, fut youchose the shape of the actual formers?

That will greatly help if you gave me some programs for that,
Yishht.

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(in reply to Lafayette)
       Post #: 35

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/21/2008 7:17:55 AM   
BMatthews



Posts: 9053
Joined: 10/4/2002
From: Burnaby, BC, CANADA
Status: offline 		There is nothing that does that. The best way to do it is to draw all the formers on top of each other and aligned with the center line of the fuselage. Then you can draw in the stringers on this front view of stacked formers in a smooth manner and from that determine the notches.

But it is far more normal to not use stringers on models such as this. Instead sheeting or planking or the use of thicker balsa that is carved to shape is far more normal. Examples of how this is done can be found in magazine plans and on some of the plans from the internet. Or some people will strip plank the fuselage to form thinner compound curves. But either way it is not typical to use a lot of stringers such as what you have shown.

_____________________________

Witty saying to be plagarized shortly.....

(in reply to Lafayette)
       Post #: 36

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/21/2008 12:19:22 PM   
Lafayette


 

Posts: 16
Joined: 9/10/2007
From: Geneva, , SWITZERLAND
Status: offline 		BMatthews, you might have misunderstood, because I am not sheeting the entire fuselage, in fac only a part of it. Also, I do not think I will use as many stringers in the nose of the fuse' it will become more clear after I print the plans to-scale. Although, I do want decent sufficient strength for my airplane, as I will be doing heavy tests on the airplane and hardcore aerobatics. Tonight will get the trailing edge and most of the stringers/spars done. Pictures coming this evenin'. Thanks for your comments, the wing is turning out a beaty really.

Cheers,
Yishht.

(in reply to BMatthews)
       Post #: 37

RE: Scratch Build Project Airway XY-9 Test Aircraft - 4/22/2008 8:13:21 PM