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RE: The New F86D Dog Sabre - 4/23/2012 8:14 AM   
kimhey


 

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quote:

ORIGINAL: erbroens

yes, is a better solution.

however Z bends works well, but not in the way shown in the pictures.



Best regards, Enrique.




Yes I agree in general, but the links are glued to the rod at the other end. There is no way the rod itself can rotate out of it's hole in the servo arm.

Sharp eyes yoy have BTW my friend

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RE: The New F86D Dog Sabre - 4/23/2012 1:04 PM   
kimhey


 

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Status: offline 		New video....

http://www.youtube.com/watch?v=qBOM_Ct0iV8

My personal settings:

Low/high rates in mm

Elevator: 15/22 (I have only tested the high rates once, as low rates are plentyfull for scale flying) 35% expo
Aileron: 14(10down) / 20(15down) 30% expo
rudder: 20/30 no expo as I use a gyro (25% gain)
flaps: 15 takeoff / 55 landing with 12mm crow and 2mm down elevator mixed in
the
When setting up for landing, I set full flaps/crow latest at the downwind leg. The model flies perfect with this setting and the throttle at around 1/2 stick. The control feel around all axis feels positive and solid.

< Message edited by kimhey -- 4/23/2012 6:33 PM >

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RE: The New F86D Dog Sabre - 4/25/2012 7:37 PM   
essyou35


 

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Status: offline 		Has anyone calculated wing loading on this?  I am trying to get my head around how much I am looking at.
An EDF I am fllying has a wing loading of about  65 oz per ft^2.  Is that on par with this thing?  I used the whole winspan on that calculation.   I will calculate the wing loading on this once I get it done. 

Do you usually use the entire wingspan or just the wing length times two?

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RE: The New F86D Dog Sabre - 4/27/2012 4:12 PM   
essyou35


 

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Couple new questions.  Has anyone found a shortcut to make a front spare tube?  One of my wings had it drilled wrong so I had to open it up a bit to get alignment, so now I have to do the same mod to it as I did the rear spar.

Do you guys trust the vert stab mounts as given?  A expert builder I know questioned it with such short spars coming out of it.  I was going to put a CF tube inside the CF tube spars it has to lengthen them, and glue in some wood for them to mount into.  As given, it just relies on hysol to hold it on,  is that ok?



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RE: The New F86D Dog Sabre - 4/27/2012 4:56 PM   
mtnflyer14



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Status: offline 		SU35, I'm not exactly sure what the problem is or what you need to do, but if the issue is mounting the large CF spar, check my post #255 and Greg's post #267 on page 11 of this thread on our use of brass tube and ply mounts to secure the brass tube to the fuselage. The CF spar fits snugly inside the brass tube. I mounted the brass tube and ply brackets with Hysol, inserted the spar and wing, got it where I wanted relative to incidence, which means the bottom of the wing was flush with the bottom of the fuselage, and then just let the Hysol set. Result was the brass tube holds the CF spar where it needs to be.
As far as the vertical stab, I built it exactly as the manual said and have had no issues with four flights.
Regards,
Gus

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RE: The New F86D Dog Sabre - 4/27/2012 5:00 PM   
essyou35


 

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Status: offline 		Gus Teh CF spar mod with brass tube went fine.  Its the front aluminum spar.  The hole in the fuse was off on one side, I had to redrill it out, so now it is sloppy.  So I basically need another tube like the brass tube to get the slop out or do you think some slop in the front is ok since I will be insalling the other guide pins?

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RE: The New F86D Dog Sabre - 4/27/2012 5:11 PM   
kimhey


 

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Status: offline 		Guys, I have 8 flights now. Both my front aluminium and rear CF spar are floating around like crazy in their oversized holes. The front/rear alignment pins and the hold-down screws, keeps the wings in place, while the alu+CF rod take care of the G-forces. It is no need to complicate things more than necessary. I have some 2-3mm clearance around both alu and CF spars.

Several non-scale (high G-turns) so far...no signs of structural weakness so far..

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RE: The New F86D Dog Sabre - 4/27/2012 5:14 PM   
essyou35


 

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Status: offline 		Thats comforting to know Kim.  Did you do anything to the vert stab or just basicallyk trust the glue?

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RE: The New F86D Dog Sabre - 4/27/2012 5:17 PM   
mtnflyer14



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Status: offline 		I think you can see the fiberglass 'sleeve' that Greg made in one of his pics on his post #267. Anyway, I wrapped the aluminum spar with wax paper and then used 3.5 oz. fiberglass and made a 'sleeve' around the aluminum spar. If you have the CF spar and alignment pins in, then I assume your incidence is correct and the wings are fairly stable when mounted. If true, then just trim the fibreglass sleeve to fit on the inside of the fuselage, and with the wing mounted and aluminum spar inserted, you can Hysol in the fiberglass sleeve. Might have to go back with a ply donut or something to better secure the fiberglass sleeve, but that should do it. I just leave my aluminum spar inserted all the time. The advantage of the sleeve is that if you are inserting and removing the aluminum spar everytime you go to the field, there are lots of wires, fuel lines, etc. to get hung up on. Won't happen with the sleeve.
Regards,
Gus

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RE: The New F86D Dog Sabre - 4/27/2012 5:28 PM   
essyou35


 

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Status: offline 		I seen the sleeve just wondered if there was a shortcut found like a cardboard tube or another brass tube or something.  Just trying to take a shortcut. 

I'll probably take a shortcut here and just glue in a piece of wood to hold teh spare down in the hole.  it pushed all the way to the bottom so just need it to be help there. 



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RE: The New F86D Dog Sabre - 4/27/2012 6:55 PM   
kimhey


 

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quote:

ORIGINAL: essyou35

Thats comforting to know Kim.  Did you do anything to the vert stab or just basicallyk trust the glue?


Essyou35, the two blue plastic tubes in each stab halves were poorly glued, so I just ripped them out and threw them in the bin..

The strenght is in the built up structure, so the plastic tube was more a guide than anything else.

When I glued on the stabs, I filled the holes with plenty of 30min epoxy, using a thin bamboo skew to get the epoxy all in there. Remember to grind off all the paint on the fuselage where the stabs mount. Some preparation of the stab´s glue side was also done. When both stabs were glued on, I held them in place with masking tape. Then I stuck my hand through the fuselage end(....), and rotated the CF rods with my fingers, just to be sure the epoxy was evenly spread.

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RE: The New F86D Dog Sabre - 4/27/2012 7:05 PM   
essyou35


 

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Status: offline 		Kim was asking about vert stab

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RE: The New F86D Dog Sabre - 4/27/2012 7:53 PM   
kimhey


 

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Status: offline 		Ohh

Too many beers I guess... ( nine o´clock in the evening in Norway now)

Vertical stab it is then; I just glued it in with 30min epoxy, after removing paint from the fuselage and drilling several 3mm holes in the v-stab´s base. I did however use some time thinking whether it would be strong enough or not, before I just went for the method described in the manual..

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RE: The New F86D Dog Sabre - 4/27/2012 8:04 PM   
essyou35


 

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Status: offline 		Thats what I did too but will use hysol.  I am also going to re-enforce mine,it will make my local adviser happy.

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RE: The New F86D Dog Sabre - 4/28/2012 1:13 AM   
jetflyr


 

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quote:

ORIGINAL: essyou35

Thats what I did too but will use hysol.  I am also going to re-enforce mine,it will make my local adviser happy.


And more tail weight, and more complex....
Please consider BVM's Bandits, and others ..... the fin is held on with a single rod and set-screw.

... don't complicate things any more than you need to, it works fine as designed, for what it is: a war-bird. If you plan on super high energy snaps and so-on ... all bets are off.

Greg


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RE: The New F86D Dog Sabre - 4/28/2012 1:58 AM   
essyou35


 

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Ok, will trust the hysol to hold the tail on. 

I have some HET edfs and they rely oon glue instead of structure, usually I try to fix that.  But I'll trust your advice.

If the tail comes off in flight I can blame you!  Just kidding.



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RE: The New F86D Dog Sabre - 4/28/2012 4:27 PM   
essyou35


 

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Status: offline 		Can someone have a loot at my horizontal stabs and just help me by telling these look ok.  Eyebalilng pics in this thread mine look to be off but its hard to tell.  First two are left stab, 2nd two are front .  The front of the stabs are below the molding

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RE: The New F86D Dog Sabre - 4/28/2012 4:45 PM   
TimWatson


 

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quote:

ORIGINAL: essyou35

Can someone have a loot at my horizontal stabs and just help me by telling these look ok.  Eyebalilng pics in this thread mine look to be off but its hard to tell.  First two are left stab, 2nd two are front .  The front of the stabs are below the molding


Why is there such a big 'gap' from the leading edge of the stab on the moulding on the fuz and the leading edge of the actual fuz. Is this how the model comes from the factory or are yours not forward enough. It looks like the horizontal stabs you have are not to fit the fuz you have ?




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RE: The New F86D Dog Sabre - 4/28/2012 5:30 PM   
mtnflyer14



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Status: offline 		SU35,
My tail section is taped up for painting so can't take a pic right now, but my horizontal stabs do not look like that. They are more forward (1/2 to 3/4 inch) and more closely fit the contour of the fuselage. Will take pics in a couple days if no one else posts them sooner.
Regards,
Gus

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RE: The New F86D Dog Sabre - 4/28/2012 5:32 PM   
erbroens



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Yes I agree in general, but the links are glued to the rod at the other end. There is no way the rod itself can rotate out of it's hole in the servo arm.

Sharp eyes yoy have BTW my friend


Thanks, glad you remembered to find a way to avoid the rotation of the pushrod. I hate to be a nit picker but If I may help someone to avoid a potential dangerous situation I usually point it.


Best regards, Enrique.

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RE: The New F86D Dog Sabre - 4/28/2012 6:37 PM   
jetflyr


 

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ORIGINAL: essyou35

Can someone have a loot at my horizontal stabs and just help me by telling these look ok.  Eyebalilng pics in this thread mine look to be off but its hard to tell.  First two are left stab, 2nd two are front .  The front of the stabs are below the molding


Those look very close to where mine are.
Greg

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RE: The New F86D Dog Sabre - 4/28/2012 7:06 PM   
essyou35


 

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Thanks Greg.  If anyone is willing, can you post some pics of how your stabs mounted and I'll decide if I am going to change it or not.  If I recall, the stabs are suppose to be 0 incidnce to ... fuse?  Not even sure how to measure that, where is 0 at?



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RE: The New F86D Dog Sabre - 4/28/2012 8:43 PM   
jetflyr


 

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ORIGINAL: essyou35

Thanks Greg.  If anyone is willing, can you post some pics of how your stabs mounted and I'll decide if I am going to change it or not.  If I recall, the stabs are suppose to be 0 incidnce to ... fuse?  Not even sure how to measure that, where is 0 at?




Please re-read my post # 690.
Greg

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RE: The New F86D Dog Sabre - 4/28/2012 9:45 PM   
sidgates



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Status: offline 		essu35,
I am not building the F-86D but read this post with interest. When I compare your picture here to the second picture in Post 644 it appears you have the horizontal stab mounted about 1/2" to 3/4" further back than post 644.

In your picture there is one hole in the fuse fairing showing and part of another hole. These do not show in post 644.

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RE: The New F86D Dog Sabre - 4/29/2012 7:15 AM   
TimWatson


 

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Status: offline 		In post 644 I agree there is no hole showing but the front of the stab is at the panel line which is the same position as in the post above so it looks like you have yours in the same position. What is the hole in yours all about ?

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