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Larger Revolver

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Larger Revolver

Old 05-29-2010, 05:57 PM
  #826  
microdon2
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Default RE: Larger Revolver

S&S - thanks for the Monokote tips. This is the first time I've installed Robart hinges and I'm seeing that they leave more of a gap than the stock hinges that come with the Rev. Looks like the gap is a necessary evil of the hinge point. does this sound right? And with this gap I can see the need for the clear Monokote to tape it over.

btw - I'm making good progress today with my Revolver 70 build. Starting yesterday I stripped my old Rev 70 - the one I crashed in the morning - and am building the new one with all of the parts. Because I had all the "engineering" figured out already this build is going pretty fast - am hoping I can finish it tonight. Will be a new world's build record for me!

Old 05-29-2010, 07:19 PM
  #827  
bassindon2
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Default RE: Larger Revolver

If you are using the Robart Hinge Points you should have no problem with getting anice hinge line with very little gap. Not sure why you would think that you are going to have a larger gap that with the stock type of hinge.

Are you notching trailing and leading edges just a little to allow the hinge point joint to be right on the line for your control surfaces.
Old 05-29-2010, 07:34 PM
  #828  
pryor808
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Default RE: Larger Revolver

Correct! Just like counter sinking a screwhead.
Old 05-29-2010, 07:38 PM
  #829  
pryor808
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Default RE: Larger Revolver

microdon,

Take your time. Remember to measure twice and, cut once and, as soon as you know your tired, go to sleep. It will be there in the morning.

Paulie
Old 05-29-2010, 07:38 PM
  #830  
wjcalhoun
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Default RE: Larger Revolver

Mike
When installing Robarts, I like to do the following

1. MAKE SURE that the centerline of the pilot hole is at the center of thickness. Robatrs makes a nice drill guide
2. Drill the pilot square (to the hinge line in both horizontal and vertical directions). Make sure the pilots on the movable and fixes portions are exactly in alignment.
3. Counterbore the pilot hole to accept the hinge knucke. If you dont, the surface will gap quite a bit.
4. Put a little vaseline or lithium grease on the hinge pin so that glue does not freeze your hinge.
5. When you glue them (I use epoxy but others differ) make sure the hinge pivot pin is parallel to the intended hinge line. Easy way to do that is to flex the hinge 90* and make sure the free leg is vertical (square to the hinge line)
6. Glue hinges into the fixed surface first, then glue the movable portion to the hinges (already glued and hardened) in the fixed surface.

If you messed up and have too big a gap, cut them with a dremel cut off wheel, grind them off, and redrill / counterbore

Old 05-29-2010, 07:51 PM
  #831  
microdon2
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Default RE: Larger Revolver

I do have a little bit of a gap - just measured - at the widest it's 1/16th. Noticeable but not horrible. Though with the stock hinges there was no gap at all. Do I need to cut \ grind \ replace all 23 hinges (now that I'm done, of course) because of this 1/16th gap? Already planned to tape the gap with clear Monokote.
Old 05-29-2010, 08:05 PM
  #832  
wjcalhoun
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Default RE: Larger Revolver

I would not bother at 1/16. You will get better as you go along. Just seal the gaps
Old 05-29-2010, 09:31 PM
  #833  
pryor808
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Default RE: Larger Revolver

Ok! I have started. I have decided to use my Futaba 3152 Digitals instead of the Hitecs 5645's. The Hitec's are heavier and, overkill torque. The Futabas will be sufficient at 6V. Here is that engine mount I was talking about that is modified with removeable weight plates in case of adding weight to the nose.
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Old 05-29-2010, 09:43 PM
  #834  
microdon2
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Default RE: Larger Revolver


Looks like the weights on the back of a crane! Will be interested to hear how much weight you do end up needing to balance.

Are you using Robart or some other 3rd party hinges? Take my word for it - unless you're going to fly nice and easy the stock hinges won't hold forever.
Old 05-29-2010, 10:06 PM
  #835  
pryor808
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Default RE: Larger Revolver

You got me thinking microdon. Remember! the plane does call for a .61 2 stroke. I am only upgrading to a .91 stroke. The plane is going to weigh close to 9Lbs. I have had a fast airplanes (Dirty Birdies, Utter Kaos and, many others) with fiber hinges and, lasted for years. I would have used the Robarts if the plane would weigh more than 11Lbs. Fiber hinges work great and, last if installed right.
Old 05-29-2010, 10:23 PM
  #836  
microdon2
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Default RE: Larger Revolver

Maybe I didnt' install just right, but I did lose a rudder with fiber hinges while running a 91 2S. Another option is to add more hinges. Instead of the recommended three in each elevator and the rudder, install two more in each. Or pin them, though this does leave a scar (at least, how I did it).
Old 05-29-2010, 11:03 PM
  #837  
pryor808
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Default RE: Larger Revolver

Another thing that fiber hinges do not like is fuel residue. You need to make sure that any exposed hinge part incuding bare wood around the hinge is fully soaked with thin CA.
Old 05-30-2010, 12:06 AM
  #838  
pryor808
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Default RE: Larger Revolver

Aluminum mount being instaled without weights yet!
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Old 05-30-2010, 01:44 AM
  #839  
Eganwp
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Default RE: Larger Revolver


ORIGINAL: pryor808

The 30% is basically finished, I am doing the finishing touches. Running all servos wires ect! ect! I just asked Dan (you know on FG) regarding servo arm lentghts. I have the Hangar 9 1.25'' arms and, the arms hit the servo arm opening in the horizontal stabs. Either I need longer arms or reduce the travel on my trasnmitter??
Ya just reduce the throw on your radio. That's what I did. I already have the the horns on the surface out like 1.25 inches and with 1 1/4" arms I still get 50* of throws! lol. I only had to reduce them very slightly to not hit the stab cut-outs. I definately wouldn't go with longer arms, or you've just halved your servo's torque... Let me know when your finished! BTW if you're unaware the plane comes out quite tail heavy, so do what you can to keep the innards up front. MY RTF weight came in at 15.75lbs on 1485 squares w/ DLE-55 which is a floater!!! It's literally unlimited vertical at 1/2 throttle. You're gonna love it.
Old 05-30-2010, 07:21 AM
  #840  
Slow and Steady
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Default RE: Larger Revolver

Hello Everyone, My Revolver started out with a 91 FX, Bisson Pitts and it was not tail heavy. Alot of great advise regarding the robarts. I installed them after finding the glued and taped hinge line was not the same on both elevators. Having to cut out and replace the original hinges, I replaced them with some pin hinges. Ended up with a large gap from inexperience. But with taped hinge lines, the plane flies great. Incidentally, I have used CA hinges for years and only had one come loose, the rudder, after a multiple cartwheel landing. This plane may be a challenge for CA hinges, since it has a foam main wing, but no problem yet.
Old 05-30-2010, 07:28 AM
  #841  
Slow and Steady
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Default RE: Larger Revolver

In regard to the alignment of the robart hinges, I took a 1/2 by 1/2 piece of wood that was the same length as the elevator. Using my table saw, I made a groove on opposit sides of the wood, which indexed the leading and trailing edge of the wing and elevator. It also provided aligned of all hinges. I also drilled holes in the groove at the intended spacing of the hinges. This guide gave me perfect alignment of the holes and was much faster then measuring each hole separately. Hope this helps, makes the drilling easy and accurate.
Old 05-30-2010, 08:38 AM
  #842  
pryor808
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Default RE: Larger Revolver

Eganwp,

Yeah! I know about the tail heavy situation on the Peakmodel 540T. The only thing mounted inside the fuse that is aft of the CG is my Futaba R617FS reciever.
Old 05-30-2010, 09:29 AM
  #843  
pryor808
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Default RE: Larger Revolver

Ok!

The oval shape opening on the fuel tank floor was enlarged so that I can insert small planks of ply sorounding the landing gear blocks. 60 minute epoxy will do the trick.I need to head off to work now! Talk to you guys soon.
Old 05-30-2010, 03:53 PM
  #844  
bkpilot
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Default RE: Larger Revolver

Hi guys I need a little advice in my large revolver....I am building it electric using all Great Planes stuff. I need help with the grear ratio selection and prop size. I dont want a lot of speed but fast acceleration and power... Here's the equipment used....

1-Great Planes Ammo 36-88-1280 In-Runner Brushless Motor
Motor Diameter: 1.42" (36mm)
Motor Length: 3.46" (88mm)
Shaft Length: 0.197" (5mm)
RPM/V (kV): 1280/volt
Weight: 16.3oz (461g)
Input Voltage: 22.2V
Maximum Constant Current: 55A
Maximum Surge Current: 65A
Maximum Constant Watts: 1300W
No Load Current: 2.5A
2-Great Planes Gear Drive 36mm Motors
Pinion Gears: 14T, 20T
Motor Output Shaft Dimension: 5.0mm
Spur Gears: 70T, 90T
Prop Adapter Type: Collet style
Prop Adapter Shaft Dimension: 6mm - 5/16x24
Gear Ratios Included: 3.5:1, 4.5:1, 5.0:1, 6.4:1
Ratio 3.5:1 with 20T Pinion and 70T Spur
Ratio 4.5:1 with 20T Pinion and 90T Spur
Ratio 5.0:1 with 14T Pinion and 70T Spur
Ratio 6.4:1 with 14T Pinion and 90T Spur
3-Great Planes Silver Series 80A Brushless ESC High Volt
4-Battery are 25C Lipo X 2 Series 5s 3300mah

Thanks!
Old 05-30-2010, 10:47 PM
  #845  
pryor808
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Default RE: Larger Revolver

Control Horns instaled. Did not use the horns that came with it, used Dubro 493 for ailerons and, elevator. Dubro 881 Pull-Pull system for rudder. Did not use the plywood planks for strenghtning the lading gear. I did re-epoxy the gear mount blocks with 60 minute epoxy. I thought I had good Dubro HD Servo arms but, they were for Hitecs. So! I need to wait till Tuesday and, visit my LHS.
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Old 05-30-2010, 11:38 PM
  #846  
mike boxtall
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Default RE: Larger Revolver

Definitely need a larger tank. 6min run time at 3/4 throttle then she dies. Will get the 24oz dubro tank. That should help increase run time. Yes it fits. Will have to fly easy for the first five or six mins though so as I don't destroy her with. the added weight of the extra fuel.
Old 05-31-2010, 09:40 AM
  #847  
Widget
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Default RE: Larger Revolver

This is WAY off-subject by now, but I decided to go with the Reactor 58 instead of the Revolver 59 with my 91FX up front. Comparatively, I like the full-symetrical wing and slow-landing characteristics of the Reactor 58. Ailerons will be split P-51 style (shortened) and the remaining inside portion either fixed position or turned into (un-needed) flaps and the vert/horz stabs, rudder and elevator completely modified for speed instead of aerobatics. My question for the 91FX is this: 13X8 is stock, so will a 12X10 or even 12X12 Pattern prop work? I know Airraptor has some input for me on this mod anyway! Widget is ma name and Bashin' is ma game....
Old 05-31-2010, 08:54 PM
  #848  
pryor808
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Default RE: Larger Revolver



Since bashing is your style, I can see why you like a slower landing airframe.

Old 06-01-2010, 06:56 AM
  #849  
pryor808
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Default RE: Larger Revolver



Placing the 2 elevator servos in the fuse today. Plywood will be added and, cut on both sides of fuse for servo trays. The nice thing is that the fuse is wide enough for both servos to be perpendicular of each other without needing to stagger them.

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Old 06-01-2010, 08:23 AM
  #850  
Slow and Steady
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Default RE: Larger Revolver

Pryor808, Nice job on the fuselage holder in post 808. It looks like it can be tilted, which would make it alot easier to work on the near side of the plane.

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