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ex-racr's blog
21 Attachment(s) AK models Nitro models Spitfire
Discussion / Posted by ex-racr / Mar 01, 2007 @ 03:48 PM / 1,838 Views / 1 Comments / Reply
I'v had this for over a year and have just completed it, not without making a few mistakes of course! :o
I really like the look and sturdiness of the airframe and the fiberglass cowl. I used an AXI motor mount from www.smoothair.ca.
I should have weighed it first, but as I have another one, I could always weigh that.
Once again I am using SP400 stuff I had previously. A Mega 16/15/7, Castle 25 and 8 2/3 GP1100 and some 8 cell Kan 950's (last season for these).
I may go to Lipo for all my SP400 this year as prices continue to drop and the quality has increased across the board.
I also bought a Berg 4l for the receiver.
All up weight is 22 oz. which is about 1.5-2oz. heavier than others who have smaller motors and 4 oz. lipos.
Attached Thumbnails
  • Name: P2010005.jpg
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Description: Mega 16/15/7 with Smooth air Axi mount modified to fit Mega. Mega 16/15/7 with Smooth air Axi mount modified to fit Mega. 58.4 KB · Views: 185

  • Name: P2010004.jpg
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Description: With F/G cowl on. With F/G cowl on. 54.6 KB · Views: 155

  • Name: P2010003.jpg
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Description: Front view Front view 45.3 KB · Views: 125

  • Name: P2010006.jpg
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Description: Used Gorilla glue foamed a little too agressively. Used Gorilla glue foamed a little too agressively. 48.5 KB · Views: 141

  • Name: P2010007.jpg
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Description: Back end of mega showing where gorilla glue is. No damage to bearing. Back end of mega showing where gorilla glue is. No damage to bearing. 66.8 KB · Views: 133

  • Name: P2040011.jpg
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Description: German strafing run ;-) Poked a hole when setting up puchrods German strafing run ;-) Poked a hole when setting up puchrods 46.1 KB · Views: 125

  • Name: P2040012.jpg
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Description: Hole patched and ready to go. Hole patched and ready to go. 44.5 KB · Views: 147

  • Name: P2080001.jpg
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Description: At first I used the standad servo position, then moved the servo back to clear the battery. Servo is Hitec HS-81 At first I used the standad servo position, then moved the servo back to clear the battery. Servo is Hitec HS-81 54.8 KB · Views: 150

  • Name: P2080002.jpg
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Description: Finished aileron install. Vertical ply support to strengthn opening. Finished aileron install. Vertical ply support to strengthn opening. 49.5 KB · Views: 150

  • Name: P2080003.jpg
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Description: The plane comes with yellow covering on the LE at the inboard part of the wing. Definitely non-scale, so I removed it. The plane comes with yellow covering on the LE at the inboard part of the wing. Definitely non-scale, so I removed it. 55.2 KB · Views: 121

  • Name: P2090005.jpg
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Description: I did some panel lines with a silver gel pen. I found they just rub off the covering. If it survives a while, I'll re-do them after scuffing the covering and seal with a flat clear. I did some panel lines with a silver gel pen. I found they just rub off the covering. If it survives a while, I'll re-do them after scuffing the covering and seal with a flat clear. 78.9 KB · Views: 131

  • Name: P2230007.jpg
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Description: One of the stringers broke away during assembly so i opened up the covering to re-glue. One of the stringers broke away during assembly so i opened up the covering to re-glue. 33.6 KB · Views: 131

  • Name: P2230008.jpg
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Description: Put a little wood glue on another stringer precariously attached (shiny spot). Put a little wood glue on another stringer precariously attached (shiny spot). 51.7 KB · Views: 141

  • Name: P2230009.jpg
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Description: Here's how it looks with the covering removed. Here's how it looks with the covering removed. 56.0 KB · Views: 138

  • Name: P2230010.jpg
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Description: Since I removed the covering, I fashioned an air deflector. aft of the wing saddle Since I removed the covering, I fashioned an air deflector. aft of the wing saddle 78.6 KB · Views: 128

  • Name: P2230011.jpg
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Description: Covered it in white so it would be less conspicuous. Covered it in white so it would be less conspicuous. 77.0 KB · Views: 117

  • Name: P2230012.jpg
Views: 139
Size: 44.5 KB
Description: You can see the holes the former. You can see the holes the former. 44.5 KB · Views: 139

  • Name: P2230013.jpg
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Size: 40.3 KB
Description: Added cross brace and for more wood to attach covering/ Added cross brace and for more wood to attach covering/ 40.3 KB · Views: 135

  • Name: P2230014.jpg
Views: 139
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Description: After two attempts I couldn't completely get rid of the wrinkles. Will re-do after I get some filghts in After two attempts I couldn't completely get rid of the wrinkles. Will re-do after I get some filghts in 35.4 KB · Views: 139

10 Attachment(s) JR Rumfal in Thunderbirds scheme
Discussion / Posted by ex-racr / Feb 09, 2007 @ 02:04 PM / 1,999 Views / 0 Comments / Reply
OK,
This was purchased about 2 years ago and I finally completed it about a month ago. It's a 7-8 cell (round cell) pattern plane with a fiberglass fuselage and a balsa sheeted foam wing. It has about 270 sq. inches of wing area and weighs 49 oz. That's about a 26 oz. per square foot wing loading :eek: With 8 IB 3600 NiMh cells, I get about 400 watts fading to 370. So it's about 120 watts per pound. Motor is a Mega 22/20/3e spinning a Graupner CAM 11x6 folder. Definitely not a floater. I haven't flown it yet as I'm conflicted about using the NIMH cells or taking the plunge into Lipos. I made the mistake of telling the wife about Lipo fires and she hasn't forgot :( . The good news is that A123 cells (Dewalt 36V packs) offer a significant weight reduction and are safe. Either Lipos or LiFE will give an 8 oz weight loss.
I have to say, this is the second F/G fuse from the Czech replublic that I have had to fix. They put plywood disc in the fuse while it's being molded and the disc is never parallel to the nose. I had to grind it out and put in a new fire wall. THe other thing that really annoyed me about the plane is that the chord of the wing was longer than the canopy opening for it. I had to grind out the canopy opening and now it looks like :censored:
I decided to leave it as it is as this is one plane that you could spend hours on trying to get it look perfect and right now it's good enough to fly.
I decided to have a split "Y" elevator linkage and it was a pain but it will work better than the "U" shaped wire that came with it. Kudos to Foss1997 for the idea he used in his Rumfal. He made the mistake of relying just on the glue. I used a mechanical connection as well The red scallops on the vertical stablizer could be done better and I will re-do it once it has flown a few times. The Testors dark blue paint isn't a cloase match to the insignia blue covering I used, so painting will be done later.
Attached Thumbnails
  • Name: PB170014.jpg
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Description: 5/16 aluminum tube with Dave Brown end caps. Would just use wood dowel next time 5/16 aluminum tube with Dave Brown end caps. Would just use wood dowel next time 89.0 KB · Views: 211

  • Name: PB170015.jpg
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Description: Couldn't bend the wires to get symmetry, but it gives equal deflection to each elevator half. An easier way would have been to have them exit further up the fuselage Couldn't bend the wires to get symmetry, but it gives equal deflection to each elevator half. An easier way would have been to have them exit further up the fuselage 46.7 KB · Views: 140

  • Name: PB170017.jpg
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Description: Used a grommet to prevent antenna fraying Used a grommet to prevent antenna fraying 31.6 KB · Views: 140

  • Name: PB170018.jpg
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Description: Antenna mounting Antenna mounting 41.8 KB · Views: 145

  • Name: PB170019.jpg
Views: 152
Size: 49.5 KB
Description: View of servos and receiver. Receiver will be moved in front of servos before maiden. View of servos and receiver. Receiver will be moved in front of servos before maiden. 49.5 KB · Views: 152

  • Name: PB170020.jpg
Views: 153
Size: 49.9 KB
Description: I used a heavy dute tie wrap that came with one of my child's toys to pull though servo wire. I worked quite well. I used a heavy dute tie wrap that came with one of my child's toys to pull though servo wire. I worked quite well. 49.9 KB · Views: 153

  • Name: PB170021.jpg
Views: 195
Size: 47.5 KB
Description: Front view. You can see a gap between the canopy and the wing. Will get fixed if it survives a few flights Front view. You can see a gap between the canopy and the wing. Will get fixed if it survives a few flights 47.5 KB · Views: 195

  • Name: PB170022.jpg
Views: 153
Size: 63.6 KB
Description: Rear view Rear view 63.6 KB · Views: 153

  • Name: PB170023.jpg
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Description: Top side of airplane Top side of airplane 39.2 KB · Views: 172

  • Name: PB170026.jpg
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Description: Underside of Airplane Underside of Airplane 44.3 KB · Views: 165

On board video
Discussion / Posted by ex-racr / Feb 09, 2007 @ 12:54 PM / 1,906 Views / 0 Comments / Reply
I even have on board video of one of the flights of it as well. I had the camera mounted on it's side and had to rotate the image. I'll do much better next time:
http://www.rcgroups.com/forums/showthread.php?t=567674
I just received an E-FLite six series 2000kv motor and F-27C mount. I'll be putting that on in the coming days. As cold as it's been, I doubt it will see any air time soon.

Terry
1 Attachment(s) F-27 Stryker with custom paint
Discussion / Posted by ex-racr / Feb 09, 2007 @ 12:48 PM / 2,937 Views / 3 Comments / Reply
Well, I've been on RC groups for quite some time but have not posted pics or a build thread, so I think I'll start trying to become a little more active and share with others what I've been doing. Last year I decided to get another flying wing to replace the FMA razor I foolishly sold. The flying wings greatest attraction to me is that you can't really hurt them, which makes it a perfect plane to warm up on or try new things with.
The downside is that without a ruder, aerobatics are more limited. However, I'm going to upgrade it to brushless and maybe start using lipos with it in the spring. I may just keep the NIMH in it and pump up the watts a little more.
I painted it with Testors enamel paints trying to make it look reminisent of the Thunderbirds scheme. It was also a test of the paint and the colors for another airplane. The Testors did not attack the foam at all. Even though I really didn't bother to do a "perfect" job on it, the more i look at it, the more the chrome paint on it impresses me. So much so that the next one will probably chrome paint also. Here is a picture in good sunlight:
Attached Thumbnails
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Description: 106.8 KB · Views: 525

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