RCU Forums
MiG-21PF at Pima air Museum
MiG-21PF at Pima air Museum
0 2021/06/15 19:03:17
J-6 at Pima Air Museum
J-6 at Pima Air Museum
0 2021/06/15 19:06:23
J-6 MLG. It is a trailing link strut arrangement, but there is no pullrod (ahead of the strut) to cause a shrink action while retracting.
J-6 MLG. It is a trailing link strut arrangement, but there is no pullrod (ahead of the strut) to cause a shrink action while retracting.
0 2021/06/15 19:07:08
Screenshot of the Htail assembly.
Screenshot of the Htail assembly.
0 2021/06/16 16:24:58
Vac bagging the Htail skins. Initially I tried using the method shown with yellow "dum-dum" tape sealant and single layer vacuum plastic sheet, but I could not keep good vacuum. After making the first 6-7 parts, I switched to using full bags going around the entire mold. Much easier to seal.
Vac bagging the Htail skins. Initially I tried using the method shown with yellow "dum-dum" tape sealant and single layer vacuum plastic sheet, but I could not keep good vacuum. After making the first 6-7 parts, I switched to using full bags going around the entire mold. Much easier to seal.
0 2021/06/16 16:27:16
Trial fitting internal structure onto laid up and trimmed skins. You can see the first 2/3 of the skin with CF cloth... The part yielded a pretty stiff part in the end. I think I can remove some weight in future layups.
Trial fitting internal structure onto laid up and trimmed skins. You can see the first 2/3 of the skin with CF cloth... The part yielded a pretty stiff part in the end. I think I can remove some weight in future layups.
0 2021/06/16 16:31:34
Parts eventually primed, then thrown onto the parts rack - move onto the next subassembly. More laser cut structure in waiting...
Parts eventually primed, then thrown onto the parts rack - move onto the next subassembly. More laser cut structure in waiting...
0 2021/06/16 16:35:37
Vac bag time. Looks like I switched to using the full bag method. Much easier to maintain a vacuum. For me, any way...
Vac bag time. Looks like I switched to using the full bag method. Much easier to maintain a vacuum. For me, any way...
0 2021/06/16 16:47:31
Structure, servo, and wires for lighting routed. I assumed lighting would be icing on the cake, but could likely be added after the model has flown. so for now, it's a detail...
Structure, servo, and wires for lighting routed. I assumed lighting would be icing on the cake, but could likely be added after the model has flown. so for now, it's a detail...
0 2021/06/16 16:49:45
Everything closed up in the Vfin mold. This pic is dedicated to B-1 Bob. :-D
Everything closed up in the Vfin mold. This pic is dedicated to B-1 Bob. :-D
0 2021/06/16 16:53:01
When I laid up the LH Vfin skin, I added a servo cover in the mold. When the skin is laid up and bagged, you'll be left with a skin that has a pocket for a servo cover. So that's what I have here. Also followed same process to lay up the rudder, with separate molds.
When I laid up the LH Vfin skin, I added a servo cover in the mold. When the skin is laid up and bagged, you'll be left with a skin that has a pocket for a servo cover. So that's what I have here. Also followed same process to lay up the rudder, with separate molds.
0 2021/06/16 16:56:31
Added G-10 plates to hold a piano wire hinge, got some primer on the parts, and almost ready to throw onto the parts rack. Except after running the (approximate) loads numbers, I decided to go to a higher torque servo, and decided to run everything at 7.4 volts. So we're doing a servo swap here. I decided to settle on Savox servos for just about everything in the model.
Added G-10 plates to hold a piano wire hinge, got some primer on the parts, and almost ready to throw onto the parts rack. Except after running the (approximate) loads numbers, I decided to go to a higher torque servo, and decided to run everything at 7.4 volts. So we're doing a servo swap here. I decided to settle on Savox servos for just about everything in the model.
0 2021/06/16 17:00:22
Showing pull-pull (or push-push) arrangement for the rudder/servo...
Showing pull-pull (or push-push) arrangement for the rudder/servo...
0 2021/06/16 17:15:40
Inlet Shock Cones being laid up in the molds.
Inlet Shock Cones being laid up in the molds.
0 2021/06/17 12:26:42
One of the fuselage skins debagged... these were long parts (relative to my not-too-indepth experience), and made for long days laying them up.
One of the fuselage skins debagged... these were long parts (relative to my not-too-indepth experience), and made for long days laying them up.
0 2021/06/17 12:27:40
One of the skins out of the mold. Green tint of the glass is the PVA needing to be washed off.
One of the skins out of the mold. Green tint of the glass is the PVA needing to be washed off.
0 2021/06/17 12:30:19
Skins being trimmed and trial fitted before going back into the molds to be seamed together.
Skins being trimmed and trial fitted before going back into the molds to be seamed together.
0 2021/06/17 12:33:24
Bagging the Inboard wing skins.
Bagging the Inboard wing skins.
0 2021/06/17 13:18:12
Plan view of the internal layout of the inboard wing. Linear actuator and Swing arm can be seen.
Plan view of the internal layout of the inboard wing. Linear actuator and Swing arm can be seen.
0 2021/06/17 13:19:08
Closer view of the Pivot Area - green teardrop shaped Upper Pivot Cover removed. There is a wing fence/pylon pretty much at the same station as the pivot point. Great...
Closer view of the Pivot Area - green teardrop shaped Upper Pivot Cover removed. There is a wing fence/pylon pretty much at the same station as the pivot point. Great...
0 2021/06/17 13:20:42
Carbon plates that hold the pin - removed. The pin is visible, along with the taper bearings (blue).
Carbon plates that hold the pin - removed. The pin is visible, along with the taper bearings (blue).
0 2021/06/17 13:22:39
Outboard wing panel (LH side), with the wing upper FG skin removed. Basic setup with a Fwd spar, and a TE closeout spar. servos accessible thru 2 lower covers. Inbd portion of this panel has 2 carbon rods, to pass the load from the Outboard wing to the Aluminum sweep arm on the Inboard wing.
Outboard wing panel (LH side), with the wing upper FG skin removed. Basic setup with a Fwd spar, and a TE closeout spar. servos accessible thru 2 lower covers. Inbd portion of this panel has 2 carbon rods, to pass the load from the Outboard wing to the Aluminum sweep arm on the Inboard wing.
0 2021/06/18 15:27:06
Outboard wing mated to the Inboard wing, with both upper wing skins removed so you can see some of the load path. The carbon rods of the Outboard wing are clamped to the Aluminum swing arm by 3 clamping screws accessed on the bottom side of the inboard wing. Wing is shown in the full swept aft position.
Outboard wing mated to the Inboard wing, with both upper wing skins removed so you can see some of the load path. The carbon rods of the Outboard wing are clamped to the Aluminum swing arm by 3 clamping screws accessed on the bottom side of the inboard wing. Wing is shown in the full swept aft position.
0 2021/06/18 15:30:47
Might be hard to decode this, but this is a cross section of the wing at the outboard slat servo. You see the servo, the servo pushrod going forward, the yellow Slat and "track" going 6 degrees down, and you can kinda see the slot created between the back side of the slat and the green wingskin. toward the right of the pic you see a cross section of the Aileron.
Might be hard to decode this, but this is a cross section of the wing at the outboard slat servo. You see the servo, the servo pushrod going forward, the yellow Slat and "track" going 6 degrees down, and you can kinda see the slot created between the back side of the slat and the green wingskin. toward the right of the pic you see a cross section of the Aileron.
0 2021/06/18 15:38:08
Flite metal time.
Flite metal time.
0 2021/06/18 16:09:38
Test fitting wing parts before primer.
Test fitting wing parts before primer.
0 2021/06/18 16:21:21
I made 2 laser cut boxes to simulate the inboard wing, and used this to help rig the carbon wingspar tubes / sockets to the fuselage, then rig to get the proper anhedral and incidence. Little silver digital angle meter seen to the right, sitting on one of the wood boxes... I also used this, mounted on my Robart incidence meter.
I made 2 laser cut boxes to simulate the inboard wing, and used this to help rig the carbon wingspar tubes / sockets to the fuselage, then rig to get the proper anhedral and incidence. Little silver digital angle meter seen to the right, sitting on one of the wood boxes... I also used this, mounted on my Robart incidence meter.
0 2021/06/18 16:23:47
A pic waay before the wing skins were bonded in place, of the Inboard wing structure, temporarily fitted to the fuselage. The fuselage wingspar sockets and corresponding bulkheads were loose at this time. Also attempting to get some motivation before wing skin attach...
A pic waay before the wing skins were bonded in place, of the Inboard wing structure, temporarily fitted to the fuselage. The fuselage wingspar sockets and corresponding bulkheads were loose at this time. Also attempting to get some motivation before wing skin attach...
0 2021/06/18 16:27:54
2020 Feb, wing carrythru structure and inbd wing structure.
2020 Feb, wing carrythru structure and inbd wing structure.
0 2021/06/19 14:09:42
Some of the parts to build a outboard fence / pylon.
Some of the parts to build a outboard fence / pylon.
0 2021/06/19 14:23:26
Outboard fence on LH wing. note the cutouts above and below the wing pivot point.
Outboard fence on LH wing. note the cutouts above and below the wing pivot point.
0 2021/06/19 14:25:14
Teardrop shaped pivot covers made and located above and below the wing pivot point. They will later be sliced into sections...
Teardrop shaped pivot covers made and located above and below the wing pivot point. They will later be sliced into sections...
0 2021/06/19 14:26:49
Then, installation of the midboard fence, which is mostly on top of the wing, and slightly wraps around the wing LE.
Then, installation of the midboard fence, which is mostly on top of the wing, and slightly wraps around the wing LE.
0 2021/06/19 14:28:38
Closeup of the Upper teardrop cover, having been sliced up, with part of the fence attached so it is now removable (slide up and down), but screwed in place for flight.
Closeup of the Upper teardrop cover, having been sliced up, with part of the fence attached so it is now removable (slide up and down), but screwed in place for flight.
0 2021/06/19 14:30:50
Pivot cover slid down in place. similar cover made for the lower side, but the lower cover also becomes part of a pylon.
Pivot cover slid down in place. similar cover made for the lower side, but the lower cover also becomes part of a pylon.
0 2021/06/19 14:32:50
Primer time.
Primer time.
0 2021/06/19 14:37:56
Quick molds made for the MLG inner liners.
Quick molds made for the MLG inner liners.
0 2021/06/19 14:39:57
Parts were laid up with the liner molds, then attached to the inside of the MLG doors. the large doors mount directly to the MLG strut, while the smaller triangular door mounts next to the lower "trailing link" portion of the strut. There is one more door that covers right where the main strut pops thru the lower wing - I'm gonna hold off on that door for a while.
Parts were laid up with the liner molds, then attached to the inside of the MLG doors. the large doors mount directly to the MLG strut, while the smaller triangular door mounts next to the lower "trailing link" portion of the strut. There is one more door that covers right where the main strut pops thru the lower wing - I'm gonna hold off on that door for a while.
0 2021/06/19 14:40:56
Once again, another plug shape was made to create the scalloped cutout in the fuselage, for clearance of the MLG tire when retracted. This was not built into the fuselage plug, because I suspected it was going to involve a lot of fitting, and tolerance buildup. Parts were laid up, then installed and faired in as shown.
Once again, another plug shape was made to create the scalloped cutout in the fuselage, for clearance of the MLG tire when retracted. This was not built into the fuselage plug, because I suspected it was going to involve a lot of fitting, and tolerance buildup. Parts were laid up, then installed and faired in as shown.
0 2021/06/19 14:44:53
Plug with parting plane. Need to add sides to make a "pool"...
Plug with parting plane. Need to add sides to make a "pool"...
0 2021/06/19 15:04:27
Advertising | Cookie Policy | Privacy Statement | Terms of Service | Manage Preferences Your Privacy Choices
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.