RCU Forums
Then some 6K carbon fiber was put into the corners. This really helps keep stress cracks from forming.
Then some 6K carbon fiber was put into the corners. This really helps keep stress cracks from forming.
0 2019/11/01 17:05:49
A paste of epoxy and cabosil is applied to the corners over the CF tow to radius the corners enough to for the glass cloth to have smooth transitions in the corners.
A paste of epoxy and cabosil is applied to the corners over the CF tow to radius the corners enough to for the glass cloth to have smooth transitions in the corners.
0 2019/11/01 17:09:59
Two layers of 3oz cloth. One side of the layup is flush with the mold flange, the other side the fiberglass comes out of the mold 3/4". When the mold halfs are clamped the excess on the one side provides the joining seam.
Two layers of 3oz cloth. One side of the layup is flush with the mold flange, the other side the fiberglass comes out of the mold 3/4". When the mold halfs are clamped the excess on the one side provides the joining seam.
0 2019/11/01 17:10:00
The molds are propped with wax and PVA, then a strand of 6K CF was placed into the corners.
The molds are propped with wax and PVA, then a strand of 6K CF was placed into the corners.
0 2019/11/02 16:30:02
Then the surface layer of 1.4oz cloth was applied the a layer of 3.7oz cloth.
Then the surface layer of 1.4oz cloth was applied the a layer of 3.7oz cloth.
0 2019/11/02 16:30:06
Then peel ply was applied followed by barrier film and breather cloth.
Then peel ply was applied followed by barrier film and breather cloth.
0 2019/11/02 16:33:44
Into a bag the molds go and vacuum pulled.
Into a bag the molds go and vacuum pulled.
0 2019/11/02 16:33:44
I also pulled the hatch out of its molds today.
I also pulled the hatch out of its molds today.
0 2019/11/02 16:39:13
0 2019/11/05 15:40:19
0 2019/11/05 15:40:19
0 2019/11/05 15:40:22
Once out of the bag, the peel ply is removed. The edges get a light scuff.
Once out of the bag, the peel ply is removed. The edges get a light scuff.
0 2019/11/05 15:41:35
Then a paste of epoxy, milled fiber and cabosil is applied to both halves and the molds are clamped together.
Then a paste of epoxy, milled fiber and cabosil is applied to both halves and the molds are clamped together.
0 2019/11/05 15:41:37
Tomorrow's task. The vacuum bag has been made, the balsa core is ready and all the fiberglass materials have been cut. Tomorrow will be a long day, it takes a total of 6 hours to make a fuselage side.
Tomorrow's task. The vacuum bag has been made, the balsa core is ready and all the fiberglass materials have been cut. Tomorrow will be a long day, it takes a total of 6 hours to make a fuselage side.
0 2019/11/05 15:45:19
The strut out of the mold and trimmed.
The strut out of the mold and trimmed.
0 2019/11/05 15:45:20
Time to apply PVA to the fuselage mold. I have had mixed results spraying PVA so I apply with a foam brush.
Time to apply PVA to the fuselage mold. I have had mixed results spraying PVA so I apply with a foam brush.
0 2019/11/06 08:56:17
PVA has been applied, I will be able to spray primer into the mold after about an hour of dry time.
PVA has been applied, I will be able to spray primer into the mold after about an hour of dry time.
0 2019/11/06 08:56:19
A light coat of Klass Kote primer applied.
A light coat of Klass Kote primer applied.
0 2019/11/06 12:50:11
First layer of surface cloth in the mold.
First layer of surface cloth in the mold.
0 2019/11/06 12:50:13
Balsa core, CF re enforcements and inner glass skin applied
Balsa core, CF re enforcements and inner glass skin applied
0 2019/11/06 12:52:33
Peel ply, barrier film and breather in the mold.
Peel ply, barrier film and breather in the mold.
0 2019/11/06 12:52:33
In the bag and under vacuum.
In the bag and under vacuum.
0 2019/11/06 12:56:34
Results of yesterday out of the bag and has the peel ply removed.
Results of yesterday out of the bag and has the peel ply removed.
0 2019/11/07 09:05:40
0 2019/11/09 12:25:27
0 2019/11/09 12:29:16
Once the servo boxes are sanded flush I moved onto installing the stab and upper wing tube sleeves. These are installed with the outter tube supports. The cores are then placed back in their shucks with a plastic sheet between the cores and shucks.
Once the servo boxes are sanded flush I moved onto installing the stab and upper wing tube sleeves. These are installed with the outter tube supports. The cores are then placed back in their shucks with a plastic sheet between the cores and shucks.
0 2019/11/17 16:10:52
Elevator servo location, dimensions taken from root and trailing edge. The boxes have an ID of 3/4"X1.5". Planned servos are MKS 69HV.
Elevator servo location, dimensions taken from root and trailing edge. The boxes have an ID of 3/4"X1.5". Planned servos are MKS 69HV.
0 2019/11/18 17:59:32
Aileron servo location. Dimensions are taken from the outer tip of the inboard wing cores and trailing edge.
Aileron servo location. Dimensions are taken from the outer tip of the inboard wing cores and trailing edge.
0 2019/11/18 17:59:32
Using the a wing fence/strut mount as a template, sand a groove into the 4 outter wing panels.
Using the a wing fence/strut mount as a template, sand a groove into the 4 outter wing panels.
0 2019/11/18 18:06:22
Make a master set of wing shucks. I had to mix and match a few inner and outer shucks until I got a set that matched. Here they have been glued together with Titebond. All wing sheeting will be done using this one pair of shucks.
Make a master set of wing shucks. I had to mix and match a few inner and outer shucks until I got a set that matched. Here they have been glued together with Titebond. All wing sheeting will be done using this one pair of shucks.
0 2019/11/18 18:06:24
The lower wing cores are then glued together with Titebond. The lower wing gets sheeted first because the shucks will need to have 3.5" cut off the root end to sheet the upper wing.
The lower wing cores are then glued together with Titebond. The lower wing gets sheeted first because the shucks will need to have 3.5" cut off the root end to sheet the upper wing.
0 2019/11/18 18:12:50
To keep the cores straight while the glue dries, Top shucks are placed on the core and weighted down.
To keep the cores straight while the glue dries, Top shucks are placed on the core and weighted down.
0 2019/11/18 18:12:51
Repeat for the upper wing.
Repeat for the upper wing.
0 2019/11/19 17:16:32
Root ribs for the upper wing panels and stabs were made today. The wing ribs are made out of medium balsa with doublers of fiberglass skinned foam. The stab roots are made from the glass skinned foam. The stab adjusters are held in place with CA and CF pins. The position of the stab adjusters and wing anti rotation pins is not critical, I just like to have them as far away from the wing/stab tubes as possible.
Root ribs for the upper wing panels and stabs were made today. The wing ribs are made out of medium balsa with doublers of fiberglass skinned foam. The stab roots are made from the glass skinned foam. The stab adjusters are held in place with CA and CF pins. The position of the stab adjusters and wing anti rotation pins is not critical, I just like to have them as far away from the wing/stab tubes as possible.
0 2019/11/20 17:05:36
Bag made from 7mil plastic
Bag made from 7mil plastic
0 2019/11/28 11:37:32
Shuck baseplate made from 1/8" MDF.
Shuck baseplate made from 1/8" MDF.
0 2019/11/28 11:40:03
Shuck baseplate attached to shucks with double sided tape. The baseplates help distribute even pressure on the cores and help keep everything straight.
Shuck baseplate attached to shucks with double sided tape. The baseplates help distribute even pressure on the cores and help keep everything straight.
0 2019/11/28 11:40:04
0 2019/11/28 11:43:53
Match the slot in the core for the wing fence/strut mount in the upper and lower wing sheeting.
Match the slot in the core for the wing fence/strut mount in the upper and lower wing sheeting.
0 2019/11/28 11:43:53
Check fit to make sure everything lines up.
Check fit to make sure everything lines up.
0 2019/11/28 11:46:19
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