CARF SPITFIRE ASSEMBLY and SCALE DETAILING - Page 4 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-31-2016, 07:33 AM   #31
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING


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TAIL WHEEL CONTROL SYSTEM

I opted to put in a Hitec 5087 metal gear micro servo to control the tail wheel. I will program (using a separate channel), this servo to my rudder and will then be able to have it work in the right amount for deflection when I use the rudder for steering.

http://hitecrcd.com/products/servos/...servo-/product.

The servo tray is made from items supplied by Carf for this kit. I plan to assemble the aerilons using a different holding technique, so this wooden tray was available. Again I used Hysol Locktite glue to hold it to the side of the fuselage. If I need a larger servo, the tray is easy to open up the space to slide in a bigger style of servo.

Weight for the tray was 18 grams and the servo was 22 grams.

Next to carefully attach the hatch back to the fuselage and the tail wheel project will be DONE!
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Old 05-31-2016, 11:14 AM   #32
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

TAIL WHEEL HATCH

I used Button Head Screws #2 x 3/16 inch from Micro Fasteners to hold the hatch in place. Once painted the screws will look somewhat scale for this airplane.
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Old 06-03-2016, 10:53 AM   #33
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

ELEVATOR TRIM TABS

For the Elevator Trim Tab components I purchased them from Nick Ziroli.

https://ziroligiantscaleplans.com/pl...cessories.html

The MONFORTON book gives every dimension that you would need to put the trim tabs in the proper location.

These are identical to the one used on the rudder.

The weight of the Elevator before starting was 324 grams and now it is 356 grams. This incudes the self etching primer paint made for plastic.
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Old 06-04-2016, 07:01 AM   #34
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

ANTENNAE

Attaching the radio antennae to the fuselage left me with a challenge. I have seen too many war birds where the antennae has been broken off when the plane is turned upside down for assembly. I wanted to make mine EASILY removable for transportation.

I found some teardrop tubing used for struts that was just the right width. I also had an plastic insert for it that was shaped so the end would be able to pivot against the fuselage. I think this is old Byron material I had laying around.

I shaped the antennae per the dimensions in the MONFORTOM book. I added a second piece of the shaped tubing to the inside of the fuselage and place the two piece base around the tubing that is inside the fuselage. The plastic insert is glued to the antennae and the remainder of the insert is now able to be forced into the fuselage tubing.

It is a very difficult part to assemble or remove so I have NO worries that it will be lost during flight.
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Old 06-11-2016, 08:22 AM   #35
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

PITOT TUBE

As with the antennae, I wanted to make the Pitot removable from the wing to make it easier for storage.

The Pitot tube has 3 main sections, the female tube in the wing, the male attachment plug and the top part that is shaped like the Pitot tube on the real plane.

The dimensions of the Pitot tube and its location can be found in the Monforton book on page, 7.52.

Again I used Locktite Epoxy to hold the female tube to the inside of the wing.
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Old 06-13-2016, 08:35 AM   #36
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

Nice work, Brian. I love how you are making the parts removable. And they look great too.
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Old 06-15-2016, 07:25 AM   #37
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

AERILON CONTROL INSTALLATION

Well I got through my first chemo and radiation treatment and I feel great. No sickness or tiredness yet.

I'm not a fan of two things that Carf wants you to do in mounting the aerilon servos.

First I do not like the Glass Fiber control horns. I had one break on my Carf 330SC when I accidentally hit the outside horn on my elevator. I replaced it with the Hanger 9 HAN 3615 Control horn and this system has worked great for me since. On my Krill after many flights I had the hole between the two fiber horns slightly elongate from the 4-40 bolt going through. This lead to some slop. So again I replaced it with a Hanger 9 Control Horn.

BUT I did follow exactly where Carf tells you to install the horns (1 inch in sideways and 1/2 inch down). There is a supporting block there that you drill through and it gives a lot of rigidity to the control horn assembly. I drilled the hole slightly undersize then tapped the wood for a 10-32 bolt. I used Locktite epoxy to hold it in place. The Philips flat head is countersunk and I will fill it in prior to painting and it will not bee seen.

I also was not a fan of the way the servo is buried deep into the top underside of the wing. This eliminates only 1/2 of the control linkage and does hide the control arm. But it puts it at a awkward angle for precise adjustment. On watching many videos of this plane flying, you can still see the control horns and part of the linkage, so I opted to not care that servo arm, the whole linkage and control horns would be seen.

I used the EXACT same servo hatches that came from my crashed Carf Extra 330sc. They still had the metal servo holders still attached.

I cut the servo hatch with my new HOT KNIFE. What a tool. as it does such an exacting job. I just lay a flexible ruler against the outside of the line and slowly cut away. Afterwards I followed Carf's advice and added the strengtheners between the upper and lower wing skins.

I'm using Savox 2270 Brushless servos for both aerilons. The weight added for the aerilon control system (less glue and wood) was 128 grams.
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Last edited by BAMDFISHER; 06-17-2016 at 05:59 PM. Reason: Added Weight
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Old 06-15-2016, 08:14 AM   #38
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

Hi Brian, great to hear your treatment went well . Maybe I am just old school but I think fiber horns would look odd on a scale bird anyway (like mag rims on a model T ford LOL) .I think your method is a much better choice. You seem to bring a nice balance of scale/ function to your builds .
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Old 06-17-2016, 06:01 PM   #39
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

FLAP INSTALLATION

Similar to the aerilons, I went my own way. Reading several other builds on this Carf plane, it is apparent that it's very hard to get a total of 85 degrees deflection using the Carf method of completely hiding the control arm inside the wing.

I put the Flap control arm and the holding plate for the servo underneath the Oil Cooler and on the other wing under the Radiator. In this way very little is exposed of the control mechanism for the movement of the flap.

But since there is a lot of load against the flap when it is fully deployed, I added some extra support on the inside. All of this is held together with Locktite Epoxy glue. I purchased some control horns from SDS Hobbies and these were the parts that came with it. I drilled out the black nylon base to accept my own Hanger 9 10-32 bolt and clevis. The SDS bolt was only 3mm that I did not think was strong enough.

The weight for the parts for the flap system was 108 grams.
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Old 06-22-2016, 07:26 AM   #40
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Re: CARF SPITFIRE ASSEMBLY and SCALE DETAILING

REAR CANOPY

Well I have now into my second week of Chemo and Radiation and I have been fortunate in that I have had no nausea from the chemo. The radiation does tire me out a bit, but I do find enough energy to do about 2 hours of work a day on the Spitfire.

For the canopy formers I used a piece of 1/4 birch ply and shaped them to the required arc for the back support. I then used a piece of .025" styrene to cover the plywood, so it would not show any grain and look like painted steel.

There are many different pictures out there showing a variety of items used back there, but I chose the ones that came with my cockpit kit. To imitate the green zinc chromate green, I used Rustoleum's flat camouflage green paint.

For more pictures of the rear canopy visit this site for some inspiration. But remember, I am only trying to "Simulate" to interior, and am not trying to make a exact duplicate. This plane is to be used for Stand Off Scale and to have fun with, not a museum piece of work.

http://spitfiresite.com/2010/07/anat...html/07628_007
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