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Ziroli 1/6 Hellcat Build

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Old 04-15-2018, 10:39 AM
  #201  
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Originally Posted by show871 View Post
Those rails are great have you seen the linear style servos to actuate it???? I may try them on mine if I ever get to it!
I hadn't but based on your comment, took a look. From what I can find, don't know how I would adapt what I've already put in. One thing, I'd want the linear servos mounted forward of the sliding canopy, for CG purposes, not behind the cockpit - useful balance weight.

Looking at the Actuonix T-16 models, maybe there would be a way to secure the servo to the front edge of the sliding canopy, above the rails I installed? But the servo arms would be visible, not hidden like the P-47 example I found. The slider from Dynamic Balsa is an H- shape - if I take the outer leg of the H off, I may be able to have it slide under the fuse sheeting, say, a 4" length extending forward of the sliding canopy, forward of the dashboard, that the hidden servo would then to?

Already starting to think about dropping features in order to get the plane flying by summer/fall. Will need to decide quickly, with a solid solution, or keep moving without them.

On my Byron version, I had tried rare earth magnets to keep the canopy closed. After several flights, ended up using a screw on either side to secure it. I could take the screws out, opening the cockpit for static display. Wasn't a museum piece, but worked and still won a crowd vote award at an ad-hoc event (the museum birds weren't there that day!).
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Old 04-25-2018, 06:38 PM
  #202  
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Fuse sheeting under stab installed, both sides. First attempt at fitting the sheet under the curve of the stab and fitting the control tubes for elevator and rudder ended in scrap. However, the scrap piece was useful as a template to create the next pieces, that fit well.

Next steps will include installing the fin, installing/shaping the tail piece under the rudder, installing throttle, choke, air valve servos and air valve.

Starting to check into radios. I have a Futaba 9C with a 2.4 Ghz module - and have realized that the radio itself must be about 20 years old and that the FASST receivers I've been using are no longer available. Geez, time flies. Radio has been cared for, but what am I risking with a radio this old? And, technology has certainly changed. So, looking at the Futaba 14SGA - price looks acceptable, will run my FASST receivers and the new FASSTest receivers, plus telemetry. Good enough, I expect.

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Old 05-11-2018, 05:57 PM
  #203  
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Vertical fin installed.

Had a bit of a set back. Humidity change in Michigan, from Winter to Spring is not insignificant, and the horizontal stab was no longer parallel with the wing. Had a choice to make -
  1. tear the stab off and re-level it, perhaps even go farther in rebuild, or,
  2. leave everything as is and try to untwist it
1 would have been the best choice, the most work and I'm sure a long addition to my project. 2, well, if it didn't work, I could always go back to 1.

So, I went with 1 and so far, so good. Waited a week after performing corrective actions and stab is still parallel to wing. Calling it good enough. Lesson learned for next build.

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Old 05-25-2018, 06:51 PM
  #204  
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Tail Cone installed, sanded to shape. Hollowed it out a bit and cut holes for future - in case I go forward with light set, will have means to pass taillight wire through. Also, decided to use pegs for additional strength. They are long enough to engage the last ply former.




Outline cut, disc sanded


Pegs, hollowed out


Sanded to fuse shape
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Old 06-09-2018, 05:43 PM
  #205  
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Gun barrels from IFlyTailies arrived. Had them modified to fit 5mm high intensity LEDs. Gun light sequencer from ElectroDyanics (EDR-117MGS Machine Gun System)

Working now on throttle and choke servo location/installation.


Last edited by DaleCS; 06-09-2018 at 07:33 PM.
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Old 06-23-2018, 07:23 PM
  #206  
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Choke linkage installed. .

Original carb had a choke lever that could be reached through the front of the cowling. Original carb is no longer made - the Walbro replacement has the choke lever on the back of the carb - can't get to it through the cowling front. I didn't want to put a manual link through the cowling side. Therefore, went with a choke servo and bell crank setup. Went with the same high torque servo used elsewhere on the plane, as I'm leaving the spring/ball in place. Tried removing it, but without the ball held into the choke lever's detent, there was quite a bit of play - didn't like the idea of what vibration might do (wear, metal particles entering carb).

3rd picture shows where I expect to put the throttle and choke servos. The choke servo and fuel tank will extend below the fuselage, into the top of the wing - so the W-1 ribs will need to be notched.



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Old 07-03-2018, 08:00 PM
  #207  
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Choke and throttle servo mounted and control links/rods installed




Taking cockpit pictures of S/N 79683 at the Air Zoo in Kalamazoo, Michigan.

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Old 07-04-2018, 10:24 AM
  #208  
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Retract air valve and its servo installed. Chose the 'back of cockpit' location for the valve, for ease of installation and access for maintenance/air line replacement, if ever necessary. On the 1/5 scale, I could have mounted it forward. On the 1/6 scale, I probably could have gotten it in, forward, but it would have been very difficult to remove, install airlines or remove/reinstall the valve.

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Old 07-30-2018, 04:15 PM
  #209  
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Fuel/Air/Electric Panel, ready for installation. 2 EDR-77N Balance charge switches with room for a third. Fuel extract and fill buttons at bottom right. LED from optical kill switch and air input valve, middle right and air pressure indicator at top right. Next, mount this in fuse behind firewall.

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Old 08-27-2018, 05:14 PM
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Switch/air/fuel panel installed and remaining stringers on right side of fuse. Stopped at LHS for some offset hatch hinges but no joy - will have to hunt online: Was in Iceland recently - didn't get to meet Sturla but did meet his best friend while watching the fire works in Rekyavik - we did make contact via email and will meet him on next trip.

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Old 09-03-2018, 12:05 PM
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Sheeting the fuse - closing up! Left side stringers completed. Right side sheeted, except for access panel area - waiting on offset hinges to arrive. Will complete left side sheeting while waiting for them. using as few pieces as possible to complete the fuse sheeting - bit of a pain, but the end result is very good - I should have not filling required on the top-half of the fuse, unless I add some hangar rash.

Looking back through previous posts, see that I missed showing picture of completed throttle and choke setup - so, included picture, this time. With servo programmer hooked up, tested operation of each - they work just fine. Also decided on a new fuel tank - the old one will serve on my engine test stand.







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Old 09-29-2018, 08:44 AM
  #212  
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Still waiting on hatch hinges - going with another source - should be here next week.

Working on filling in the space between the leading edge of the vertical fin and fuselage. Plans are a bit short, here, showing something that looks like a couple pieces of 1/8" sheet balsa cut to shape and glued in front of the fin:






First block, hollowed (sanded) to fit fin.




Sanding second block to fit fuse.




Used razor planer to remove most of the excess.




After lots of sanding, starting to shape up. Will fill with epoxy/microballoons to smooth out edges.
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Old 10-19-2018, 03:51 PM
  #213  
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Fin 'flair' done. Hatch hinges are still on backorder. Starting to carve/sand out the exhaust indents behind the cowling. Shaping still isn't a strong skill for me, so taking it slow, removing what doesn't look right. Want to get one done right and I should then have a method down and the next three will go faster.



Fuse 'flair' into fin


Starting to carve/sand out exhaust detents
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Old 10-20-2018, 05:47 AM
  #214  
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Truly enjoying your build. Looks like you are quickly moving along unlike me with my Charles Kellogg TBM Avenger here on RCU under Warbirds. I painted my Avenger in RAF Fleet Air Arm color scheme. I see the photos of the RAF Hellcat, is that the scheme you are going to use. Really appreciate Chad's wisdom, advice, and his products I also used in my build. Stay well and Stay safe everyone. Patiently observing your build. Chic
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Old 10-21-2018, 08:58 AM
  #215  
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Originally Posted by redtail View Post
Truly enjoying your build. Looks like you are quickly moving along unlike me with my Charles Kellogg TBM Avenger here on RCU under Warbirds. I painted my Avenger in RAF Fleet Air Arm color scheme. I see the photos of the RAF Hellcat, is that the scheme you are going to use. Really appreciate Chad's wisdom, advice, and his products I also used in my build. Stay well and Stay safe everyone. Patiently observing your build. Chic
Hello Redtail - beautiful Avenger! Thanks for the comments (though I'm sure I'm moving slowly, but still having fun with it). Currently, I'm looking at the scheme below. This looks like a tri-color scheme, though I have another picture that shows it in single 'deep sea blue' color (my Byron was finished this way). The pictures are drawings, only - I haven't found any historical provenance to them. What I like about this scheme is that it has a story to tell. It's rare to find a US Navy fighter of this era with any personal markings (most pilots flew whatever was put on deck for them). The medium blue rudder is supposed to represent a repair - taken from an older "-3." Also, the big, offset white strips on the wings and tail are good for visibility. If not a real scheme, perhaps a mashup of a few, where the stories can be told about a few planes, rather than one.

At least that's the idea, and it seemed to generate interest from airshow guests when displaying my Byron.

I did see a "-5" in tri-color on the USS Yorktown (CV-10). Will have to think about which version of this pic I go with, this time - the white bottom would add some visual distinction up vs down.

Thanks again for your comments.


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Old 10-21-2018, 09:16 AM
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Copy That DaleCS. I like your logic for selecting your color scheme. My friend recently just finished his Hellcat. Watching him deal with the 4 individual flaps made a believer out of me. Got my eyes on ya. Chic
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Old 10-21-2018, 09:39 AM
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Exhaust cutouts are coming along, now that I have a technique that works for me. Left upper is done, with right upper about 50% completed. Both bottom cutouts are done, though I need to mount the belly pan to the fuse and finish matching the cutouts in the belly pan to those in the firewall. Should have done that back near the beginning of the project. Still not much of a carver, but "only remove what doesn't look right" is good advice.

There was quite a bit of end grain exposed in the upper cutouts, so I used the 'water putty and light spackle' mixture to smooth and seal. I could have kept sanding, but thought I had already taken out enough, didn't want to keep sanding and find out I had gone to far, making any filling/sanding job harder.




Last edited by DaleCS; 10-21-2018 at 09:43 AM. Reason: Duplicate picture and forgot some text.
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Old 10-21-2018, 11:16 AM
  #218  
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Nice
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Old 10-28-2018, 06:46 PM
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Dale,
Very nice work on the Hellcat!
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Old 12-02-2018, 03:39 PM
  #220  
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Have been working on fitting the belly pan to the rear, covered portion of the wing center section. Also, working on the front, underside of the wing center section. Once I have the front, center section underside coverer, will finish fitting the belly pan. Hinges for the switch/fuel/air access panel are still on backorder.

I'm going to create a removeable cover for the landing gear. If the gear is ever damaged or needs maintenance, I want easy access, without having to tear up the wing surface. Also, this will make threading the air lines for the gear and the servo wiring for the aileron and gun simulator LEDs much easier. Cover will be made of 3/32" thick basswood - more strength then balsa and will still curve nicely to the wing's underside shape.

For bomb pylon mounting, I'll use a blind nut under the mounting brace and solder a nut to some 4-40 threaded rod to make a 'hex bolt,' as I haven't found, yet, any 4-40 bolts/screws that are long enough for the job.

Was on the Dynamic Balsa website a couple weeks ago and did not see the 3D printed bomb pylons, there. If interested in buying a set, you may need to drop them an email.
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Old 12-16-2018, 11:45 AM
  #221  
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Left bottom center section almost done - just need to finish mounting of gear cover, complete the gear, wheel cutout and attach a bit of sheet balsa to the back half of the bomb release pylon and sand to shape of wing underside. Then, complete right side. Also, I'm going to solder a nut to the top of each 4-40 rod and then cut a slot across the top using a cut-off wheel - basically, creating a 2-1/4" 4-40 bolt.

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