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Comet Hellcat by DPCM Aerowerks

Old 08-15-2017, 05:29 PM
  #1  
Griff Murphey
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Default Comet Hellcat by DPCM Aerowerks

Laser cut short kit costing a whole $15. Nice build so far I am re-engineering the empennage a bit to work with rc. It will have an Outrunner 180 and Spektrum EFLU brick. Started to built it with a straight wing but I did add the slight gull.

My building board is so original Magna Jig my mother bought for me 60 years ago. I have lost some of the original magnets but have replaced them with the spares Easy Built sells.
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Old 10-11-2017, 08:52 PM
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I don't like to try to cobble up cello canopies, so I sheeted up the canopy and will paint "clear" areas silver or blue. Also skinned a hatch over the engine, it will be retained with magnets and will give plenty of access for engine work and battery box.
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Old 11-03-2017, 05:49 AM
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Originally Posted by Griff Murphey View Post
I don't like to try to cobble up cello canopies, so I sheeted up the canopy and will paint "clear" areas silver or blue. Also skinned a hatch over the engine, it will be retained with magnets and will give plenty of access for engine work and battery box.
I did the hatch on my Taylorcaft (from Comet kit), exactly the same.
Any updates?
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Old 11-03-2017, 01:52 PM
  #4  
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I have the motor mount done, almost ready to put in the brick and start covering. Time has been really limited due to family and work commitments!
Thanks for the interest! Watched a YouTube the other day apparently when it first came out the real one sucked in not a few Japanese pilots who thought they could out vertical climb it like a Wildcat.

I am thinking of copying some tissue from a Wylam line drawing plan so I will have an authentic line drawing ready made on the underside big white tissue covered wings simulating the wheel wells and other details, as I am building it gear up as a belly lander. I have been copying decals and lozenge tissue so I think it should work.

Once they are up in the air it's academic whether you have a clear canopy or not!

Last edited by Griff Murphey; 11-03-2017 at 02:08 PM.
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Old 03-06-2018, 06:37 PM
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It's been coming slow but I just installed the guts and am ready to cover
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Old 03-06-2018, 09:24 PM
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Here are a couple of more pictures. One is the guts, then a close up of the motor mount, finally of the intermediate sea blue covering on the left side. Not too happy with my tissue it is very cheap Container Store crud, it disintegrated when wet will not tolerate stretching. I plan to airbrush over it with my intermediate sea blue to get a soft sprayed demarcation to the tri scheme.
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Old 03-07-2018, 03:34 AM
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Don Sims
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Getting there Griff. That covering looks difficult to work with.
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Old 03-07-2018, 03:39 AM
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The dark blue stuff came from Easy Built and is far superior. I am going to stick with the real stuff from here on.

I'll reshrink it with alcohol and water, let dry, then dope it with thinned clear, and it may tighten up more.
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Old 03-15-2018, 10:56 PM
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A friend found me a good three view and I had staples print my it to the right scale and I just printed my tissue for the right wing. This is exaggerated of course but will look better in the air than an expanse if white tissue. I will do both wings, the horizontal tail, and maybe some of the belly. I tack the tissue at the top edge to a carrier sheet of regular white bond paper with a thin bead of Elmerís. HP ink does not run when moistened.
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Old 03-17-2018, 05:57 AM
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Sahwheeeeet! Nice trick.
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Old 05-01-2018, 01:48 AM
  #11  
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Finushed except for a couple of hopefully minor issues yet to be fully resolved and it has made one brief hop at low altitude.


Had to do a bit of rigging on the rudder pushrod.
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Old 05-01-2018, 05:12 AM
  #12  
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Very nice, hope to some more flying reports soon. Looks like a real light, but stable bird with a great finish.
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Old 05-01-2018, 02:24 PM
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The mid blue is just airbrushed Testors fiat light blue - it ought to be a bit grayer but I was too lazy to mix a color and a stock color is nice for patching and touch ups. My copied decals are a bit light too but anyway it's a flyin' model (hopefully!)....
Thanks for your kind words!
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Old 06-15-2018, 09:42 PM
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I've been trying to post a couple of pix pf the "finished" model. Cannot seem to post any photos....

I did one low level test flight in the back yard; I have been recuperating from back surgery and have not felt much like flying but the short low level flight seemed ok.

Tried it again at 9:15 pm and after many attempts during the work day it worked, perhaps my home WiFi is better though both are ATT Uverse. Anyway success after at least half a dozen attempts!

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Old 06-15-2018, 11:33 PM
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Try reducing the photo size if you're receiving the "security token missing" message. Hopefully some day the IB folks will fix the problem. We've been hoping for a long time though.....
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Old 06-16-2018, 07:16 AM
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I like this model! Nice work and hope you are feeling better soon.
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Old 06-16-2018, 02:00 PM
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Thanks! It's been a fun build. I airbrushed in a suggestion of ailerons, and used a little silver rub'n buff - old plastic modeler weathering technique. I was going to ink in some upper surface panel lines especially in the mid blue areas but I got lazy. I appreciate your kind words. I really enjoy going back to bashing balsa after many years of being into competitive scale plastics. This is just building....and FUN! The flying is fun too, when they work, and most do... They paint a picture in the sky! It all pushes a happy button... recalls days when I was ten years or so old and would build a rubber powered Guillow or Comet in a day and a half, soaked in dope and way too heavy to fly. Even the drug stores carried Comet kits, Testors' dope, and Duco cement. Getting a bit nostalgic, please excuse me! Nowadays it takes me 9-11 months to build one...

I need a cane or Walker right now to get around and that makes it hard to carry a plane and a transmitter at the same time. Then there is walking out to recover the aircraft after it lands.

Next project is: I am trying an electric RC conversion of the little Guillow Rufe zero float. I am using the same guts E flite uses in their micro Stearman. I have always been interested in building it; the kit is their new laser cut reissue.
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Old 07-29-2018, 08:44 PM
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Maiden was disappointing.... My fault.... I forgot it needed extra rudder right trim on - it climbed to the left, engine died and she and wound up cartwheeling. Popped the upper surface tissue off the port inboard wing, but no structural damage. Robust!
My two 7.4v batteries have been abused being recharged when not fully discharged and are both high time. Gotta Buy new ones...,
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Old 10-19-2018, 10:22 PM
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Well first of all I had major back surgery in May, which has slowed down getting this plane airworthy. Hard to chase ‘em down when you are mobility impaired. I did a test flight and it started trying to roll to the left, not desireable in a 3ch no ailerons plane. I realized I had forgotten to add some right rudder which a previous grasstop series of tests had shown it needed. I also checked the basic construction over and realized the eingd had both warped, the left wing having a tiny bit of wash in and the right one having quite a bit of washout. The plane hit the ground left wing first and bounced but did not break, tho it did tear some wing root tissue. I put a lead weight on a pine lever arm 5/16” square and clipped it onto the right wingtip with a clothespin. As it’s laminated balsa it worked. I am currently waiting for this eternal rain down here in Fort Worth to end, and hopefully I can get in a test flight.

I think it’s worth remembering this is a little-changed vintage rubber power model desisign. I would recommenf adding one; perhaps two; additional spars to the wings.
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Old 10-19-2018, 11:59 PM
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Yes I can't look at the photos either. Too big. That last pic loaded OK.
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Old 10-13-2019, 04:06 AM
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Finally decided to get back with a flight test program, had two flights today. The second flight I lost control and brought it down on a sidewalk. Although the damage looks bad, itís not, it just broke all the stringers ahead if the firewall and all I need to rebuild is that. I have some extra formers and may not even have to make any. The elevator pushrod may have hung up on the elevator servoís gear as this had happened on the bench. When I rebuild the nose I will dig into the fuselage and fix that.
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Old 10-13-2019, 04:25 AM
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Here is a photo of the damage. - looks worse than it is and the motor seems ok.
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