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Ziroli Bearcat Build--Start to Finish

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Old 11-30-2005, 01:46 PM
  #76  
t_burley
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Default RE: Ziroli Bearcat Build--Start to Finish

Nice Mike! you are getting creative now with your weights
hey, whatever works. I too get my basla from Lonestar. nothing but good stuff.

I did however get one batch of 3/32" stuff that was a little rough. took care of that with the
trusty ole mouse sander.

keep on truckin[8D]
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Old 12-01-2005, 11:15 AM
  #77  
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Default RE: Ziroli Bearcat Build--Start to Finish

Got in the spirit this morning, cranking up the Navy and Air Force fight songs on the Ipod to drown out the mouse sander and balsa dust while I did a prelim sand on the wing. Here it is next to my TF Corsair wing. Even though it's roughly the same span, you can see how it kind of dwarfs the thing......
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Old 12-02-2005, 12:00 AM
  #78  
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Default RE: Ziroli Bearcat Build--Start to Finish

Nice!
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Old 12-02-2005, 10:07 AM
  #79  
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Default RE: Ziroli Bearcat Build--Start to Finish

Because one just isn't enough for anyone, the thread will now be a two-fer[X(][X(]! I threw wing #2 on the board yesterday in hopes of doing an Evan Q on it, and framing it up in a couple days to get it to the same spot as #1. Of course got hung up by having to make new partial ribs for W7, W5 and new cuts in W6R to mount the Robinaire units for John so they won't be hanging out in the breeze when retracted, but by the weekend, should have a second wing pretty well done up.

I can give a heads up about cutting out the flaps and ailerons from the wing. I found it tough to cut them with the razor saw on one aileron, so I went with the Dremel cutoff wheel on the flap and got a cleaner cut that's easier to sand. You've got to cut through a few ply ribs for the flaps, so the Dremel keeps things in better order. On the second wing, I'm going to do some pre-cutting of the cutoff slots a little further so they won't be as difficult to get off there after sheeting. I can tell though, that the second wing will be even faster than the first as I can rifle through the sequence without having to look at the order and setup of things now, and know what to do with W1 now regarding angle for dihedryl, etc.. Also the, arrangement of the trailing edge makes good sense now after doing one.

Toss up in quality between PCK and Aeroplane works kits, but the PCK gets the nod for including a bit more complete selection of labeled parts and pre-cut items not in the cutting templates. Having the PCK kit on hand will be good to use these few parts as a template to cut some of the smaller items on #1, like sub-leading edge sheet, etc.. There aren't extensive mods to accomodate Lee's gear, but as they mount perpendicular to the Robart units, and have a greater drop-down due to the articulation and thus have shorter strut length, they are moved in one bay and the ribs will have to be backed up and doubled to support as well as having the rails installed further up into the ribs. I can't see how this could be done once it's built without extensive mods or damage, so good to have those up front.

J.M. where you been pal? Need answers to the tailwheel question and supply issue to keep on movin' on the fuse as the tailwheel goes in there right with the first stringers, or at least needs to have the mount built for installation later. Fuse is just getting started now, but have to wait until I get info from you to go on on this part.
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Old 12-02-2005, 10:44 PM
  #80  
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Default RE: Ziroli Bearcat Build--Start to Finish

So here's some of the rib mods necessary for the Robinaire gear. The template on the drawing is generous, but not quite inclusive of all the removal necessary to fit the gear. Here's the more accurate shot of what looks like is going to be right to get the gear in.

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Old 12-02-2005, 10:47 PM
  #81  
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Default RE: Ziroli Bearcat Build--Start to Finish

Because of the articulation, the gear sits inboard one bay so W5 will have be doubled and reinforced....here's how it looks on the wing..

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Old 12-02-2005, 10:50 PM
  #82  
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Default RE: Ziroli Bearcat Build--Start to Finish

And lastly, a shot of the incomplete aileron on #1...

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Old 12-02-2005, 10:57 PM
  #83  
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Default RE: Ziroli Bearcat Build--Start to Finish

looking good there Mike!
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Old 12-02-2005, 11:51 PM
  #84  
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Default RE: Ziroli Bearcat Build--Start to Finish

Hey Mike, Got the fuse going. Here;s a few photos. Need to know the tail wheel set up and we'll be in good shape. It coming together pretty quickly.
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Old 12-02-2005, 11:53 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

In the mean time I've been putting together the "show room"
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Old 12-03-2005, 12:02 AM
  #86  
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Default RE: Ziroli Bearcat Build--Start to Finish

Hey Mike,

I would have to say your looking GOOD,
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Old 12-03-2005, 01:26 AM
  #87  
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Default RE: Ziroli Bearcat Build--Start to Finish

Guys,Tailwheel will be the robart 160 retractable. Pretty sure I've got one at home that I'll send out when I get back next week. If not,I'll just order another from Robart. Looking good. You guys are moving real fast. Do you fellas ever make it down to the Joe Nall?
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Old 12-03-2005, 02:23 AM
  #88  
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Default RE: Ziroli Bearcat Build--Start to Finish

You guys wanting to know how to install the Robart retratable tailwheel (160WC) into the Bearcat... I have a Ziroli Bearcat that I am building right now and documenting on my website http://www.chuckswim.com/sac/index.html
I have pretty well documented the installation of the Robart gear in mine. It is also removable after the airplane is finished so you can always get to the cylinder if you should get a leak. Take a look and let me know if you guys have a better way.

http://www.chuckswim.com/sac/index.html
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Old 12-03-2005, 07:50 AM
  #89  
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Default RE: Ziroli Bearcat Build--Start to Finish

Ah yes, the big round fuselage cigar begins to take shape.....and the showroom looks good too Chuck .

Ch03ppr Chuck, Thanks a bunch for the link. That's exactly what's needed at this stage. Your shots give a good description of it. Your build looks great.

Jim, glad it's the 160WC as that's a pretty easy one to get if there's any trouble. Also, Robart has the dimensions on their site, or if not, I've got them here on my Corsair plans, so we might be able to set up the mount without actually having it. But it would make things a whole lot easier if she went into the fuse in the manner Ch03ppr shows in his link.
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Old 12-04-2005, 05:43 PM
  #90  
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Default RE: Ziroli Bearcat Build--Start to Finish

hey chuck got a few questions about your bearcat build nice website very informative on building the fuse when do we get to the fuse sheeting part am also building the bearcat desiding if i really want to build the zeroli fuse or go with the american eagle fuse you are really getting me to swing towards the zeroli build fuse let me know

Dave
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Old 12-04-2005, 06:17 PM
  #91  
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Default RE: Ziroli Bearcat Build--Start to Finish

I have been working on the fuselage sheeting today. So far the build up of the fuselage has been very enjoyable. I am finding the sheeting part difficult though. I am trying to sheet too large of a piece at a time I think. I am going to break it down into smaller parts and see if that does not make things go easier. I should have photos up in the next few days assuming that I make some headway today and tomorrow with the sheeting. My sheets are glued and soaked in amonia/water and are taped into place drying on the fuse right now. After that dries I will then glue that sheet onto the fuse. We will see. And thanks for the kind words. I am trying to create a how-to on the Bearcat to show people that it's not a very difficult airplane to build.
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Old 12-04-2005, 08:35 PM
  #92  
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Default RE: Ziroli Bearcat Build--Start to Finish

Here are a few shots of my fuse plug i sheeted from the crutch up after sheeting the top section i removed from crutch supports then completed bottom .If you will sheet entire top of fuse from crutch up it will not twist hope these photoes help
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Old 12-04-2005, 08:50 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

Hey thanks for supporting the thread with the different techniques and methods gents.[sm=thumbup.gif]. We should be able to get this thing to be sort of a "one stop shop" for the build on this plane by the time we're through here. No progress today as a result of having to watch the Bears take it to the Pack for the first time in recent memory for me.....that's priceless for a Bears fan.
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Old 12-04-2005, 09:26 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

A couple pics. of the enlarged fuse plug ready for mold making
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Old 12-04-2005, 11:47 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

Here's a shot of the retract rail install for the Robinaire gear. The rails go through W6 which is reassuring as it will provide a ton more support. W6 is left out on the Robart install, and added here to give the rail one more rib to mount to. I was a little suspect about how the strength might be, but now that I see it in 3D, I'm reassured that it will be a good setup. Still to cut W5 to fit on the inside of the rails. I'll probably just epoxy the ribs to the rails with the gear mounted on them to insure proper alignment and a drop in install on the gear. The shot from below shows how easy it will be to take the gear out if needed. Going to need a little covering hatch for the removed area below the retract mechanism, but should be a great setup. Probably take me longer to set up the gear rails than to build the whole rest of the wing...
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Old 12-05-2005, 08:11 AM
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Default RE: Ziroli Bearcat Build--Start to Finish

Wulf how long is the strut when fully extented ? My enlarged cat requires 13 inch long strut from pivot point to axle . Would like to find a scale gear that will fit .
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Old 12-05-2005, 04:48 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

I had Gene Barton make a set for my Bearcat. They are 15" from pivot to axle and thus far are working fine.
What are you using for power and how is your center section constructed? Mine currently has a composite center section but I believe that it could be made stronger and lighter from wood.
ORIGINAL: moldmaker

Wulf how long is the strut when fully extented ? My enlarged cat requires 13 inch long strut from pivot point to axle . Would like to find a scale gear that will fit .
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Old 12-05-2005, 06:05 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

Extratorker and JohnVH could best tell you of the power choices for the two birds as we've only talked about the possibilities and what's best, but I think you guys are both right on with the 100's and choices we've talked about.

I can concur with the articulated gear leg length I think. I've not measured the leg, but it seems both really short when retracted and pretty long when it's extended. It's really a cool working setup and the gear look up to the task to me for sure. It's not a retrofit sort of thing though without some major cutting, so be sure to consider this when ordering and setting up the gear.

Gremlin, the wing seems incredibly strong to me and I just reinforced the center section as I've discussed above. I was really impressed with the thing actually, and the wing doesn't impress me as heavy at all.

I'll get back to work on both the wings tonight and get some more pics up....have to keep the thread above the fold of page 2
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Old 12-05-2005, 06:39 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

Ive thought about using a zenoah GT80 cause they are cheap, but my #1 choice would be a DA100, Im told it wont fit in the cowl, maybe a bme110...

Ill be getting scale exhaust made for the bird from Kelo too.
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Old 12-05-2005, 06:56 PM
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Default RE: Ziroli Bearcat Build--Start to Finish

John, EXCELLENT call on the Keleo. It will work awesome on this plane. I've seen the Mustang exhaust and it's really great. Reasonably priced for the stuff too, especially when considering the cost of other options. GT80's a good motor, saving the dough and getting the cool exhaust gets a thumbs up from me.[sm=thumbup.gif]
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