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giant scale f8f bearcat Thread

Old 07-18-2009, 03:26 PM
  #1  
flyhi2005
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Default giant scale f8f bearcat Thread

tech Things
wingspan 110"-
Fuselage- 80"- FiberGlas

engine- 150 cc


























Amir
Old 07-18-2009, 08:00 PM
  #2  
Ram-bro
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Default RE: giant scale f8f bearcat Thread

oh come on, more details more info........
Old 07-18-2009, 09:24 PM
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Default RE: giant scale f8f bearcat Thread


ORIGINAL: Ram-bro

oh come on, more details more info........
Looks to be of similar size to my old Boecamp Bearcat. Da-150, 108" wingspan,70# and flies like a bat out of hell. Too Bad more people don't build the big ones.
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Old 07-19-2009, 02:43 PM
  #4  
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Default RE: giant scale f8f bearcat Thread

and the custom made Retracts by a good frind Eyal miron ,looks like the real one!!!
no air system.

[link=http://www.youtube.com/watch?v=8GYV2OS2SD0]retracts!!![/link]

and the orginal
[link=http://www.youtube.com/watch?v=MZitkTiXfbE]orginal retracts[/link]

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Old 07-19-2009, 06:52 PM
  #5  
Gremlin Castle
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Default RE: giant scale f8f bearcat Thread


ORIGINAL: flyhi2005

and the custom made Retracts by a good frind Eyal miron ,looks like the real one!!!
no air system.

[link=http://www.youtube.com/watch?v=8GYV2OS2SD0]retracts!!![/link]

and the orginal
[link=http://www.youtube.com/watch?v=MZitkTiXfbE]orginal retracts[/link]

Nice looking design for the gear. You might want to consider heavier axles and wheel hubs for an airplane this size. I started out with 1/4" music wire and immediately found that I needed 5/16 heat treated axles and aluminum hubs to stand up under repeated landings.
Good luck on your project.
Old 07-20-2009, 04:51 AM
  #6  
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Default RE: giant scale f8f bearcat Thread


Hi Guys,

Well i will be watching this thread closely! Amir, where did you get the glass fuz from? is it a kit or have you designed and took the mould? i take it the wings are just a foam core, what kind of stenghening are you going to do to it?

So many questions eh?

I have scaled up the Nick Ziroli Bearcat plan up to 102" i have modified Centry Jet retracts for it, havent started yet, so this my give me insperation!!

Keep up the good work and keep the post going...


Di n Dave...
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Old 07-20-2009, 07:07 AM
  #7  
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Default RE: giant scale f8f bearcat Thread

hi pitss
the fuz made by a frind 'specialist in fiberglass fuz 'its made by a plan off clivland models

the wing have foam core and coverd with veneer,and the veneer coverd with fiberglas 45 gr/m

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Old 07-20-2009, 05:25 PM
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Default RE: giant scale f8f bearcat Thread



Looking good Amir,

Your friend looks like he knows how to make nice mouldings!, how are you going to do the canopy? i was going to use a 3w canopy but ive not been succesfull in getting one!

What all up weight do you think it will be?

All the best,
Di n Dave...

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Old 07-20-2009, 06:23 PM
  #9  
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Default RE: giant scale f8f bearcat Thread

hi dave

the weight Should be 18-20 kg

about the canopi
you have no idea ,how to do the canopi
perhaps like this: [link=http://www.flyhi.org.il/vacrondelba.htm]http://www.flyhi.org.il/vacrondelba.htm[/link]
its in Hebrew ,but you can understand from the pics, how to do , home made vacuum forming.
use with vacuum cleaner.



here is Translation by Google for the Article:


Description The principle of the method.

Method Name: Design Bwakom - "Vacuum Forming"

Boards Flsteim common method used: According to - V - DC PVC (transparent), polystyrene - Polystyrene, I - me - ace - ABS, polycarbonate - Polycarbonate. All materials belong to this family of materials Htrmoflsteim. I mean, can be processed by heating cause material softening. After cooling, the material and receive the new form. Most commonly used materials in the form of panels or curtain, in commercial plastic sheet, Perspex, etc.. PVC sheet minutes too common materials, art supply stores, and graphics (slides thick).

The method is based, if so, by heating plastic sheet, Mtihth on the model in the shape of the part requested Oshaibt air curtain between the model. Shaibt air causes a sub - Click relationship between pressure atmosphere outside the facility and hanging model. In this situation, suspended curtain now received the form of model for a while, cooling the material. The next step is to extract a sample part is requested, cutting remaining plastic flying model and adjusting the model.

Sounds complicated? Actually a simple process and can be performed in domestic conditions as stated.



Means necessary.



Wakom box.

A box of wood or plywood on all sides אטומה pierced at the top. (Illustration 1)

Frame tent.

Wood frame or plywood and inner teachability appropriate outside of the wooden box with a space of 1-2 mm. (Illustration 1)

To create a source of sub - click.

Domestic vacuum cleaner. As Shsoab stronger, you can produce larger parts of a greater material thickness.

Model section.

You can design the model by filing with instrument carving block it or sapling, or copying by the plaster cast in the original part.

Plastic sheet material.

Thickness and type of material will be chosen based on requirements of section strength vacuum cleaner.

Source of heating.

Electric furnace for home heating sheet.


Getting production. (Illustration 1-2)



Create a box of wood or plywood thickness 10-15 mm on - according to the desired size (in accordance with section Lmimdi Hsoab and limitations.) Height box will be about - more than 50 mm diameter pipe vacuum cleaner. Dfnot the box has a well-paste with plastic glue. There burn the surface of each box the upper surface Kdhim diameter of 2 mm Ovmroohim of about - 10 mm. After creating a box around Huakom have to paste the surface Hmnokb seal (you can use caulking used to seal doors and windows. Mdfnot one box has a drill with drill - come in a glass pipe opened vacuum cleaner. It is important that the sealing instead, because "Briht Wakom" will prevent this from היווצרות Sub-click on the sheet provides a model to attract.

The tent has a frame to produce salty thick wood or plywood of 10-15 mm internal Cshachlko cut to create a framework Shlomo (Illustration 1). Have to adjust your frame to match Lmimdi and inner box + 1-2 mm space.


Pipe water drawer


Kdhim 2 mm diameter of 10 mm Bmroohim

Kidoh and align pipe vacuum cleaner

Gasket glued the edges of the box

3

Manufacturing:



1. The authors hoover box (do not run it yet and not to forget friend electricity). Placed the model on the box, in the center of the surface Hmhorr. (Illustration 3) is desirable Lhgbihh the model number by Dskyot millimeters thick.

2. Cut sheet plastic surface Bmimdi frame.

3. Some paperclips hanging the frame ends with a gun a chance.

4. Heat the oven frame with a curtain (not in the "grid"!)

Warning! Please check each time the status sheet to prevent over-heating the material catching fire.

Have to work all the time with the gloves to prevent being.


5. Cshiriah softening soft rubber in a similar situation should be quickly put down on the - on the term model in the center of the box. (Illustration 4.5). Just before placing a sheet, you must run the vacuum cleaner.

6. Have to wait in this situation (drawing 5) As - 30 seconds to cool down the material.

7. Now you can turn off the vacuum cleaner to extract the model from the resulting. (Illustration 6)

8.


Finally, have cut the remaining plastic part and the resulting flying model.


Summary.

Proposed facility will serve you to the production of a variety of plastic parts Ltisnim getting low professional quality. Although manufacturing facility requires investment of time but if you can Keep the models to produce spare parts are available in minutes.

Good luck.

Old 07-21-2009, 03:33 PM
  #10  
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Default RE: giant scale f8f bearcat Thread



Well i wasent expecting that! thanks for that Amir,

I think you would have to have something a little special to mould such a large canopy? the plastic would stretch so much down the sides of the canopy it would be very flimsy, the old Royal Corsair ones were like that.

Your A.U.W. sounds low, shame you were not closer, you would save me a lot of balsa bashing!!

Keep up with the progress,

All the best,
Di n Dave....
Old 07-23-2009, 03:57 PM
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Default RE: giant scale f8f bearcat Thread

hi dave
what is AUW?
Old 07-23-2009, 06:18 PM
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Default RE: giant scale f8f bearcat Thread

I think AUW means "all up weight" (total weight). Someone please correct me if I'm wrong..
Old 07-25-2009, 04:55 AM
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Default RE: giant scale f8f bearcat Thread



Hi Guys,

Yes, you are correct it means 'all up weight' I dont know how much the blue/black 3W Bearcat i pictured came out at as i only painted it for a friend of mine, but i imagine it was around 42lb?

Keep up the good work,
Di n Dave....
Old 10-05-2009, 12:59 PM
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Default RE: giant scale f8f bearcat Thread

we back after a long break





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Old 10-06-2009, 11:29 PM
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Default RE: giant scale f8f bearcat Thread

looking for second-hand very good condition moki/rcs 215 !!!
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Old 10-07-2009, 12:04 AM
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Default RE: giant scale f8f bearcat Thread

I feel your pain[], I have a mini version of your Bearcat. It is a Jack devine Mdels Bearcat with the Magnum 400 5 cylinder radial. Currently being finished and detailed
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Old 10-07-2009, 07:32 AM
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Default RE: giant scale f8f bearcat Thread

nice one

and nice engine.
Old 10-10-2009, 04:58 PM
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Default RE: giant scale f8f bearcat Thread






Old 10-22-2009, 04:08 PM
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Default RE: giant scale f8f bearcat Thread

next












looking for second-hand very good condition moki/rcs 215 !!!
Old 10-23-2009, 11:21 AM
  #20  
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Default RE: giant scale f8f bearcat Thread

Interesting project

Two questions:

1 Where do you get this package?

2 Do you think the landing gear is going to stay in the wing with only the gear plate glued to the foam without any other support to distribute the load?
Old 10-23-2009, 11:57 AM
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Default RE: giant scale f8f bearcat Thread

hi diceman

this "package" made by a frind ,expert in bilding fiberglas rc planes
he made the that by a plans of cleveland models ,the size is similar to 3W bearcat.


the gear plate have arms that gose back to the center of the wing, and also conect to the main wood bar that go from side to side of the wing(under the veneer) in a fact that tow gear plate conect one to aech other.





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Old 10-26-2009, 07:21 AM
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Default RE: giant scale f8f bearcat Thread

Will look at the 3w bearcat now.Looking at the austars bearcat but it does'nt look scale.I would like to power a bearcat with a 450 saito radial as they sound awesome.Any help with suggestions or links much appreciated.96" span or should i go back to the 80" size,the cowl needs to be about 300mm in diameter.
Old 10-28-2009, 11:38 PM
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Default RE: giant scale f8f bearcat Thread

i think the austars bearcat looks good.(for this price) and also good for the 450 saito.
the scale Details you can add by your self , like i do all the time.
Amir
Old 11-08-2009, 03:18 PM
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Default RE: giant scale f8f bearcat Thread

engine decision-do you think that DLE111cc its good/enough/bad for the bearct
the weight of the ber supposed to be 21 kg
wings
-2.8 meter-110"

DL-111 Spec.
CDI Electronic Ignition.
Carburettor
Performance: 11.2hp @ 7500rpm
Idle: 1400rpm
Thrust: 25.5kg @ 100mtr / 22.3kg @ 1800mtr (Above sea level)
Suggested prop: 27x10, 26x10, 26x12, 28x10
Spark Plug: NGK CM6
Bore/Stroke: 45 x 35mm
Compression: 7.6:1
Weight: 2580g
Fuel: 2C Regular Gas mixed 30:1 - 45:1


[link]http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=7503[/link]
Old 11-16-2009, 01:00 PM
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Default RE: giant scale f8f bearcat Thread







almost.........

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