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Author Topic: Brodak Bearcat  (Read 31340 times)

Offline Avaiojet

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Re: Brodak Bearcat
« Reply #50 on: September 18, 2015, 09:37:56 AM »
Way to go Eddy!  Now I have Bearcat envy...

Yes, I do also.

Eddy,  H^^

Great job!!
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Offline Don Jenkins

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Re: Brodak Bearcat
« Reply #51 on: October 09, 2015, 06:31:13 AM »
Ed and I flew yesterday at Huntersville and had some great weather.  Ed got in the maiden flight plus one of the new Bearcat and it flies great and looks awesome in the air.  Can't wait to get back to the field for some more flying!

Don

Offline EddyR

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Re: Brodak Bearcat
« Reply #52 on: October 21, 2015, 01:24:42 PM »
well I look pretty frazzled in that picture. Hat hair,sweaty, and tired. Anyway I have pulled all the IC parts out and will be going to electric very soon. It pulled very easy with the detuned ST/46 so the typical {46 size electric should do it} It weighs 38 ounces empty. ~^
Ed
Locust NC 40 miles from the Huntersville field

Offline wwwarbird

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Re: Brodak Bearcat
« Reply #53 on: October 22, 2015, 06:34:21 PM »
Anyway I have pulled all the IC parts out and will be going to electric very soon.

 Whaaaat? Why?  :(
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Offline EddyR

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Re: Brodak Bearcat
« Reply #54 on: January 28, 2016, 05:35:41 AM »
I never did go electric,to much weight. I gave up on the ST/46 as it was filling the cowl with exhaust and I could not find a manifold to carry the exhaust behind the motor. I installed one of my Rustler/40's and used the rear exhaust setup and it pulled the plane fine on the same lines. There is no exhaust on the plane after the flight. I only have a couple of flights on the Bearcat since the change and have added lead to the nose each flight to get the CG and feel back to where I was with the 46 in it. Some cracks opened up at the wing body at the leading edge which surprised me so I need to fix that issue.The plane was built for this motor so it was a drop in.
EddyR
Locust NC 40 miles from the Huntersville field

Offline Air Ministry .

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Re: Brodak Bearcat
« Reply #55 on: January 28, 2016, 08:42:41 PM »
Ed and I flew yesterday at Huntersville and had some great weather.  Ed got in the maiden flight plus one of the new Bearcat and it flies great and looks awesome in the air.  Can't wait to get back to the field for some more flying!

Don

Great .

Offline EddyR

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Re: Brodak Bearcat
« Reply #56 on: April 22, 2016, 06:54:39 PM »
  Bearcat update. I repaired the wing to fuselage problem. It is now glassed inside and out. Since I had to make that repair I went ahead and built a in the cowl muffler exhaust system so I could use the ST/46.I took a lot of work to convert the Tatone muffler to what you see here. I had used the Tatone muffler on this motor so I new it would work in this cut down version. All internal tank tubing now. Uniflow sneaks out the cowl opening.
 Should be done for Huntersville next week.
  This is the very first Brian Gardener ABC motor.  It is still strong after all these years. #^
Locust NC 40 miles from the Huntersville field

Eric Viglione

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Re: Brodak Bearcat
« Reply #57 on: April 23, 2016, 08:27:03 AM »
Hey Eddy,

Looking forward to hearing how it works out!

EricV

Offline Jim Oliver

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Re: Brodak Bearcat
« Reply #58 on: April 23, 2016, 03:33:35 PM »
Eddy,

I have had one of the Brodak Bearcat kits waiting in line for too long........

Could you please detail the changes you made from the Brodak kit so that the final model is actually what Pat designed?

Thanks,
Jim
Jim Oliver
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Offline EddyR

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Re: Brodak Bearcat
« Reply #59 on: April 23, 2016, 10:13:39 PM »
Jim
 It is had to believe I started this a year ago. The changes I made are mentioned in #4 above. Here they are so you do not need to look for them.
"  There are a few changes on the Brodak kit but I have fallowed Pats suggestions. There are a few mistakes in the kit compared to the plans. The kit fuselage is like the Pat design but the kit plans are very different in the engine cowl.I also used 3/8 palsa for the front of the fuselage not laminated 1/4 sheet to the 3/32 sides. The plane is very close to the Rabe Bearcat but with a larger stab and thicker wing. Also equal wing panels. I spent a lot of time today shaping the stab profile,sand,sand,sand Grin"
 I changed the ruder shape a lot to make it look more scale like. Do not use any kit wood that is not contest grade. It is very hard to build to 50 ounces. I did everything to keep it light. Weight now is 54 ounces but it may have to much lead in the nose from the lighter motor that was in it.  I felt it was to light at 48-50 ounces but that may have been because it was slightly tail heavy. The CG was correct but it had instant turn. I do not like to fly on close spaced handle lines so lead was added. Penetration in wind improved a lot. I will repaint the cowl tomorrow and fly it this week. All the previous flights with the Rustler 40 and the ST.46 have been very good with no trim needed except nose weight. It takes a lot of weight in the nose to move the CG 1/4". I would not recommend any motor except a rear exhaust one as a side exhaust motor will fill the nose with exhaust residue.
  NOTE here is something I learned from building two bearcats. You can not use a on the side of the body tube for the uniflow. It is to far from the tank and the motor will go lean as the take gets half empty. Now my uniflow vent is next to the motor inside the cowl. If you look closely you can see my original tube sticking out the side of the body.
Ed
When I had the Rustler 40 in the plane I vented the uniflow out he bottom inline with the tank. I fought this problem for two years with my Rabe Bearcat. ~^
Ed
Locust NC 40 miles from the Huntersville field

Offline Jim Oliver

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Re: Brodak Bearcat
« Reply #60 on: April 24, 2016, 06:58:16 AM »
Eddy, Thanks for the reply......I did read post #4 but thought there might be more detail available as to Pat's suggestions for improvements.  Also took note of the dihedral reduction mentioned in post #31.

Can you help me out a bit with regard to the changes in the rudder that you mentioned?

BTW, I scratch built Pat's P51D (from his plans) and it it is probably the best flyer that I have:)

Cheers,
Jim

« Last Edit: April 24, 2016, 07:39:59 AM by Jim Oliver »
Jim Oliver
AMA 18475

Offline EddyR

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Re: Brodak Bearcat
« Reply #61 on: April 24, 2016, 05:54:28 PM »
Jim I will take a picture tomorrow. The plans shape didn't look correct. I pretty much copied the Rabe Bearcat rudder. Painted the cowl today and will mount it tomorrow. Then test run the motor and try and find a day this week with out high winds. This weekend looks good for the Hunterville contest. I have a total of five flights in this year.
 Also have a new All American built just like Harold's original.51" span not 49.5" as the kit builds.
Ed
Locust NC 40 miles from the Huntersville field

Offline Jim Oliver

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Re: Brodak Bearcat
« Reply #62 on: April 24, 2016, 06:54:41 PM »
http://www.airliners.net/photo/Grumman-F8F-2-Bearcat/2742484/&sid=51948825fe6cef24269a203855d863a5

Guess I could go back to Pensacola and look at the actual plane, too:)
Jim Oliver
AMA 18475

Offline EddyR

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Re: Brodak Bearcat
« Reply #63 on: April 25, 2016, 06:37:45 PM »
Jim     Here is the rudder as I built it. It is quite a lot different than what the plans show. I removed a lot off the front and made it narrower at the top. I am now almost scale shape. This view and the one your link went to look almost identical The kit canopy is nothing like a Bearcat canopy.
 Hope to fly it tomorrow. Also I did not use the movable rudder as I did on rabe Bearcat. I did not like it.
Ed
Locust NC 40 miles from the Huntersville field

Offline EddyR

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Re: Brodak Bearcat
« Reply #64 on: June 26, 2016, 09:04:49 AM »
Since no pictures yet I will add in a old one to keep interest going. Plus one from last December. #^
Ed
Locust NC 40 miles from the Huntersville field

Offline Air Ministry .

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Re: Brodak Bearcat
« Reply #65 on: June 26, 2016, 10:03:24 PM »
Green with Envy . A Bearcattts notta the bada ship , eh .

Theres a F8F1 & F8F2 , the F2 has the taller fin / ruddder , so looks differant .



wanna do the last one there , before the end of time .  >:(


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