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bridi -birdys - 11/4/2005 4:18:20 AM   
mgm52


 

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From: knoxville, TN, USA
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I need help from some of you classic pattern flyers. I have the itch to build a Birdi designed Dirty Birdy 60 , i have found 2 supplyers of the kits Bluejay airplanes and Sheldons Hobbies. Have any of you guys bulit the kits. maybe both? any known diffrences?Quality?Service? The prices are diffrent ,bluejay at 110.00 + 20.00 shipping --Sheldons 89.96 + 7.95 shipping . At this point i just want a good flyer but may at some point fly some SPA as we have a event here in Knoxville. I have considered the Utter Chaos also but i like the looks of Dirty Birdy. Any thoughts would be helpful. Thanks Mike
       Post #: 1

RE: bridi -birdys - 11/4/2005 5:29:51 AM   
funnflyerr


 

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Sheldon's Hobbies still has the remaining original Bridi Kits, call them if they really have the Dirty Birdy 60 in stock. Bluejay, on the other hand, got the rights to manufacture and continue selling "Bridi Kits" after Joe Bridi retired last year or so.

Good luck.

quote:

ORIGINAL: mgm52

I need help from some of you classic pattern flyers. I have the itch to build a Birdi designed Dirty Birdy 60 , i have found 2 supplyers of the kits Bluejay airplanes and Sheldons Hobbies. Have any of you guys bulit the kits. maybe both? any known diffrences?Quality?Service? The prices are diffrent ,bluejay at 110.00 + 20.00 shipping --Sheldons 89.96 + 7.95 shipping . At this point i just want a good flyer but may at some point fly some SPA as we have a event here in Knoxville. I have considered the Utter Chaos also but i like the looks of Dirty Birdy. Any thoughts would be helpful. Thanks Mike


(in reply to mgm52)
       Post #: 2

RE: bridi -birdys - 11/4/2005 1:14:26 PM   
Mturowski


 

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Your other chose may be to plan build. The RCM plans service should still have the plan available. Its a great flying plane. The fuselage does take a lot of sanding to get it done.

(in reply to mgm52)
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RE: bridi -birdys - 11/4/2005 2:56:09 PM   
Stripes


 

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The original kit from Sheldon's is a typical Bridi kit with no pictures in the directions. They can be difficult to follow. It is a builder's kit.

The original design was for the 60's of that era. The current 60's are underbores of the 90 sized case and thus heavy. I had to saw an inch off the firewall to get a Tower 75 to balance.

(in reply to Mturowski)
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RE: bridi -birdys - 11/5/2005 2:44:55 PM   
mgm52


 

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Thanks for the replies-all infomation is helpful

mike

(in reply to Stripes)
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RE: bridi -birdys - 11/17/2005 4:00:36 PM   
nastybirdi


 

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I'm presently buliding a DB60 from Bluebird. I've ordered an OS .61. Are you saying you needed to "move" the firewall back 1" to get it to balance properly or are you speaking of the issue you had with the tower .75? Would really appreaciate some help here as im about ready to install the firewall + the front retract.

(in reply to Stripes)
       Post #: 6

RE: bridi -birdys - 11/18/2005 12:28:29 AM   
Paternguy


 

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Leave the firewall where it is, the weight of the retract will help with balanceing it.

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RE: bridi -birdys - 11/18/2005 2:34:08 PM   
Stripes


 

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quote:

ORIGINAL: dave.hall

I'm presently buliding a DB60 from Bluebird. I've ordered an OS .61. Are you saying you needed to "move" the firewall back 1" to get it to balance properly or are you speaking of the issue you had with the tower .75? Would really appreaciate some help here as im about ready to install the firewall + the front retract.


My comment about trimming the firewall relates only to the original Bridi kit which is still available. I hope you will make some information available about the new Bluebird kit as you build it. I opted for the original Bridi kit because I wasn't sure what I was going to get with the Bluebird kit and the Bridi kit was cheaper by quite a bit.

Are there pictures in the instructions, are they clear and easy to follow, and what engine is shown on the plans?

(in reply to nastybirdi)
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RE: bridi -birdys - 11/18/2005 3:43:49 PM   
nastybirdi


 

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Stripes,

thank you so much for the clarification regarding the firewall location. firstly let me say this is only the second gas kit i've built so im not sure if you should use me as a test patient regarding complexity/quality of kit. i'm a mechanical engineer by trade so not much scares me. the kit calls for .61 as the largest size engine. since i wanted retracts i figured i'd opted for the largest engine. building is going well. the instruction book is sometimes complicated even with my technical skill. i think my lack of aircraft nomenclature might be the cause for most of my headaches. the fuselage is the most complicated from my perspective. also as another thread mentioned, there will be a ton of sanding on the fuselage to finish to size. last evening i designed and made the modification to the wings to accept the retract gears (the plans only show the position of the gear) and there are no supplied parts for the retract mounts, still have some work to do. i've finished the rudder and elevator. the fuselage is presently built (3-sides, bottom side open) with the #1 bulkhead missing. i was patiently awaiting you reply regarding the firewall location. my present delemia is the size of the wheels. if the pictures come through you can see i have plenty of room with the present sized wheels. the plans did not tell the size of the wheel to be used. i chose a 2.250" wheel but i think it's too big. i will be flying off grass mostly so this size might be good. but i think i will downsize to 2" so it doesn't look like a dumptruck w/wings. i'm also perplexed with the tank size. i've bought a 12oz but think i need bigger for the .61. again my last plane was a smaller .19 so i'm looking for some good feedback here. thanks again for your help.

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(in reply to Stripes)
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RE: bridi -birdys - 11/19/2005 4:31:02 AM   
mgm52


 

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Dave, Thanks for the Bluebird kit comments. what do you think about the Quality? wood? plans? instructions? As a buyer of the product i would you buy another. Why not e-mail bluebird and ask about wheel size. If you are flying off of grass would you not want the bigger size, retracted it seems it would not affect the flying . Please keep this thread informed with your build. I would really like to see the progress

thanks
Mike

(in reply to nastybirdi)
       Post #: 10

RE: bridi -birdys - 11/19/2005 1:23:06 PM   
Stripes


 

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There is good news here and bad news. The good news is that it looks exactly like the original Bridi kit. The bad news is that it looks like the original Bridi kit. From what I can see of the plans it is exactly what I have. From your completed parts it looks just the same.

Sooo. . . you need to mentally plan for a light engine or lighten the empenage. The K&B 61 is light and some have reports the Webra is too. Certainly the Jett 65 and 76 BSE engines are light but hard on the wallet.

I completed my plane up to the covering stage installed everything and then sawed and inch off the firewall to get it to balance. I just make up a new firewall. It flies very well with the Tower 75.

Consider putting a hatch on the bottom for the fuel tank. I never saw an airplane that sooner of later didn't need some attention there. Also any wood you take off shaping the fuse should help with the balance.

See, that was my question about Bluebird. Had they updated the design for modern engines and coverings. Aparently the answer is no. It is the exact Bridi design. The good news is that it is the original and flies beautifully.

(in reply to mgm52)
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RE: bridi -birdys - 11/19/2005 4:02:49 PM   
Paternguy


 

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I found that by converting to a taildragger with the modern engines, the balance comes out just right. Just my two cents worth.

I was woried about nose overs, but so far that hasn't been an issue. I know some of you guys think real planes hae 3 wheels, but it is a simple solution to the problem, and it works great.

(in reply to Stripes)
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RE: bridi -birdys - 11/21/2005 7:53:16 PM   
nastybirdi


 

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Mgm2,

The quality of the kit looks very nice compared to those that I’ve seen. From a building point of view I’d prefer to see more details on the plans e.g. more cross sections of the fuselage etc. Like I said I struggled with the building of the fuselage because of the “part nomenclature” but finally figured it out the next day. I would have preferred to have better guidance into mounting retracts in the wings and nose but I guess they can’t cover everything when they are trying to mass product kits. There were two pieces of wood that were broken when I unpacked the kit but it didn’t have an impact. Other than that I’d buy another kit from Bluebird.

Stripes,

I’m bumming big time from your comments. Not that it’s your fault but I hesitated installing the firewall for a long time until I got assurance that it wouldn’t cause a problem. Unfortunately, I installed it yesterday afternoon and didn’t read this message till this morning. As you can see from my previous pic’s the firewall is sitting on the plans! Oh well not your fault.. To settle this I’ll go home tonight and flop the whole plane on the CG machine and see what’s up with this weight distribution thing.

8178,

Special thanks to 8178 here!

I plagiarized and modified your wheel well tip (from your kwik fli III thread). Your build had the advantage of a foam wing so I had to improvise. I first glued a small overlap piece onto one end of the strip to act as a joining point. I then wrapped some 1/32” plywood around a 2.5” hole saw to make a perfectly round well. NOTE: make sure the overlap piece is glued with the grain running parallel with the well diameter. Had a “blonde moment” and did one with the grain running perpendicular and it cracked when I rolled it on the table to join the 2 ends. I placed the strip with the joining strip on the table with duct tape under it so when I rolled it into the joint it would hold the two ends together. I then had to use a small carpenters clamp to hold down the glue end around the hole saw.

I then used the 2.5” hole saw to cut a hole in a piece of ½” foam to act as a carrier for the well. I then glued the round well inside the foam hole. When the epoxy was dry I sawed up close to the round well to remove 1/8th of the foam from one side. I then glued the whole thing between the two wing ribs. I followed your fillet tips to make perfect fillets in the wells. When a 2.25” wheel is put into the finished well there is approx. 1/16” around the wheel. Couldn’t be more perfect.

I skinned the wings and glued the firewall in on Sunday (but now regret it).

Patternguy,

Hope I luck out and it balances properly this evening or I'm filling in those perfect wheel wells and draggin the tail!

PS anyone wanna donate some sanding time for the fuselage?

(in reply to Paternguy)
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RE: bridi -birdys - 11/21/2005 11:39:28 PM   
Ed Cregger


 

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quote:

ORIGINAL: Stripes

The original kit from Sheldon's is a typical Bridi kit with no pictures in the directions. They can be difficult to follow. It is a builder's kit.

The original design was for the 60's of that era. The current 6