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Joined: 10/28/2003 From: Sammamish,
WA, USA Status: offline
quote:
ORIGINAL: Chad Veich
I figured at least a few guys would want to go with the Robarts. If we can keep it down to those two options (Aune and Robart) I can probably engineer two different sets of parts and provide the necessary ones depending on what gear is to be used. If somebody decides to go with a third option then they will probably be on their own in that area! I do have access to a set of the 148's so that will not be an issue.
While I'm planning to use the Aune gear, we should make sure not to design-out any alternatives. For example, Sierra would be my "plan B." I see too many times that life gets in the way for the 1-man shops and hobby orders have to take a back seat to a variety of health, professional or personal issues. So let's maybe optimize for a design or two, but keep our options open.
Tom
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Currently building a 1/6 Scale F4U-1A Corsair (BuNo 17777) and finishing a TF 1/8 Corsair
Posts: 1340
Joined: 10/28/2003 From: Sammamish,
WA, USA Status: offline
Please take a few moments to read this post and the attached drawing carefully!
This is what I will call the "speak now or forever hold your peace" post on the tailwheel. I realize as I get ready to tell Chad to hit "print" on the design, that I've given you guys a lot of hints at my research and logic, but haven't taken the time to "show my work" on one page so that you can get comfortable with how I approached the problem and arrived at my conclusion. If you see anything here that you don't like (or that maybe I wasn't too smart about), then this would be an outstanding time to comment.
What first seems like a challenging task on sizing the tailwheel gets really easy if we can agree on five "givens". Those are:
The ideal position of the retracted wheel hub (caught a problem in my notes - should read 20% of "H" stab and not v-stab.)
The location of the bulkhead and the pivot point where the lower struts attach to the airframe
The geometry of the lower strut assembly
The shape and length of the wheel forks
the ideal positon of the wheel hub at the down (uncompressed) position
These are the things I would like you to review and validate in the drawing below. If you have any evidence that suggest that the five "givens" are wrong, then please post that as well. If we agree on these, then the entire TW assembly can be scaled based on the length of the line between Point A and Point B. To give you time to weigh in, I'd suggest that we leave a comment period open til end of day Friday. Then Chad can make a cut-sheet for me and I'll actually build one. Updated: I also attached the fullsize .jpg that Chad sent showing both the up and down positions. You can print this on 8.5 by 11s, tape it all together and really geek out with it if you wish.
Have fun! Tom
< Message edited by SMUGator -- 4/9/2008 11:11:57 PM >
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Currently building a 1/6 Scale F4U-1A Corsair (BuNo 17777) and finishing a TF 1/8 Corsair
Posts: 62
Joined: 7/4/2002 From: crawfordsville, IN, USA Status: offline
hi guys, I'm building a bt 82" corsair. following your thread,lots of good input and info. Is this a closed build or are you taking on other builders? Corsair is my favorite plane. I have been away from the hobby and getting back involved.
Posts: 62
Joined: 7/4/2002 From: crawfordsville, IN, USA Status: offline
hi guys, I'm building a bt 82" corsair. following your thread,lots of good input and info. Is this a closed build or are you taking on other builders? Corsair is my favorite plane. I have been away from the hobby and getting back involved.
Posts: 1682
Joined: 9/2/2004 From: Beech Grove,
IN, USA Status: online
quote:
ORIGINAL: jetfool hi guys, I'm building a bt 82" corsair. following your thread,lots of good input and info. Is this a closed build or are you taking on other builders? Corsair is my favorite plane. I have been away from the hobby and getting back involved.
Rex
Rex,
Other builders are welcome, however we are using the Royal plans instead of the BT. The Royal are more accurate and as you have probably read even those are being scrutinized and some changes are being made to the final product. The ultimate goal is to build the most scale Corsair we can.
Posts: 62
Joined: 7/4/2002 From: crawfordsville, IN, USA Status: offline
I have the fus built,fin/rudder,stab and elevator. IN the process of building the retracts from the plans now[mains] I built the tw per plans but would like to build a better one. I bought plans and acc. from B Holman many years ago. I want to build it as an fru-i birdcage (Marines Dream) so I'll blow -up my three veiw and make my canapy. I work in indy and have been a milwright/machist for 20 yrs. How would one join your build.
Posts: 62
Joined: 7/4/2002 From: crawfordsville, IN, USA Status: offline
I have the fus built,fin/rudder,stab and elevator. IN the process of building the retracts from the plans now[mains] I built the tw per plans but would like to build a better one. I bought plans and acc. from B Holman many years ago. I want to build it as an fru-i birdcage (Marines Dream) so I'll blow -up my three veiw and make my canapy. I work in indy and have been a milwright/machist for 20 yrs. How would one join your build.
Posts: 1340
Joined: 10/28/2003 From: Sammamish,
WA, USA Status: offline
quote:
ORIGINAL: jetfool
I have the fus built,fin/rudder,stab and elevator. IN the process of building the retracts from the plans now[mains] I built the tw per plans but would like to build a better one. I bought plans and acc. from B Holman many years ago. I want to build it as an fru-i birdcage (Marines Dream) so I'll blow -up my three veiw and make my canapy. I work in indy and have been a milwright/machist for 20 yrs. How would one join your build.
Well first you need to send me a PayPal with the $200 initiation deposit. Then we'll need to convene a special meeting of the Secret Brotherhood of Balsa and Bent Wings, then...
Seriously, all you really need to do is get a set of the plans and drawings from one of the guys and get started. Are you sure you really want to do that, though? You're a long way down the road on your BT build to shelve all that work and start something new. I'm sure that most of us would be happy to help you offline with some things like the tailwheel if you'd rather stay the course.
Tom
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Currently building a 1/6 Scale F4U-1A Corsair (BuNo 17777) and finishing a TF 1/8 Corsair
Posts: 62
Joined: 7/4/2002 From: crawfordsville, IN, USA Status: offline
Tom, $200 .., What a deal! Some Turbine flyers won't talk to a prop driver for that . About the secret ritual Does it hurt?
Honestly, I am planning to finish my BT corsair,still have the wing to build, but would love to build a more accurate corsair with all the bells and whistles. What is your time frame going to be for those building this corsair? Will Chad sell the lazor cut parts to those wishing to build later ? My e-mail address is reveretts@peoplepc Thanks for all your information.
Posts: 1340
Joined: 10/28/2003 From: Sammamish,
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On the timeframe, I'd say that your guess is as good as mine. Much like the TF Group Build on the warbirds forum, I suspect that we will see people come and go here for 3-4 years, and it may take on a life of its own. If I'm really honest with myself, it will probably take between 12 and 18 months to build mine and do what I want to do with it.
Tom
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Currently building a 1/6 Scale F4U-1A Corsair (BuNo 17777) and finishing a TF 1/8 Corsair
Posts: 1682
Joined: 9/2/2004 From: Beech Grove,
IN, USA Status: online
Jetfool,
What Tom didn't mention is after the initiation fee, there is a monthly maintenance fee of $25 per builder. Since I am the closest to you (I live in Beech Grove, southeast side of Indy) the fees will have to be paid in cash to me... hehehe
Seriously, I was also building a BT and am about as far along with it as you are. But I have put that in the closet and it's fate is undecided.
As Tom said, PM some of the others on this group and they'll get you up to speed. Everyone here has been great and helpful. Some of those that are building or helping with the process are: Riddle-4U DaddySam SMUGator Tripower455 Chad Veich and myself.
If I've left anyone out let me know.
Welcome aboard!
< Message edited by rwright142 -- 4/12/2008 11:27:55 PM >
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Joined: 12/13/2001 From: Litchfield Park,
AZ, USA Status: offline
Based on the exchange of ideas on the previous page I have redesigned the elevators and rudder in order to get rid of the large chunks of balsa that made up the L.E. of these parts. The drawing below shows the basic construction of the first half of one elevator, to include a 1/32 plywood core with laser cut balsa half ribs and sub-leading edge.
Then the structure is laminated with a 1/64" plywood skin which nicely replicates the sheet metal found on the full size. Flip it over and do it again then add the balsa leading edge and tips. Much less carving this way, lighter, and probably more scale.
< Message edited by Chad Veich -- 4/10/2008 9:24:55 PM >
Posts: 304
Joined: 11/1/2007 From: Denver,
CO, USA Status: offline
Perfect Chad, just what I was thinking (per previous post). I like that you just incorporated my cap strip thinking, and leading edge sheet into one piece. - Eric
Posts: 62
Joined: 7/4/2002 From: crawfordsville, IN, USA Status: offline
Tom,
My computer is not letting me send e-mail or a PM thru this forum . Could you send the tailwheel info to my home e-mail, reveretts @peoplepc . I'll check my settings on RCuniverse, it has been awhile since i have done this. Probally just the nut behind the screen. Thanks
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RE: 1/6 Scale F4U Corsair Group Build - 
