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RE: WACO YMF - 9/26/2012 3:34 AM   
Dash7ATP



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I love the sounds of a radial engine. I flew a Beaver for about 250 hours in the Army many years ago. The R-985 @ 450 HP made a great sound. The prop went sonic on takeoff and you could hear one taking off several miles away! 

I have reached the point on my WACO of setting up the wing rigging and attaching points for the N-Struts and flying wires. I have already shown how I mounted the lower wing fittings. These were all on top of the wing and not to difficult to set up. The top wing fittings all have to protrude through the bottom surface, and took me a litle time to decide how I wanted to do it.  I decided on K & S sheet brass of various thickness bent into a squared "U" shape and protruding through 1/8 inch aircraft plywood. Since the full scale flying wires all terminate inside the wing, these are not true scale, but I think they will look pretty good. I have kept the parts that show as small as possible. 

The N-Strut end fittings are also shown below. I decided to go with the 5/8 inch alum streamline struts from K & S (I think). I know, the real ones are more of an elongated oval. I actually shaped the wood ones that came in the kit, but they were also tear drop shaped.  At least they came in handy as a means to attach the brass fittings into the aluminum struts. 

I'll have a few more photos as soon as I get the struts made and ready to mount.



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RE: WACO YMF - 9/26/2012 4:28 AM   
jymster



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quote:

ORIGINAL: skypup50

Worth its weight in gold, isn't it (nitro)? If I buy this 7-35 radial I won't need to worry too much about fuel cost. I wouldn't expect to fly the plane very often. I have a Spacewalker with a Saito FG-21 petrol for sport flying. The Waco would be more for show and that engine would really be perfect if it doesn't overheat.



You should not have any overheating problems, especially if you baffle the engine. The cowl has a lot of open area at the front, and not so much at the back, so you need to reduce the frontal area and force the air flow through the fins on the cylinders. I am using the front view drawing from the Horizon website as a template for the baffling of my 77cc. I just blew it up to 1:1 scale and will stick it to some light ply. You can find the 35cc drawings here: http://www.horizonhobby.com/pdf/EVOE735-Drawings.pdf

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RE: WACO YMF - 9/26/2012 5:30 AM   
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Joe, N strut fittings, and hardware designs look great, very nice work. George

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RE: WACO YMF - 9/26/2012 11:46 AM   
Stickbuilder



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quote:

ORIGINAL: georgewaldrop

quote:

ORIGINAL: Stickbuilder


quote:

ORIGINAL: georgewaldrop

I was remembering the comments about the inaccuracies on the Pica plan...did you ever get your true scale 25% scale plans done Bill? One of these days I WILL get another Waco built!


The Pica is way out of whack as far as the framework goes. The basic outline is pretty good, but getting the thing built to any degree of being scale requires a lot of rethinking. The entire wing plan is junk as is the tail.

The one that I'm doing from the original plans is going to be a 27% version and the top wing span is 97.4 inches.

Bill, Waco Brother #1
Bill,

I would be in for a set of those plans when you get them available...I have thought about the larger kits, but honestly don't want to spend the money to buy a kit that large...nice as they are, I'd rather build it from good plans. Thanks for the info...I knew the wings were not correct on the Pica, both in some of the rib profile/contour and the spar placement, and probably other places. I didn't know (probably read it here, but I have slept since I did!) the tail was out of whack...what is off on it (besides the non adjustable stab)? :<)


As to the tail being off, the leading edges of all the surfaces are not correct, and the cross section is way too fat. Other than that, it's kinda-sorta okay.

Bill, Waco Brother #1

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RE: WACO YMF - 9/26/2012 2:36 PM   
ceije


 

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To all, for what it's worth- for those who don't have the time or are not very good at making small parts such as the strut fittings as I am Lou Proctor has a large selection of these to choose from.-

Chris melhus ceije 196


"sometimes you have to build it a little wrong in order for it to look right"DAVE PLATT

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RE: WACO YMF - 9/26/2012 3:19 PM   
LesUyeda



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"Other than that, it's kinda-sorta okay. "

Otherwise known as "squint" scale:-)))))))))))))))

Les

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RE: WACO YMF - 9/26/2012 3:49 PM   
georgewaldrop



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Bill,

RE: scale fidelity in the Pica kit...

I am not a masters class builder, heck I'm barely what anyone in their right mind would call a "builder" LOL! What, in your opinion, are the best relatively readily available scale drawings of the Waco, so that I could start studying where I might more easily see/understand which areas you are refering to (leading edge - is the overall shape of the tail surface incorrect or is the thickness of the LE wrong due to the thicker cross section you mention of the surface?) I am enjoying learning more about scale design and building, of which you have been an inspiration. Keep it up!



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RE: WACO YMF - 9/26/2012 11:23 PM   
Dash7ATP



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quote:

ORIGINAL: ceije

To all, for what it's worth- for those who don't have the time or are not very good at making small parts such as the strut fittings as I am Lou Proctor has a large selection of these to choose from.-

Chris melhus ceije 196


"sometimes you have to build it a little wrong in order for it to look right"DAVE PLATT


I did look at what Procter had to offer. That's why I designed my own. I didn't see anything that would lend itself to what I had in mind. They do have a lot of different small brass parts. The turnbuckles look more like they belong on boats, or WW I type aircraft. 

Joe




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RE: WACO YMF - 9/27/2012 1:11 AM   
Stickbuilder



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quote:

ORIGINAL: georgewaldrop

Bill,



I am not a masters class builder, heck I'm barely what anyone in their right mind would call a ''builder'' LOL! What, in your opinion, are the best relatively readily available scale drawings of the Waco, so that I could start studying where I might more easily see/understand which areas you are refering to (leading edge - is the overall shape of the tail surface incorrect or is the thickness of the LE wrong due to the thicker cross section you mention of the surface?) I am enjoying learning more about scale design and building, of which you have been an inspiration. Keep it up!




The best drawings are the archive drawings that I have from the original Factory prints. The problem with the tail feathers begin with the slab and rib design. There is no way that you will ever get a scale outline from that. The original full scale uses ribs, spars and a tubular leading and trailing edge design. It is as far off as are the wing tips. If you put it on the table at Top Gun with a good set of 3 views, you would never be in contention for a trophy.

Bill, Waco Brother #1

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RE: WACO YMF - 9/27/2012 1:14 AM   
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Bill, do you know if anyone has done a good 3-view from the Waco factory drawings? I have the factory drawings, but there are so many and they are in some weird, difficult to navigate order. It would be nice if someone has already done the hard work and collated everything from the factory drawings into a nice, concise 3-view.

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RE: WACO YMF - 9/27/2012 2:31 AM   
georgewaldrop



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quote:

ORIGINAL: jymster

Bill, do you know if anyone has done a good 3-view from the Waco factory drawings? I have the factory drawings, but there are so many and they are in some weird, difficult to navigate order. It would be nice if someone has already done the hard work and collated everything from the factory drawings into a nice, concise 3-view.
Here! Here!

Inquiring minds want to know...!!!

Thanks Bill for the information, and jymster for the concise query! Although, I do not have the factory drawings :<(

have a Blessed Day!
George



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RE: WACO YMF - 9/27/2012 11:42 AM   
Stickbuilder



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quote:

ORIGINAL: jymster

Bill, do you know if anyone has done a good 3-view from the Waco factory drawings? I have the factory drawings, but there are so many and they are in some weird, difficult to navigate order. It would be nice if someone has already done the hard work and collated everything from the factory drawings into a nice, concise 3-view.


Be careful what you wish for. If we were to use an accurate set of 3 views, we might not do so well at a contest. If someone wishes to take this on, I will be happy to provide a set of the drawings.

Bill, Waco Brother #1

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RE: WACO YMF - 9/30/2012 10:56 AM   
Stickbuilder



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Got the Waco out yesterday evening and dusted it off. Gonna either need to return to the build, or get after the 27% drawings. Sometimes It's difficult to get into the building mood, but I feel it coming on. So many planes to build, and so little time left.

Bill, Waco Brother #1

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RE: WACO YMF - 9/30/2012 3:57 PM   
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I need some info from someone with 1/5 waco experience. The evolution 7-35 radial will fit. It generates 2.2 HP and swings a 17" to 18" prop at 1000 to 6300 rpm. Displacement is 35cc and it weighs 3#. It would fit nicely. Is this enough power to fly this plane? Thanks for the help, I appreciate it. It's a lot of money and I would not want to screw this up.

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RE: WACO YMF - 9/30/2012 6:27 PM   
Jacque


 

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I have flown this plane with a G-23 for several years and befor that I used a 90 and was really scale under powerd for my taste



Jacque
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RE: WACO YMF - 9/30/2012 9:00 PM   
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Bill,
I’d like to see you get back to the build and give me some inspiration I've been in a building slump lately and need a kick start LOL.

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RE: WACO YMF - 10/1/2012 11:53 AM   
georgewaldrop



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I agree with Dan, regardless of how bad I want a set of those plans...I need some inspiration to get going on mine!


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RE: WACO YMF - 10/1/2012 7:43 PM   
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Re: Aluminum struts for the Pica WACO

I currently have expressions of interest from two people for aluminum sheet struts like those I have mounted on my WACO.  I have spoken with the fab shop that made mine, and can buy sets for substantially less than the $105, plus tax I paid if I order in quantity.  Specifically, if I order 2, the cost is $90 each.  If I order 3 sets the cost is $82 each.  4 sets would be $75.50 each.  At five sets the price is down to $75 each.  I do not intend to become a dealer, and will add only shipping at cost for each set.  Please let me know by PM if you are interested.

Thanks,

Jim


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RE: WACO YMF - 10/2/2012 2:43 AM   
rccrasher65


 

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Dan , get to building, push, push, there it is all the inspiration we all need, need to start adding more posts also, the Fleetbrotherhood is passing us up on posts per day. Happy building, build a WACO!!

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RE: WACO YMF - 10/2/2012 3:25 AM   
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A few posts back, I showed you the fitting I made for my N-Struts. I finally finished them over the weekend. They may not have scale ends on them, and the sross section is stream lined rather than a flattened oval, but I don't think they look too bad.  They finished up at four ounces for the set. Total costs about fifteen dollars or so counting the brass I used for the end pieces. 

My only concern now is the time required to install and dismantle them to go flying. Not to mention the flying wires.  I'm not sure if it will go into my Caravan fully assembled.  Does anyone have any experience with this?

Joe



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RE: WACO YMF - 10/2/2012 3:59 AM   
skypup50


 

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quote:

ORIGINAL: Dash7ATP

A few posts back, I showed you the fitting I made for my N-Struts. I finally finished them over the weekend. They may not have scale ends on them, and the sross section is stream lined rather than a flattened oval, but I don't think they look too bad.  They finished up at four ounces for the set. Total costs about fifteen dollars or so counting the brass I used for the end pieces. 

My only concern now is the time required to install and dismantle them to go flying. Not to mention the flying wires.  I'm not sure if it will go into my Caravan fully assembled.  Does anyone have any experience with this?

Joe





Looks good. For quicker assembly/dis-assembly you might consider clevis pins and clips like they use on r/c car hoods. Much quicker than bolts and nuts.


http://www.grainger.com/Grainger/clevis-pins/pins/fasteners/ecatalog/N-8ly?Ndr=basedimid10071&sst=subset#http://www.grainger.com/Grainger/clevis-pins/pins/fasteners/ecatalog/N-8lyZ1z0o3oj?Ndr=basedimid10071&sst=subset

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RE: WACO YMF - 10/2/2012 3:20 PM   
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"Does anyone have any experience with this?"

Me. I bought a crew cab dually, and put a camper shell on it:-))))))))))))

Les



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RE: WACO YMF - 10/2/2012 4:00 PM   
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Les I use that system alot.  Here is a couple of ideas, make up some wheel chocks to keep things from moving around.  The best ones I found hold the axles up so you do not get flat spots on soft tires. Also you might want to make the platform they are sitting on sliding so you can pull it out and save having to climb in the back bent over to get at what is in front.  Just a couple of thoughts hope it helps.

Larry
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RE: WACO YMF - 10/2/2012 5:34 PM   
Dash7ATP



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quote:

ORIGINAL: skypup50


quote:

ORIGINAL: Dash7ATP


My only concern now is the time required to install and dismantle them to go flying. Not to mention the flying wires.  I'm not sure if it will go into my Caravan fully assembled.  Does anyone have any experience with this?

Joe





Looks good. For quicker assembly/dis-assembly you might consider clevis pins and clips like they use on r/c car hoods. Much quicker than bolts and nuts.


http://www.grainger.com/Grainger/clevis-pins/pins/fasteners/ecatalog/N-8ly?Ndr=basedimid10071&sst=subset#http://www.grainger.com/Grainger/clevis-pins/pins/fasteners/ecatalog/N-8lyZ1z0o3oj?Ndr=basedimid10071&sst=subset


 I would like to use clevis pins, but the problem is size. They would have to go through a piece of 1/8 inch brass tubeing. I'm using a 2-56 socket head screw now. 

Joe



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RE: WACO YMF - 10/2/2012 5:43 PM   
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Re;  Aluminum landing gear struts

After only one day since I posted my offer I have 3 commitments for aluminum struts for the 1/5 scale Pica WACO.  The unit cost is now down to $82.  The next order will bring the price for all buyers down to $75.50.  I will wait a couple more days before placing the order with the fab shop to see if I get additional inquiries.

Jim



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