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Old 10-03-2017, 02:18 AM   #251
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Did it ever sell? He did have it for sale awhile back.


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Old 11-03-2017, 12:58 PM   #252
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Looking at the side view. I know a few like the guppy hump, but i think i am likeing the looks of the straight back more and more.

This is my canopy contour view. Once i have this set the way i like i will plot full size curves and ship the templates to Airplane Plastics for manufacture of the canopy.

Been Quite here...


File Type: pdf canopy side view.pdf (1.26 MB, 156 views)
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Old 11-04-2017, 04:15 AM   #253
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I like the straight back too.
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Old 11-04-2017, 01:05 PM   #254
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would anyone know why attachments sometimes post as a file, and sometimes they appear as the image of attachment, such as the above PDF.

I have wondered how to control the option, or even if i have the option to control that.
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Old 11-04-2017, 01:39 PM   #255
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It probably doesn't matter unless you are doing unlimited aerobatics but I remember an article in the Starduster magazine explaining the reason for the shape of the turtle back on the Acroduster 1. I will see if I can find which issue later today.
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Old 11-04-2017, 10:02 PM   #256
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Quote:
Originally Posted by billdit View Post
It probably doesn't matter unless you are doing unlimited aerobatics but I remember an article in the Starduster magazine explaining the reason for the shape of the turtle back on the Acroduster 1. I will see if I can find which issue later today.
Now that would be very interesting to see
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Old 11-05-2017, 01:01 AM   #257
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The article I mentioned is in the July 1976 issue of the Starduster magazine.
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Old 11-05-2017, 01:32 AM   #258
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Cool thanks. So the humpback served to cancel left turning tendencies. Wow. I would have never guessed that in a million years.

I wonder how many current aerodynamic engineers would agree this has a relevant impact.
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Old 11-05-2017, 01:42 AM   #259
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You are welcome. It was fun looking through the old magazines. There is a lot of good information in them.
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Old 11-09-2017, 12:04 AM   #260
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I think everyone left?

Still making progress....
IMG_3944.jpg  
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Old 11-09-2017, 02:31 AM   #261
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Beautiful.
Chris...
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Old 11-09-2017, 01:54 PM   #262
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WoW that is looking amazing!
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Old 11-12-2017, 01:23 PM   #263
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After scratching my head for a few days as to how to bend my canopy hoop frames without investing in a whole bunch of money into special tooling. After talking to a few folks this is what I did. I was sceptical at first but amazed at the results. I wasn't able to find many others on this forum encountering this, so I am posting my experience to hopefully help someone.

The solution is to fill the tubing with fine glass beading material, and capping both ends. Then work the tubing around a simple home made shoe. I Marked stations every few inches so I could keep track of doing the same process to both sides of the curve. As a template I plotted the curve to in Corel Draw and printed them off on our cutter. You could easily hand draw this as well. I cut the template out of light plywood and clamped to a saw horse beside my work area. It took longer to figure all this out then it did to do the actual work the individual pieces. Now that I know what I am doing I think I could bend a near perfect hoop in about 30 minutes, but the first on was a few hours of effort.
IMG_3951.jpg   IMG_3952.jpg   IMG_3953.jpg   IMG_3954.jpg  
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Old 11-12-2017, 03:05 PM   #264
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Very nice! Did the bolts fit tight enough to stay or did you have to tap the tube?

I used an electricianís EMT bender to do mine. I didnít have the foresight to mark the tube or bender though. Thatís a good idea.
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Old 11-12-2017, 03:09 PM   #265
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I did the exact same thing when I was building the empennage on my Pitts. Had some real tight radius's and the only way I could get them bent without the tube deforming and kinking was to fill them with sand. I used regular sandbox sand and had great results. Looks good!
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Old 11-12-2017, 03:15 PM   #266
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Quote:
Originally Posted by bneub View Post
Very nice! Did the bolts fit tight enough to stay or did you have to tap the tube?

I used an electricianís EMT bender to do mine. I didnít have the foresight to mark the tube or bender though. Thatís a good idea.

Metric bolts were nice and snug drive fit
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Old 11-13-2017, 11:39 PM   #267
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Default Rebuild N85CH Acroduster

Here is the rest of the weekend work. It's coming but I need to keep tweeking to make it all work. The basic geometry is working though.
File Type: jpg IMG_3955.jpg (337.9 KB, 246 views)
File Type: jpg IMG_3957.jpg (334.0 KB, 246 views)
File Type: jpg IMG_3959.jpg (355.8 KB, 254 views)
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Old 11-14-2017, 01:25 AM   #268
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Canopy stuff takes forever! Looking good!
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Old 11-19-2017, 02:57 AM   #269
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Question : Has anyone every identified the airfoil used on the Acroduster. All i every found was "modified symmetrical". What the heck does that mean?
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Old 11-19-2017, 03:01 AM   #270
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Some airfoils were slightly concave in the area of the rear spar. They were modified with a straight line across the concave section... I don't know if that applies in this case.

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Old 11-19-2017, 03:45 AM   #271
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Quote:
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Question : Has anyone every identified the airfoil used on the Acroduster. All i every found was "modified symmetrical". What the heck does that mean?

Found this but it doesn't exactly say what the plans airfoil is. Dave will know.


Posted: Wed Feb 11, 2009 11:53 pm Post subject: Airfoils and the Super Starduster Morgan Your question about Airfoils and Stardusters is an interesting one,the SA-100 also used the M-6 airfoil in the later plans, there were also several airplanes known as the Super Starduster the first was probably a single place Starduster that was raced at Reno in the late 1960s. the second was probably the prototype Acroduster Too N5462 and was registered as a Super Starduster Too, this one was recently lost in the fatal accident around Labor Day 2007. This airplane also used the Osborne R 1 airfoil which was a modified version of the NACA 63A012 series airfoil. On the second company airplane N750X it at one time had the modified Osborne R 1 that had a sharper leading edge radius, this was suppose to make it snap roll better. But according to John Helton who flew it in competition said that some times it would snap when you did not want, or expect it to. It was later changed during a subsequent rebuild. and the latest airplane that was known as the Super Starduster was the later single place Known as the SA-101, there were only two of these ever built that I know of N191DG and N9116Y This eccentually was the SA-700 single place Acroduster One, but with a steel tube fuselage instead of the all aluminum one. I hope this clears up the confusion ? Dave
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Old 12-01-2017, 01:11 AM   #272
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Turns out the answer is in the plans. It is derived from the NACA 63A012. I guess back n those days it was cool if the designer "made" his own airfoil. I don't think today that would "fly" so to speak.
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Old 12-01-2017, 01:17 AM   #273
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Ok so the decision has been made to weigh the aircraft before avionics, canopy, turtleneck, cowling, and propeller have been finalized. Everything from here out will be mathematically figured for weight and balance calculation.

The benefit of doing this is two fold. First I get to do a test fit and test rig the airplane, this is especially helpful since I rebuilt the cable struts. The second reason is my favorite. I get to see it together. Lol.
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Old 12-01-2017, 01:21 AM   #274
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Hopefully it will rain tomorrow and all my customers will have to come Monday. I'll spend the day tacking all the pieces on and get her up on scales.
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Old 12-01-2017, 01:41 AM   #275
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Looking good Kendall. I really like the paint contrast between wings and fuselage.
Not!

Back to airfoils. I think many are "modified" at least slightly in thickness to accommodate various spar thickness and/or placement?


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