Author Topic: The Sky Streak is coming! The Sky Streak is coming! (Read 3071 times)

Larry Renger · « **on:** October 06, 2011, 10:22:19 AM »

The article is in the November issue of Flying Models. I hope you guys like it!

Tim Wescott · « **Reply #1 on:** October 06, 2011, 10:46:26 AM »

I got my issue a couple of days ago. Nice article. Nice plane. Nice nice nice.

I'm trying to decide between attempting to get my Norvel 049 running (which has proven problematical), building a reduced-size version and slapping a Cox reedie on it, or rewinding a sick motor that I have and going electric.

john e. holliday · « **Reply #2 on:** October 06, 2011, 06:54:55 PM »

Got my issue of FM yesterday and read the article last night. Will be ordering plans and hope my TeeDee is enough for it. By the way did I day it is a great read with great pics.

Larry Renger · « **Reply #3 on:** October 06, 2011, 11:10:08 PM »

Tim - I have plans for the Black Widow one. It is the mid-size version in the photo with 3 planes. Why re-invent the wheel?

Dennis Adamisin · « **Reply #4 on:** October 08, 2011, 11:44:25 PM »

Quote from: Larry Renger on October 06, 2011, 10:22:19 AM

The article is in the November issue of Flying Models. I hope you guys like it!

I do! It looks like your prototype used a Trike, but the plans show a taildragger - because???

Jim Thomerson · « **Reply #5 on:** October 09, 2011, 08:04:55 AM »

Very nice. I really like the development process. Maybe I'll scale one up to about 54 in span and put a Tower 40 on it. There is a similar looking Old Time Stunt legal airplane. I've seen a photo but haven't been able to find out anything more. So I have contented myself with building four Dmeco Sportwings.

Larry Renger · « **Reply #6 on:** October 09, 2011, 05:30:04 PM »

The OT legal plane may be Don Butman's from 1948. He still has one! Here is the contact information I have for him.

Don Butman
818-340-2563

I switched from Trike to Taildragger because I could never find a trike setup that would land without disasterous multiple bounces.

The taildragger can be greased in beautifully. maybe someone else can solve the problem.

Joseph Lijoi · « **Reply #7 on:** October 10, 2011, 06:59:43 PM »

Quote from: Jim Thomerson on October 09, 2011, 08:04:55 AM

Very nice. I really like the development process. Maybe I'll scale one up to about 54 in span and put a Tower 40 on it. There is a similar looking Old Time Stunt legal airplane. I've seen a photo but haven't been able to find out anything more. So I have contented myself with building four Dmeco Sportwings.

Larry

This may be the wrong thing to ask but what percentage would you scale the plane up for a .35-.40. The article says you are at 250 sq inches, 500 would be too small for a .35 since it is a flying wing (maybe). What do you think? Any opinions?

Jim Thomerson · « **Reply #8 on:** October 10, 2011, 08:25:26 PM »

My Agile Arrow flying wing is 720 square in., well powered with a K&B 4011. I have the idea that a flying wing can carry a few more square inches than a comparable standard airplane.

Larry Renger · « **Reply #9 on:** October 11, 2011, 11:53:59 AM »

I really am not that good at estimating model sizes for "big" airplanes. I would look at the most competitive designs in that engine size and add 15% to the area. Since you don't have a big fuselage or horizontal tail, you can put that area back into the wing.

Once that is done, take the ratio off New Aera/Old Area and take the square root of that. This is your linear magnification requirement. When in doubt, go to the next wood size UP! It goes the other way scaling down.

Take a scale up to 600 sq. in. for example. 600/250=2.4, the square root is 1.54 so you have a 54% linear magnification. Anyway, that is the technique.

As far as structure, say you have 1/8" stock in the small model. Tines 1.54, that comes to .19" for the big one, so go to 1/4".

minnesotamodeler · « **Reply #10 on:** October 11, 2011, 04:35:11 PM »

Quote from: Larry Renger on October 06, 2011, 11:10:08 PM

Tim - I have plans for the Black Widow one. It is the mid-size version in the photo with 3 planes. Why re-invent the wheel?

Am I missing a page? I don't see any photo w/3 planes in it...only 1 photo of 1 plane, and a shot of the plans. I also don't see any trike gear...

Tim Wescott · « **Reply #11 on:** October 11, 2011, 05:28:17 PM »

Quote from: Larry Renger on October 06, 2011, 11:10:08 PM

Tim - I have plans for the Black Widow one. It is the mid-size version in the photo with 3 planes. Why re-invent the wheel?

PM sent. That should be the right size either for a hot-rodded Golden Bee that I have lying around, or for the electric motor by my elbow.

Larry Renger · « **Reply #12 on:** October 11, 2011, 11:45:43 PM »

I dunno, Ray. Look at the page numbers. I have several copies and they all have the photo of the 3 models. And yes the plans only show twin, not trike gear. The trike gear shows in several photos.

minnesotamodeler · « **Reply #13 on:** October 12, 2011, 06:48:56 AM »

Quote from: Larry Renger on October 11, 2011, 11:45:43 PM

I dunno, Ray. Look at the page numbers. I have several copies and they all have the photo of the 3 models. And yes the plans only show twin, not trike gear. The trike gear shows in several photos.

OK I see now, I'm looking at the latest "Half A Flyer" and your article on the "Kwikee Skyfire". Duh. Sorry for the confusion.

Larry Renger · « **Reply #14 on:** October 12, 2011, 10:15:28 AM »

So many designs, so little time!

George · « **Reply #15 on:** October 12, 2011, 03:56:19 PM »

Quote from: Larry Renger on October 12, 2011, 10:15:28 AM

So many designs, so little time!

I read the article and enjoyed the evolution process. I too enjoyed the old Larry Scarinzi design and went so far as to copy the full size plans from that issue of MAN, but still have not built it.

I think your statement above about covers it.

George

Paul Wescott · « **Reply #16 on:** November 03, 2011, 08:11:17 PM »

I just bought the mag. Nice article Larry! Congratulations!!! I'm just disappointed that none of my pictures were used. Maybe next time...

http://www.flickr.com/photos/star-paul-star/sets/72157627459246021/

Paul W.

Larry Renger · « **Reply #17 on:** November 03, 2011, 11:21:02 PM »

Had I known you had that photo, I would definitely have submitted it (with your permission, of course) That is the best in-flight photo of the model I have seen!

kenneth cook · « **Reply #18 on:** November 06, 2011, 04:23:44 PM »

Hello Larry, your article has really inspired our top stunt flyer in our club to want to build your plane. We reviewed the plane and plans for about an hour last week and today he was pretty excited to build it. Nicely done plane and article. Ken

Larry Renger · « **Reply #19 on:** November 06, 2011, 10:57:54 PM »

If you do the build, put the work here on the web for all to see! (Me, especially!!!

) Eric Rule has the files to laser cut all the parts if you want to go that route. (He actually laser cut the parts for the original, I have gotten lazy!)

john e. holliday · « **Reply #20 on:** November 07, 2011, 06:45:51 PM »

Yeah, laser cutting is doing that to us. Someone else does all the work while we benifit from it.

Larry Renger · « **Reply #21 on:** November 07, 2011, 07:52:14 PM »

The other side of the coin is that I can't begin to match the accuracy of a CAD drawn part cut with a laser. If you design a perfect fit, that exactly what you get. +/_ .0015 inch. When the spars don't fit the notches, I know it is the spar that is off dimension!