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Old Jul 25, 2010, 01:20 PM
AltonMan is offline
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My middle name is Alton
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The Yeti - a new pusher prop design


I have always liked pusher prop planes. My first RC plane was a Hobby Zone Firebird Phantom - a fun plane, but not durable at all. I got a couple of month use out of it.

Introducing the Yeti My own design. Please feel free to comment, critique or criticize. I started designing it yesterday afternoon, so it's very much a work in progress.

I have already made a number of changes.

-Wings- I made them narrow so the fuselage didn't have to be long. I used wings I had built for a BluBaby 33 (another great plane ) and trimmed them down length wise. I used bamboo skewers on the leading and trialing edges for support, but the wings were very bendy. I added a Kf strip to the front of each wing, and gave the wings acceptable strength.

-Power System. I currently am using a 2204 14t from Grayson Hobby I was using a 2 s lipo, but it was a little underpowered on an GWS 8x4 Slowfly prop. Toward the end of the day, I switched to a 500mah 3s - more than enough power, but pushing that motor's limits on an 8x4. I will try an 7x38 dd prop and see how it does. I experiment with the thrust angle of the motor, and have it set pretty parallel to the boom. Seems to be a good angle.

-Elevator. I don't know what I was thinking with my first elevator. It was only about an inch wide and on my maiden, I could not pull up at all (You can see that in the video posted below)

Yeti - a new pusher prop design RC plane (4 min 23 sec)
Last edited by AltonMan; Aug 05, 2010 at 09:36 PM.
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Old Jul 25, 2010, 06:39 PM
Lestertrece is offline
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the airplane's quality seems low. i think with more effort, you could make a better airplane, but i respect that you are just trying to have some fun

happy?
Last edited by Lestertrece; Jul 26, 2010 at 08:44 PM.
Old Jul 25, 2010, 06:42 PM
darksiede is offline
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Foaming at the mouth..
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Originally Posted by Lestertrece View Post
wow, that looks like it was sloppily made, huh?
-SNIP-

Seriously?

I'm at a loss.. and this is beyond reproach.. consider it reported..
Old Jul 25, 2010, 07:46 PM
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Quote:
Originally Posted by Lestertrece View Post
wow, that looks like it was sloppily made, huh?
did you actually try?
i mean, really, whats up with the airfoil? laziness is the answer.
and the fuselage looks poorly constructed. and ya know my planes are better, check them out. like my new "elephant" . its a beauty. thanks
Who cares what it looks like, its how it flies.
Old Jul 25, 2010, 09:42 PM
Rusty-Gunn is offline
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The guy did ask for all to criticize, didn't he? We are all entitled to our personal opinions. I don't see the need to report this at this time, maybe if it gets worse.

The plane does look decent enough to please. Good luck.
Old Jul 25, 2010, 09:51 PM
TheTrashMan is offline
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Originally Posted by Lestertrece View Post
wow, that looks like it was sloppily made, huh?
did you actually try?
i mean, really, whats up with the airfoil? laziness is the answer.
and the fuselage looks poorly constructed. and ya know my planes are better, check them out. like my new "elephant" . its a beauty. thanks
wow!!???Realy??
Old Jul 25, 2010, 10:18 PM
AltonMan is offline
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Great weather here today. Got to spend more time with the new plane. Uploading a new video to youtube -251 minutes remaining lol.

I did invite criticism, so I can take Lestertrece's comments. I'm not building kits for sale or anything like that - just messing around with a plane to fly in my backyard. I want to try different motors and wings on it. I am also planing on making some floats - I think the Yeti would be a good platform for water flying.

Lestertrece didn't link to his "elephant" build - It can be seen here https://www.rcgroups.com/forums/show....php?t=1280988
Old Jul 26, 2010, 02:30 AM
AltonMan is offline
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The Yeti RC Plane - Day 2 (Part 2) (5 min 32 sec)
Old Jul 26, 2010, 02:57 AM
jclassic1 is offline
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This small plane looks fine to me,if you want to see scruffy builds check some of mine out.It does seem to fly a little bit faster than I would like with a plane this size and I would probably give it a bit more wing if I were to build one.I can,t say I am a great lover of pusher planes but they are more user friendly and better for trainers.

Good luck with it.

John
Old Jul 26, 2010, 08:58 AM
Azarr is offline
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RIP Azarr - "Old age is not for sissies"
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Quote:
Originally Posted by Lestertrece View Post
wow, that looks like it was sloppily made, huh?
did you actually try?
i mean, really, whats up with the airfoil? laziness is the answer.
and the fuselage looks poorly constructed. and ya know my planes are better, check them out. like my new "elephant" . its a beauty. thanks
Constructive criticism is normally welcome, rudeness is not. Maybe you should investigate KF airfoils?

Beauty is in the eye of the beholder. Personally I like the relatively clean lines of the Yeti.

Azarr
Old Jul 26, 2010, 09:58 AM
goldguy is offline
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flyin' fool
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If your having fun, that's what counts. I like the look of the design and you did a reasonable job in getting it airborne, better then some of my FBs turn out.

As for the rude comment from Lester, I can be rude too...............his Elephant looks like a piece of crap, he has absolutely no building skills and should take up stamp collecting as a hobby instead because he knows absolutely nothing about model design.
Old Jul 26, 2010, 10:08 AM
Azarr is offline
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RIP Azarr - "Old age is not for sissies"
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Thanks Gold, I was trying to be subtle, but it was probably lost on Lester.

Azarr
Old Jul 26, 2010, 02:29 PM
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you know what's funny is that Lester's plane isn't looking much better!

- Jeff
Old Jul 26, 2010, 03:28 PM
A74Charger is offline
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Balsa taste like chicken!
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I like it. My prototype planes are always rough looking. It's when you finish the prelim flights and tinkering that you make her all PURDY! I may have to make one, and I bet mine'll look alot worse. As long as she's airworthy (Won't come to pieces) during flight.


Now, How does she fly? stable? stall behavior? Charger
Old Jul 26, 2010, 03:59 PM
AltonMan is offline
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Hi, thanks for the comments guys. Jclassic1 is right about it being too fast. It does fly fast, probably because the wings are only 33 inches (from a Blubaby 33) only with a much smaller chord (4 1/2 inches).

The plane flies great at speed, but does not glide very well. On landings it has to come in pretty fast. I think it's design with a flat bottom makes it well suited to be a float plane, except I would be pretty scared to land it at such high speeds on water.

The challenge I face is making it more floaty, but that's going to be difficult without making the wings wider (chord). I I think I might try to lengthen them like a Radian, or I was thinking about making some swept back wings like a B52's.


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