55% Mighty Mini Fogey

[Gramaphobe]

Got a PDF file now! (that is the right size)

I have had the most success building without paper using CA or some other lightweight glue.

Also, i built a second wing that was standard dihedral and much less than the standard guage.

View attachment myminifogey2.pdf

First post here so hi! And be gentle!

I really like the mighty mini series, i have a 18"dart(ft flier) thats going on 5 years old now! The 10g motor from hobby king is great with the turnigy 6a esc.

I built the mini speedster per the build video and got mixed results. At 135g it was a little porky for the 10g on 2s, it did much better on 3s. I went ahead and built a second speedster without the paper and used bsi thick foam safe glue and shaved 40g off! This thing came to life! What a wonderful little plane. I had so much fun in the common area of my apartment complex. It was still a hand full at times but I want something my girlfriend and her son can fly. She has built and " buddy boxed" an old fogey with me, so... why not a mini fogey?

A good friend of mine has access to a place called " Dallas Maker Space". Any hobbyists in the dallas/fort worth texas area needs to check this place out! Cnc machines, 3d printers and best of all, a laser cutter! So begins my leap into 3d modeling.

After quite some time I managed to recreate the ft old fogey and create a 55% version that fits the mini power pod and uses the exact same wing as the mini speedster. My buddy at maker space converted my files into lasser cutter friendly files and poof! My mini fogey is born!

I maidened it today in what felt like 10+mph winds and it did ok accept it had this wierd pendulum effect going on. The battery is a good 25% of the weight of the plane and its mounted as low as possible inside the airframe.

My question, can you have too much weight too low on a RET dihedral type plane. Should I try more or less dihedral?

Also, should I share my mini fogey or keep it for personal use. I dont want to step on any FliteTest toes. Ive never claimed this to be my design or sold for profit nor do I intend to. Just a lil impatient... and I learned alot in this process!

Also, also...

Plane info...

Dtfb, hextronic 10g, turnigy 6a 6g esc, 3.7g servos, orange 4ch reciever...

460mah 2s rhino with gws 7x3.5 used for maidens

360mah 3s rhino with gws 6x3 is balistic!
Both bats weigh within 1g of one another

Mini speedster with paper and hotglue = 135g

Mini speedster no paper and ca = 95g

Mini fogey with paper hot glue = 130g

Mini fogey no paper and ca = 97g(unmaidened)

Trouble uploading pics, maybe later.

 

[Ron B]

I'm waiting on pics
Welcome to the forum

 

[Gramaphobe]

File size is 2.6mb, maybe too big?

 

[Gramaphobe]

Pics... got it!

 

[SP0NZ]

Nice work on the mini fogey! Oh yeah, and welcome to the Flite Test community.

 

[Gramaphobe]

Ty!

Any ideas on this extreme pendulum effect!

 

[Michael9865]

Nice plane. Subscribed

 

[Gramaphobe]

Few more pics...

One of the sketchup model and one of the printed pdf plans.

I had to do a screenshot of the picture on my phone to make the files smaller, sorry. How can I reduce file size of a pic on my phone without retaking the pic?

 

[Ron B]

reduce the polydihederal a little and see if different speeds make a difference as the full size liked some speeds better than others.

 

[Winglet]

I've NEVER been able to get that weird pendulum effect completely out of my regular sized one. I think the solution is probably a completely new wing without the polyhedral.

Mike

 

[Gramaphobe]

Im thinking dihedral instead of poly maybe?

 

[Christopher14]

That should work.

 

[aiidanwings]

Do you mean a side to side rocking?

The fault with the fogey is the fuselage is too tall. For the full size, I've reduced the height by 2 inches and the mini by 1.

 

[ClearSkiesCalmWinds]

aiidanwings can we see pics of them?

 

[Kevinbennett126]

Do you mean a side to side rocking?

The fault with the fogey is the fuselage is too tall. For the full size, I've reduced the height by 2 inches and the mini by 1.

That's very interesting, my Old Fogey did that too - so much that it was almost un-flyable. It helped when I increased the fin height but didn't stop it.
So where in the fuselage did you lose the 2inches of height ? .... I guess in the cabin area ?

Kevin.

 

[aiidanwings]

That's very interesting, my Old Fogey did that too - so much that it was almost un-flyable. It helped when I increased the fin height but didn't stop it.
So where in the fuselage did you lose the 2inches of height ? .... I guess in the cabin area ?

Kevin.

Yeah, basically just lowering the wing.

 

[Gramaphobe]

Can we see a pic of this short fogey?

 

[aiidanwings]

I'll post a pic tonight.

 

[Gramaphobe]

Im trying to picrure this change in my mind and why/how it helps. Is it putting the wing in the prop wash that helps? Maybe its raising the cg higher, not so far below the center of lift for less pendulum effect. Or have the tail feathers somehow moved arround in the propwash?

Sorry, im not the kind of person that just wants an answer and the problem fixed. I crave the knowledge of why, how... just because and magic are not acceptable answers!

Guess I could try mounting my battery higher up for less pendulum...

 

[aiidanwings]

I think its the fuselage side area amplifying turbulence from the prop wash disturbing lift from one or more wings.