CG for 96" Lazy Ace,Bi plane ???? (Full Version)

All Forums >> [RC Airplanes] >> Aerodynamics



Message

Heli-Jumper -> CG for 96" Lazy Ace,Bi plane ???? (10/11/2007 3:06:33 AM)

I purchased a Lazy Ace 96 inch bi-plane. Both wings are 96" and the top is forward of the bottom. Where would the CG be??

I could use some help here. Thanks

you can post here and email me at smacksX5@cox.net too.

Thanks, Scott



highhorse -> RE: CG for 96" Lazy Ace,Bi plane ???? (10/11/2007 8:19:32 AM)

It's not hard to calculate...but I don't know specifics of the planform.

Tell me more so I can help.

Are the wings swept? Do they have the same planform? Are the chords for both wings constant?
Span doesn't usually matter, but I defnlty need the exact measurments for the chord.


U can respond here, PM me, or call 901-527-7272, we can knock this out pretty easily.

Don.



Rodney -> RE: CG for 96" Lazy Ace,Bi plane ???? (10/11/2007 5:22:51 PM)

On mine, balance is on leading edge of lower wing. Very stable, could probably be moved back a tiny bit.



da Rock -> RE: CG for 96" Lazy Ace,Bi plane ???? (10/11/2007 7:46:31 PM)


quote:

ORIGINAL: highhorse

It's not hard to calculate...but I don't know specifics of the planform.

Tell me more so I can help.

Are the wings swept? Do they have the same planform? Are the chords for both wings constant?
Span doesn't usually matter, but I defnlty need the exact measurments for the chord.


U can respond here, PM me, or call 901-527-7272, we can knock this out pretty easily.

Don.



It's quite kind of you to offer personal guidance, but forums are really about openly sharing info in public so everyone benefits. When the subject line sets up the topic, and the posts in the thread develop it to a good answer, or better yet a number of good answers, everyone learns and benefits.

If the topic catches your interest and you open the thread to read, looking forward to good info, and the thread stops cold because it went offline, that sucks. And how many forums would stay in business if all the threads ended with a phone number advertisement.



highhorse -> RE: CG for 96" Lazy Ace,Bi plane ???? (10/11/2007 10:01:08 PM)


quote:

ORIGINAL: da Rock


quote:

ORIGINAL: highhorse

It's not hard to calculate...but I don't know specifics of the planform.

Tell me more so I can help.

Are the wings swept? Do they have the same planform? Are the chords for both wings constant?
Span doesn't usually matter, but I defnlty need the exact measurments for the chord.


U can respond here, PM me, or call 901-527-7272, we can knock this out pretty easily.

Don.



It's quite kind of you to offer personal guidance, but forums are really about openly sharing info in public so everyone benefits. When the subject line sets up the topic, and the posts in the thread develop it to a good answer, or better yet a number of good answers, everyone learns and benefits.

If the topic catches your interest and you open the thread to read, looking forward to good info, and the thread stops cold because it went offline, that sucks. And how many forums would stay in business if all the threads ended with a phone number advertisement.


It's an involved and potentialy complex topic and IN THIS CASE would be more quickly and accurately, and conveniently conveyed on phone, had the poster so opted.

I post and share regulary in several threads. How I or anyone else interacts in response to any topic posted by someone other than yourself, however, is not your concern and not grounds for your admonishment in any way, shape, or form.






da Rock -> RE: CG for 96" Lazy Ace,Bi plane ???? (10/11/2007 10:28:37 PM)

quote:

ORIGINAL: highhorse


quote:

ORIGINAL: da Rock


quote:

ORIGINAL: highhorse

It's not hard to calculate...but I don't know specifics of the planform.

Tell me more so I can help.

Are the wings swept? Do they have the same planform? Are the chords for both wings constant?
Span doesn't usually matter, but I defnlty need the exact measurments for the chord.


U can respond here, PM me, or call 901-527-7272, we can knock this out pretty easily.

Don.



It's quite kind of you to offer personal guidance, but forums are really about openly sharing info in public so everyone benefits. When the subject line sets up the topic, and the posts in the thread develop it to a good answer, or better yet a number of good answers, everyone learns and benefits.

If the topic catches your interest and you open the thread to read, looking forward to good info, and the thread stops cold because it went offline, that sucks. And how many forums would stay in business if all the threads ended with a phone number advertisement.


It's an involved and potentialy complex topic and IN THIS CASE would be more quickly and accurately, and conveniently conveyed on phone, had the poster so opted.

I post and share regulary in several threads. How I or anyone else interacts in response to any topic posted by someone other than yourself, however, is not your concern and not grounds for your admonishment in any way, shape, or form.



Lighten up.
As a moderator, every one of us is greatly concerned about a great number of things. We've been given a list of them, as a matter of fact, in case we hadn't thought of all the things that RCU wishes for us to police.
As for my post being an "admonishment", it was my opinion and you've missed my motives for it. You may have missed that your post is completely intact.

Moderators often delete and edit posts. You have already experienced both, so you know. And how the poster is interacting, and how pertinent the content of the post is to the topic, are two concerns, btw. And as unfair as it might appear to anyone else, we have the bully pulpit.

It certainly is true that the topic of biplane CGs can be difficult, but even difficult topics deserve further discussion.

Speaking of further discussion. Any in this thread that is not about the CG for biplanes or somewhat associated with it will be deleted. Off topic........



BMatthews -> RE: CG for 96" Lazy Ace,Bi plane ???? (10/12/2007 2:25:23 AM)

A rule of thumb that someone posted would work in this case. The Lazy Ace is constant chord and has no sweep so what you can do is from a top view take the forward most leading edge and the rearmost trailing edge. The horizontal distance between them is your "chord" for this rule of thumb setup. Put the CG at 27 to 30% of this phoney chord and then go fly. It'll be close enough to safely fly the first couple of flights and get your bearings. From there fine tune to suit your own desires.



rglass1144 -> RE: CG for 96" Lazy Ace,Bi plane ???? (11/14/2007 2:16:30 PM)

How do I find a 96" Lazy Ace kit?



wvarn1957 -> RE: CG for 96" Lazy Ace,Bi plane ???? (11/15/2007 12:09:13 AM)

http://www.kitcutters.com/ They offer several different sizes up to a 120" from full kits to partial kits.



rglass1144 -> RE: CG for 96" Lazy Ace,Bi plane ???? (11/15/2007 12:56:40 AM)

Yes I see that kitcutters offers the entire or patial kits but they do not include plans. If I build I will need a plan and also written instructions. I can cut the parts myself. I have an old Lazy Ace 76" that I built over twenty years ago. Maybe I will just recover the airframe and install a new engine and radio and fly it. Although the 120" Lazy Ace would be very cool with a RCS radial engine on it. Ah but then I would need a trailer and someplace to store all of this stuff. And maybe a part time job to help finance a project like that. Then would I have time to fly? I think I will just stick with my old 76" model. I will have plenty of time to work on it over the winter up here in Minnesota. The temperature is allready down into the thirties up here. ISH!! Thanks for the tip about kitcutters. Last winter I built the twelve foot telemaster and I had a ball flying it this past summer. Thanks again.

Bob



Heli-Jumper -> RE: CG for 96" Lazy Ace,Bi plane ???? (11/15/2007 2:24:50 AM)

My kit was built and a bit older. The plane fly like a trainer, all the local guys love it. She's big. 35Lbs, I have a Brison 4.8/78cc twin on the front. Sweet!

Scott



OLD_SLOW and in the WAY -> RE: CG for 96" Lazy Ace,Bi plane ???? (11/19/2007 9:19:19 PM)

in 1995 we built 6 of the 96" Lazy Aces for our AMA air show team "Tidewater Taildraggers" it was quite a sight seeing 6 of those in formation and synchronized aerobatics, we used headsets to coordinate the stunts.
we carried 32oz of smoke fluid in the nose along with 32oz of fuel just above it.
our cg was set (empty) at the front bolts of the top wing which is right above the lower wing leading edge. Ours were g62 powered swinging a 22/6/10 prop. mine was the last standing after 9 years with over 400 flights and countless shows. they are great planes, big enuff to be seen by the crowd and and with increased throws (single lower wing ailerons) are capable of (three mistakes high) inverted flat spins lomcevaks etc etc. the old girl was gettin a bit shaky so she was retired to a full sized planes hangar dangling from the rafters, for ever in flight...sniff sniff



TJR1 -> RE: CG for 96" Lazy Ace,Bi plane ???? (5/12/2008 5:55:48 PM)

I belonged to a club while stationed in MO, and one of the guys there had one. It would get off the ground in less than 10 feet! Less than 5 in a breeze! I always liked that plane.[:D] I may have to order one in the near future.[;)] Seeing 6 of them in formation would be truly exciting. Do you have any photos or video?



gboulton -> RE: CG for 96" Lazy Ace,Bi plane ???? (5/12/2008 6:07:33 PM)

I've never encountered a bipe yet that wouldn't survive its first flight with the CG simply set on the top wing's spar at the center joint.

Might not be ideal, might need to be moved, might need to be on your toes...but it'll fly, and get back down, and you'll have somewhere to go from there.



Page: [1]

Valid CSS!




SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.
0.3125