erniehughes

My Feedback: (3)

Hey, I just bought an 80" CAP 232 at Perry. I downloaded the book since I didn't get one with the purchase. The book I downloaded says to balance the model 5-1/4" - 4-1/8 inches back from the leading edge measured at the fuselage. Is this a misprint? This seems too far forward. I have a Fox 3.2 engine and the receiver battery mounted mid tail and it puts the CG way too far to the rear. I figured with that engine I would need the weight back a bit.

It looks funny in the book since they listed the larger number first.


Ernie

3D_CAP232

Hi,
I got a 88" cap and it balances at 6" from the LE.
Hope this helps...btw what make of Cap is it?

erniehughes

My Feedback: (3)

It is a Hanger 9 ARF..



I just finished moving the receiver battery up front and it is with 1/4" of the most rear CG recommended. I am going to fly it tomorrow and see what happens. I think it will be ok. After posting I read where some are flying at 6-1/4", mine is 5-1/2".

Thanks for your input.

Ernie

MHawker

My Feedback: (16)

So far, from what I've seen in different planes, it seems like CG's are around 25-30% of the chord. And that usually puts it pretty close to the spare, if not right on. Check your CG using that measurement and see how that looks.

FYI, my 72" Extra's CG is about 4.5"-5" back from the leading edge.

Mike

davham

My Feedback: (4)

They changed the cg range!!!!

In my manual it states 6--7 1/8
I'm at 6 1/4

The change on horizons site shows 4 1/8--5 1/4

What gives?

erikm

My Feedback: (2)

My H9 80" CAP is 16 3/4 pounds. It has a Brison 3.2 with Slimline pitts. The manual states CG should be anywhere from 6 1/8" to 7" from leading edge measured at the fuse. Mine is at 6 1/2 and flies beautifully. I wonder what caused them to change the specs????

Erik

erikm

My Feedback: (2)

Wow,
I just checked the downloaded PDF manual and am totally confused! I will call them (horizon) on monday to see if I can get a straight answer. The PDF manual states "(5 1/4" to 4 1/8")".

Erik

erniehughes

My Feedback: (3)

I just moved the battery up front, but in light of what you guys are saying, I think I will move it back where I had it, which puts it on about 6-1/4". What do you think, I want to fly it tomorrow??

Ernie

erikm

My Feedback: (2)

Ernie,
I'm flying mine at 6 1/2 right now and it is not a handfull! It slows down beautifully and performs excellent 3d. The only thing I changed from the PRINTED manual's recommendations is that I added more throw on low rate rudder to sustain normal knife edge flight- that's it.

Erik

erniehughes

My Feedback: (3)

Ok, The reason it took me so long to get back to you is, that I was out in the shop moving the battery back to the original place, which makes the CG around 6-1/4" Tomorrow is the test.

I want to get this plane going so I can take my 1/3rd scale CAP out of service to try to fix the engine. It is a Brison 4.8 and it misses like you are turning the ignition on and off on verticals. On the ground it runs good. I want to possibly send it to Brison to see if they can figure out the problem.

Enough already,

Thanks,
Ernie

davham

My Feedback: (4)

erniehughes,

Please let us know how it turns out.

The cg thing is interesting, cant imagine moving it an inch forward on my plane.
Actually I'm thinking of moving mine 1/4 more rearward to get rid of some of the down required to maintain inverted flight.

Dave

erniehughes

My Feedback: (3)

I flew about 4 tanks through it. I agree with you on the down it requires to maintain inverted. However I had a couple of uncommanded quarter snaps while pulling out of dives. It is also pitch un-stable on landings even with 30% expo on low rates. My low rates are about 1-1/2" up and down measured at the rudder end. Other than those problems, it does a really nice flat spin, water falls and knife edges ( I am using way more than the recommend rudder travel on low rates). As a matter of fact I just left the rudder on high rates and added expo. One unique thing it does, when you do a hammer head, if you use too much rudder it does a water fall, don't ask!! Over all it flys good, not as good as my 1/3 scale though. I think I will put a smaller battery on my receiver. That will lower the weight a little and move the CG forward a bit. Hope this dribble helps a little.

Ernie

h82crash

Ernie,Don't mess with your CG! Just reduce your throws. 1.5" is WAAYY TOO MUCH!. About half that will still give tight radius loops and will smooth out the flight. I have a Midwest Cap (same plane) and my CG is at 6.25" and it flies great! As a matter of fact, gonna move it back some more (previous owner had it at 7" but I was skeptical). The key is to reduce the throw on elevator until it doesn't snap when you yank it back. Then on high rate give it all for 3D. Tom.

hooverin howie

That's a misprint. My instructions from Midwest says 5 3/8 - 6 3/8 from the LE of wing by fuse. I shot for the mid.

hooverin howie

That's a misprint. My instructions from Midwest says 5 3/8 - 6 3/8 from the LE of wing by fuse. I shot for the mid.

kstinman

My Feedback: (1)

There were lots of mistakes and misprints in that manual and the original and the one on line are conflicting in areas.

The right measurements on balance are the 6 1/2 from leading edge.

There is a lot of information on this plane in a different earlier thread.

http://www.rcuniverse.com/forum/m_59..._1/key_/tm.htm


Good Luck,

HLC [&:]