RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair  
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All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair
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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/21/2009 10:56 PM   
rt3232


 

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From: hastings, MN, USA
Status: offline 		Hi Barry

Have surfed all of my build pic's and could not find anything that would help, but in looking at the plan view of the wing (center of the manual) if you match every thing up as shown and parallel you should not have a problem.
Just remember measure at least twice befor cutting

Hope this helps

Cheers Bob T

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/21/2009 11:13 PM   
rt3232


 

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From: hastings, MN, USA
Status: offline 		Hi Chris

I had a vary simerlar problem earlier this spring with the NiMh batt's,  by not following the charge rate more closely and first peek charge conditioning.  I tryed to concition when I found the problem and could never get them to recover.
For what it worth I would start over with new packs.

Hope this helps

Cheers Bob T
Corsair Brotherhood #5

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/21/2009 11:55 PM   
wulf190



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Status: offline 		www.cheapbatterypacks.com   advertises on the site here. I got my last two packs from them.  Great prices and awesome packs I found.

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/22/2009 12:06 AM   
DaddySam


 

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Status: offline 		Finally decided I had to get to work on my Corsair.  I'm working on actuating the main gear doors via mini servos, and getting one door to work is easy its that second door that is driving me crazy!  I'm currently trying to cut some servo wheels into different shapes to see if I can figure out the correct geometry.  Mike, I know you did your doors with servos any tips?  
I've also decided to just get my Corsair done in the primer and fly it.  If (how can there be doubt?) it flies well and survives the maiden then I'll work on detailing it later.  I just HAVE to see it fly! 
I'll post my progress  as I'm able.  Heading off camping for the rest of the week.
Sam

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/22/2009 1:18 AM   
Fili



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From: Queensbury, NY, USA
Status: offline 		I'm looking thru my disks to see if I have any photos to help as well Barry........


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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/22/2009 3:13 AM   
wulf190



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Status: offline 		Heya Sam.

Probably the biggest thing to overcome is the pushrods to the horn I thought when doing mine.  I don't think it was near the fiddling doing a manual setup would have been for me.  I just used the BVM hinges with the horn on them and used longer arms on the servos with the pushrods all the way out at the end of them I think.  I have yet to connect the door servos to the rx and test them out honestly, so I'm sure I have more fussing ahead of me on setting travels and things like that.  Mine have to travel about as far as my doors will open to get the wheels out and still clear them on the way back in.  They do seem to work well just working the doors manually thru the servo travel though....so I should get snapping on my wiring and connections.  It seems like I should be able to dial them right in for travel from the TX to get it right.  Have been totally focused on getting my 109 in the air and chasing gremlins out of that at present.  Good luck and have fun.  I know the laser beam focus is necessary to get one in the air.

M.


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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/22/2009 3:30 AM   
dgrantham


 

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Status: offline 		Chris,

About those batteries.  THROW THEM AWAY!  Go with a good NiCad, or LiFe like the A123. 

It's never a good idea to fly a battery you are not 100% confident in.

David

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/22/2009 4:27 AM   
Zeeb



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quote:

ORIGINAL: dgrantham

Chris,

Go with a good NiCad, or LiFe like the A123. 

It's never a good idea to fly a battery you are not 100% confident in.

David


Far be it from me to suggest that A123's are not the definitive solution as that's what I've been using for awhile now...  

There are just too many advantages to those batteries to ignore, however there is something of a learning curve associated with using them and changing over right now on a model Chris has this much work into, may not be the best idea. They would most certainly not have any issues powering his winch servos for the wing fold but the need for a different charger, the fact that they cannot be voltage checked to see if they're up for a flight, the amperage restrictions associated with the standard servo connections to the rx and so on, all need to be addressed. 

So Chris, if you're up to doing some research you may want to consider the A123 solution if you have to go for new packs? The nominal voltage is just a bit over 5 cell NiCD or NiMH due to the extremely flat discharge curve, they can put out 30C continous and burst to 60C, charge in 20 minutes or so, no memory issues, very low self discharge rate and they won't blow up on you like a good quality Li-Po can and those are the only other battery type capabile of the discharge rates of the A123, but Li-Po's also require regulators for most installs.

Just a thought since David brought 'em up.


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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/22/2009 11:30 PM   
NCIS


 

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From: Janesville, WI, USA
Status: offline 		Speaking of batteries I need to run my 124" Corsair with two batteries and really don't know how to set that up so if one fails the other continues to produce power to avoid a bad incident. Now that there is a new AMA Experimental Radio Control Aircraft Program Requirements and Inspector Information Guideline book for model aircraft between 55 and 100lbs. If you don't build the model a certain way and meet the requirements an Inspector will ban your plane from flying. Anyway it says as just one of many requirements in this book that I have to have a dual battery system with a minimum of 3000 mah each. How do I do it and where can I get a good price on good battery packs that size. Perferably a low maintainence battery pack?

Anyone willing to help?

Barry
Corsair Brotherhood # 4
www.canopyrailsforwarbirds.com

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 12:37 AM   
Fili



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Status: offline 		Hey Guys, I'm getting ready to balance my Corsair. Wasnt there opinions here regarding moving the cg1/2 inch  forward of the reccomended area? I thought I saved the link, but I couldnt find it....


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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 2:32 AM   
rt3232


 

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Phil

Yep,  when I balanced mine I used 5 1/4 and it flies like it is on a rail, no bad habbits


Cheers Bob T

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 2:52 AM   
Thunderbolt47



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Status: offline 		Barry, You can try Hangtime Hobbies. They supposidly make some of the best packs. They can make any pack you want.
Kelly


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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 3:46 AM   
wulf190



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Status: offline 		 Here's the two packs I got from cheapbatterypacks.com.  The site is really easy to use, prices, selection and ability to select what you want is great.  I'm happy with them.  They seem to be some of the nicer packs I've had.

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 6:54 PM   
NCIS


 

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Status: offline 		Wulf and Kelly,

Thanks for the leads. I'll check them out. Do you have their websites by any chance?

Barry

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 6:58 PM   
tfarmer96



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Status: offline 		http://www.cheapbatterypacks.com/

thats where i get my packs from above is the link.

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 7:05 PM   
wingspar


 

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From: Sammamish, WA,
Status: offline 		"Speaking of batteries I need to run my 124" Corsair with two batteries and really don't know how to set that up so if one fails the other continues to produce power "

Here's what you need.....

http://aircraftinternational.com/catalog/power_box/index.htm

I'll bee using the 40/24.

These units isolate your servos from the reciever. No more worries about a stalled servo causing the receiver to reset due to low voltage. It monitors both packs and if one fails will switch to the stronger pack.

Dave

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 8:54 PM   
NCIS


 

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Status: offline 		Dave,

There are so many systems. How do I know which system I need?

Barry

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/23/2009 9:31 PM   
wingspar


 

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From: Sammamish, WA,
Status: offline 		It's just a matter of preferance. I'm using the $229 unit as I don't need all the bells of whistles of the more expensive units. Thay are also great for driving four servos ...flaps... off of one input. No loading down the receiver.

Dave

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/24/2009 5:45 AM   
warks62



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Status: offline 		Barry here is my 2C but I am sure people will dissagree. Warbirds just don't pull that much current. We hardly move our flite surfaces if we fly scale. The only surface that takes some abuse is the flaps when they are really hanging down. If you want back up use two heavy duty switches connected to two batterys. I like using the Hobbico 5 cell 4200ma ones. I always need the weight anyway plus if I go for two day event I don't have to charge. A Smartfly Battshare works well I know of several people using them. Basically you have two batteries each with there own switch. Then from the switch it plugs into the Smartfly Battshare then from there you plug into the reciever. The Battshare will run off both packs untill one gets too low or shorts out. Then it will take that one out of the system so that it doesn't draw the still good battery pack down. It has a light on the Battshare to let you know if something has gone wrong. You just have to have the light somewhere so that you can see it. Most likely somewhere out of the way on a scale bird. It is simple which is the way I like them.

http://www.smart-fly.com/Products/BatShare/batshare.htm

< Message edited by warks62 -- 6/24/2009 5:46 AM >

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/25/2009 1:31 AM   
cdohaney


 

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From: stephenville, NL, CANADA
Status: offline 		Hi guys,

Foir those of you using a G62, what size prop and what RPMs are you getting? I am using a 22x10 and getting around 5200. This seems rather low but before I start tinkering with needles and different props, or possibly having to modify my exhaust, I like some reference as to what I should be aiming for.

Chris
Corsair Brotherhood #38

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/25/2009 1:47 AM   
crashproof


 

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Status: offline 		Hey Chris that really seems low. I would think you would atleast get near 7000 rpm with a 22-10. I use Zinger 20-8-14 props with my G62 and get around 6800 to 6900 on the ground. I am using the bennett side dump exhaust. Kevin.

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/25/2009 2:17 AM   
cdohaney


 

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Status: offline 		Yeah, I think my custom exhaust is too restrictive. I will try a 22x8 and/or lean out the high speed needle to see what I can push it too, but I think I may need to modify the exhaust....DOH!!!!

Chris
Corsair Brotherhood #38



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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/25/2009 5:39 AM   
Thunderbolt47



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Status: offline 		Chris, I'm a G-62 owner also, and those are low numbers. Also I believe the exhaust is your problem. There are two many 90 deg. turns, and to small of pipe. Most scale exhaust will be restrictive though. ( nature of the beast)
An engine is basicly an aircompressor. The faster you can move the air out, the better.

Kelly


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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/25/2009 3:19 PM   
F4u5



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Status: offline 		Barry...I recommend 2 receivers on your 124 inch Corsair with 2 batts per Rx with some sort of isolator running a separate battery.

Jeff

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RE: GROUP BUILD - Top Flite Giant Scale F4U Corsair - 6/25/2009 3:57 PM   
wingspar


 

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Status: offline 		Isn't using the 2.4 GHZ new radio really two internal receivers already? Or am I wrong. And then coupled with a powerbox achieves duel batteries that are isolated from each other for a failsafe. It further protects the receiver from servo voltage fluctuation and possible low volatge rest.

Dave

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