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New 81" P-47 ARF coming from Hangar 9

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Old 11-23-2007, 01:40 PM
  #2526  
G-Pete
 
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Default RE: New 81" P-47 ARF coming from Hangar 9


ORIGINAL: Tisoy909
G-pete, I really enjoyed your last video, you've done an awesome job on that captured p-47 scheme, and your method of doing c.g. balancing is really nice. where can i get a balancer like, that, it looks almost custom, did you make this yourself?
Yes it is a custom made by me. All the CG stands out there are not big or practical enough for this size bird. (ya ya I know! There is one out there but that thang cost $238 PLUS shipping --- naaaah to much!).
Anyway I thought i make one which fits all the birds. This is the prototype, I see some improvements but in general this stand works.
As you can see in the pictures there are safety pins in there, you can sit the airplane down and even when you miss the CG far off the plane do not a flip and fall off the stand/bench.
So that "Honey come here please and give me a hand..." you don't need anymore (at least by balancing the plane).
May in 2 weeks you will see some in the for sale section.....

happy landings

G-Pete

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Old 11-23-2007, 01:48 PM
  #2527  
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Default RE: New 81" P-47 ARF coming from Hangar 9

G-Pete,
Well its definately nice, and yes i believe ive come across that expensive one you mentioned, and no theres no need to spend that much on a balancer, youre right i also find it hard to use my incidence meter on this huge wing as well. Count me in for the balancer once you have some available id really like to have that one, provided its not going to be $238 dollars . Curious if you had some other videos of the p-47, okay thanks again, and happy shopping day too.
take cares.
Louie
Old 11-23-2007, 01:52 PM
  #2528  
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Default RE: New 81" P-47 ARF coming from Hangar 9


ORIGINAL: Flyjets
Just use your fingertips and use the stock CG for starters. The plane is just about perfect at this location.
Ian
Ian,

fingertips alway worked, that's true. Here is a method i use - I read about it some time back. Just cut some triangular stock,I prefer 1/2inch and tape it on with light sticky tape (masking tape) on the wing.
First you don't have to bent down and look for your marks, second they can stay as long you want, third you don't have to lift your bird in an awkward position. On the bench you lift the plane only 1-2 inches and you see if the bird is balanced. Again no help needed....."Honey would you....."

This method i use on my disco birds (aerobatic airplanes). The masking tape make it possible to change the CG fast on the field...

Happy landings

G-Pete
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Old 11-23-2007, 02:02 PM
  #2529  
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Default RE: New 81" P-47 ARF coming from Hangar 9


ORIGINAL: Tisoy909

G-Pete,
Count me in for the balancer once you have some available id really like to have that one, provided its not going to be $238 dollars . Curious if you had some other videos of the p-47, okay thanks again, and happy shopping day too.
take cares.
Louie
I don't have to sell that CG to make a living....

Terry and I we have more videos in the works, I had two ATC 1000 mounted on the bomb spots. The vibration made then shut off, this will be fixed. Also we have a black widow system this will be installed on a KMP 109. So you have a forward looking camera a camera to the back. The back camera sees the 109 and 109 dogs the 47 --- what a thought!
We need to get the bugs out of the ATC"s the back widow works great...stay tuned. Thanks

Happy landings

G-Pete
Old 11-28-2007, 09:04 PM
  #2530  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Has anyone ever put a ys engine in this airplane? I have a ys 140 looking for a home and really like this plane. Would this engine have enough power? Sorry if this was already covered in the earlier 100 pages of this forum.
Old 11-28-2007, 09:09 PM
  #2531  
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Default RE: New 81" P-47 ARF coming from Hangar 9

I think a YS 140 would do it justice
Old 11-29-2007, 12:01 AM
  #2532  
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Default RE: New 81" P-47 ARF coming from Hangar 9

I disagree, I have an Evolution 35 in mine and I would not call a YS 140 and that comparable. Remember those that used the G-26 wish they had more power. This is a heavy plane at 16-18 lbs. JMHO but you should read the thread and listen to all of the discussion over motor choice before making a desiscion.

R/C Foolish
Old 11-29-2007, 08:38 AM
  #2533  
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Default RE: New 81" P-47 ARF coming from Hangar 9

I used a G-26 and it flew very scale-like
Old 11-29-2007, 10:07 AM
  #2534  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Let's not get into this argument again, but myself and a few others that started out with the G-26 all agree the plane COULD use more power and switched to different power options. The G-26 is fine if you just want to fly in circles but it gives you nothing extra if you get into a situation where you need to power out. We have gone over this before, why let people struggle with marginal power? The YS-140 would probably fly it but have nothing to spare, so why take a chance?

R/C Foolish
Old 11-29-2007, 10:18 AM
  #2535  
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Default RE: New 81" P-47 ARF coming from Hangar 9

What's wrong with flying a plane with an engine that provides enough power?

If he HAS a YS 140 and he WANTS the P-47, and he DOESN'T want to buy another engine, then I say, "Go 4 it"
Old 11-29-2007, 10:55 AM
  #2536  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Let's ask this question, how many guy's are flying this plane with a G-26 or simialr gas or a glow of smaller size than a 180? And if you are, are you happy with the performance of the Hangar9 P-47?

Let's see what type of anwers we get.

R/C Foolish
Old 11-29-2007, 11:03 AM
  #2537  
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Default RE: New 81" P-47 ARF coming from Hangar 9

I have run plenty of YS engines, and they are capable of quite a bit more than people give them credit for. I personally have a 50cc in my 47, but if I'd had a spare 1.40-1.60 YS, I might have installed it just so I could get the bird up and check things out. Knowing my history, I know I wouldn't have been content with this if it were me, but who cares what I think? This guy might love how it flies and sounds with the YS in it. If it doesn't work out for him, he can pull it and put something else in.

Unless you are glued to glow engines....that YS would sell easily on here, and for the money you get, you could turn around and get a brand new and very powerful 50cc gas engine that will work wonderfully in the plane. If you'd rather fly it slower, that's what the left stick is for. If you are around others with overpowered racers...again, left stick

Chad
Old 11-29-2007, 04:59 PM
  #2538  
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Default RE: New 81" P-47 ARF coming from Hangar 9

I fly mine with a G26 and I really enjoy it. Fly only in circles, I don't think that is any where near accurate. I have read about how you lost one on takeoff and I am sorry for you that it happen but the G 26 power did not cause it. If it was not propped right or tuned properly or it was taken off too soon I guess it could but so could any engine. Warbirds are meant to rollout and take off and climb out not to go 30 feet and jump into the air. Will the 180 or the G26 fly this plane and do large loops, rolls, and scale Warbird man. absolutely it will, as I have flown it very well with both. Will it do 130 mph? no it won't. It is however unfair to continue to state it can only fly in circles when actually it does much better than that. Kevin.
Old 11-29-2007, 06:29 PM
  #2539  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Thanks for all of the input. I figured that since the test videos that I saw were powered with a 180 that my 140 ys would do just fine. (I have heard that ys engines are more powerful than they have stamped on them). I will try to build this plane as light as possible and then fly it with the 140. If I enjoy warbird flight I will upgrade engine and make this plane more scale.




Thanks for the quick replies,

Mike
Old 12-03-2007, 08:52 AM
  #2540  
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Default RE: New 81" P-47 ARF coming from Hangar 9

...just quick to power: Most ratings are not accurate because they are made from the manufactures under absolute best conditions.

Anyhow, for me is not important the HP rating - I look only how big are the prop is what this engine can turn at which RPM.

The YS 140 supposed spin a 17x8 with 9000 rpm. lets say you put a 16x8 on it @ 9000rpm is that 15.02lb thrust, plenty to get this bird of the ground. Ergo: it will lift this airplane of the ground and fly in circles. Do not expect not more - but not less.

The most owners put a Evolution 35GT2 in it, the midrange prop is a 20x8 and will be spun easy @ 7500rpm which results in 25.47lb thrust. Hangar9 recommend as smallest engine a 1.20 four stroke...woo hoo that's a tad to small for my taste.

As you can see looking at some numbers can make a decision easier . Just keep in mind, to keep up with a .40 size trainer like an avistar you have to fly full throttle....

Happy landings

G-Pete
Old 12-03-2007, 10:52 AM
  #2541  
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Default RE: New 81" P-47 ARF coming from Hangar 9

G-Pete,
Just wanted to ask, bout how much down thrust did you recommend for the Jug? not sure, if it was you, but someone suggested just adding this with a couple of washers sandwiched in the mount, i was looking and thought i can also create downthrust by placing washers between motor mount and motor as well. thanks for your help, i got my cg issues squared away and still haveng maidened yet but gotta do it soon, geez 25 pounds of thrust with the evo35 i cant wait!
Old 12-04-2007, 10:59 AM
  #2542  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Tisoy909,

I did not see anything wrong with the thrust line of the aircraft. I did not see any bad characteristics in the throttle up or throttle down.
Even on high speed no excess down elevator.

I think the thrust line is there where it belongs...

If you are still not sure, fly your airplane without the dummy engine in place. Then if you like it (I'm sure you will..) install the dummy...engine.

Happy landings

G-Pete
Old 12-04-2007, 06:20 PM
  #2543  
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Default RE: New 81" P-47 ARF coming from Hangar 9

For tisoy and g-pete. I've seen blogs before of others complaining about using a lot of down elevator. I had a similar experience. When i measure my thrust line against the wing and evlevator i found my thrust line to be postive about 1.5 degree. It was easy to see veiwing the plane from the a side veiw. I had to add washers for 2.5 degrees neg to achieve zero elevator trim. This just may be a case of manufacturing differences on whom ever installed the firewall. Like G-Pete said you can fly it first to determine if it will be needed. Hope this helps.

PS. Just saw the new Saito g-36 Gas 4 stroke engine at the hobby shop today. What a beuat. This is the Saito 220 36cc. with tons of torgue power.
Old 12-05-2007, 11:13 AM
  #2544  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Just remember you are looking at a 4-stroke gas, and cc for cc it is less powerful than its 2-stroke equivilent. This Saito engine, as advertised, produces less power/thrust than a Zenoah G26ei that is close to half the price, and the AUW is almost identical. Is the 300 dollar difference worth it for the 4 stroke sound, and decreased performance?

Chad
Old 12-07-2007, 10:46 AM
  #2545  
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Default RE: New 81" P-47 ARF coming from Hangar 9

nah...
Old 12-10-2007, 07:51 PM
  #2546  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Buy a Zen G-38, put a Mejzlik 18x8 on its nose and you'll be a happy camper. A very happy one. Trust me. All that will cost you not more than $350.00 total.
Old 12-16-2007, 10:21 PM
  #2547  
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Default RE: New 81" P-47 ARF coming from Hangar 9

ANy reports from people using a DA-50 on this bird? I flew mine with a ZDZ-40, but I want to go with the DA since I have one lying around.
Old 12-21-2007, 09:31 AM
  #2548  
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Default RE: New 81" P-47 ARF coming from Hangar 9

ORIGINAL: dubd
ANy reports from people using a DA-50 on this bird? I flew mine with a ZDZ-40, but I want to go with the DA since I have one lying around.
I had the choice between the DA 50 and the Kroma 50. I know the DA 50 and it is a powerful and reliable engine and the customer support is superior. But there are two things held me up from going with the DA. First cutting a huge hole in the weak firewall already, second how to reach the carb needles.

Well, you have one already so use it. You can make an access door for the needles and beef up the firewall. The DA 50 takes a 22x10 easy and you will be very happy with this setup. The plane will feel totally different - like a full scale one...lot's of power to spare.
Old 12-25-2007, 08:17 PM
  #2549  
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Default RE: New 81" P-47 ARF coming from Hangar 9

Who makes the best struts for this plane?
Old 12-25-2007, 08:41 PM
  #2550  
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Default RE: New 81" P-47 ARF coming from Hangar 9

I've had Two. Stock struts, with recommended servos, have been good to me. Flying off just average grass fields.


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