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Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

Old 06-30-2007, 10:10 PM
  #26  
Bosshossv8
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

I am hoping a 3W 106CS I have will balance this one out OK.

Alright.....104" .....given. Next up....42%????

OOOOh....how big is the cowl on the 104??.....18inches???
Old 07-01-2007, 07:25 PM
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cadconversions
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek


ORIGINAL: Bosshossv8

I am hoping a 3W 106CS I have will balance this one out OK.

Alright.....104" .....given. Next up....42%????

OOOOh....how big is the cowl on the 104??.....18inches???
It scales out a little over 14.1" comparing wingspan % to wingspan %
Old 07-02-2007, 10:10 AM
  #28  
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

Cad,
If this is like any other 100cc plane, then yes, there is only one servo per each elevator half. It obviously needs to be top-of-the-line, though, with over 200 ounces of torque. And you can easily run just one rudder servo, but I'd only recommend the 8711 for this big of a plane. I have a 5955 on my 35% 260 and it works fine, but it also only weighs 27 pounds wet and I don't compete with it or do knife edge loops all day long.
Old 07-02-2007, 11:22 AM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek


ORIGINAL: bodywerks

Cad,
If this is like any other 100cc plane, then yes, there is only one servo per each elevator half. It obviously needs to be top-of-the-line, though, with over 200 ounces of torque. And you can easily run just one rudder servo, but I'd only recommend the 8711 for this big of a plane. I have a 5955 on my 35% 260 and it works fine, but it also only weighs 27 pounds wet and I don't compete with it or do knife edge loops all day long.

I thought the 8711 and 5955's were the same size / ratings? I'll probably sale my 50cc end of the year and pick this one up for my winter project so I'll use everything but a few items on this bird.
Old 07-02-2007, 04:11 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

Looks just like the Ultra Rc 107" Yak....Hummm?
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Old 07-02-2007, 04:28 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

looks like a EF Yak to me
Old 07-02-2007, 04:30 PM
  #32  
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

It flys like an EF yak,looks like an EF yak,Hummm, must be an EF yak?
Old 07-02-2007, 04:41 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

What exactly are you implying? My guess is that the UltraRC Yak is derived from a previous 107" WS design that may or may not have originated from EF. The new 104" WS EF Yak is likely a new EF design...
Old 07-02-2007, 05:00 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

I'm not impling anything. The Ultra yak was/is Chris's design, if you do your research these were supposed to be the 35% EF yaks.
Old 07-02-2007, 09:16 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

I just want to know if my 3W 106 will balance this one out. If the DA100 install needs everything up front to balance it ..(Batts, regs) , and more...then the 106 would be ok by itself.

I know the 107" from Ultra is Chris' old 107 Prototype. I only want it from Chris'. And the 104 will be the shizzle.
Old 07-02-2007, 09:22 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

boss how about the balance for the BME-110-115 guys
Old 07-02-2007, 09:49 PM
  #37  
Richard D Bahmann aka/Wrongway
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

Gerald, how bout the balance on a 85 cc'd pipe setup for the cheap seats? Maybe we can ask the designer in the next few days when he returns.
Old 07-02-2007, 09:56 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

rdb127
i feel ya, you know i am on that list for the DA but the more and more i wait the more its not helping their case

the 115 gives me so much room to grow

That 106 from 3W is a good look on this plane on can or pipes, just makes my mouth watering thinking about it. I have had many brands of motor but never a DA......but i am trying [8D]
Old 07-02-2007, 11:00 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

ORIGINAL: plaster93
I'm not impling anything. The Ultra yak was/is Chris's design, if you do your research these were supposed to be the 35% EF yaks.
I guess I didn't understand your reasons for injecting vague remarks about an off topic airplane into this thread. Sorry. Now back to the regularly scheduled programming!
Old 07-03-2007, 05:48 AM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

4lb, 5lb, 6lb motors............which will balance the 104"???

In time....I doubt the 4lbers....probably will need extra weight up there for them.
Old 07-03-2007, 10:57 AM
  #41  
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

is it just me or does it look like a 2 seater Sukhoi
Old 07-04-2007, 06:27 AM
  #42  
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek


ORIGINAL: WarbirdAirRacer

is it just me or does it look like a 2 seater Sukhoi

LOL. I thought the same thing. But, I snapped out of it....it's a Yak, man.
Old 07-04-2007, 11:05 AM
  #43  
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

I tryed to snap out of that thought but I just couldnt do it for some reason.[sm=confused.gif][sm=confused_smile.gif]
Old 07-04-2007, 07:40 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek


ORIGINAL: cadconversions





I thought the 8711 and 5955's were the same size / ratings?
Actually, no. I have seen independent testing results comparing the 8611 and the 5955 where the 5955 only produced 220 ounces of lifting torque. This is the same independent testing where the actual 320 oz.in. capability of the 8611 was revealed (of course, it also revealed that the servo smoked shortly after!). Given that JR under-rated that servo, I would bet that the 400oz. claim of the 8711 is pretty accurate, and means it has over 180 oz.in. more torque than the 5955 actually has.

Here is a link to the site:
http://servotestsite.com/page5.html
Old 07-04-2007, 07:43 PM
  #45  
Jake Ruddy
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

not according to this http://www.troybuiltmodels.com/servo_testing.htm
Old 07-04-2007, 08:14 PM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

yeah troy told it like it was
Old 07-05-2007, 06:59 AM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

THat info on TBM is eye-opening ,for sure. But, as with any independent study, controls and such can be picked apart by experts. So, while using it as good honest info, don;t thinkit is the tell-all, end-all of those servos. That's all.


But, if one fact is clear....servo fade is for real.

TBM suggests by it's writing syntax ,that the 8611 gears are sloppy , but not the 8711...or am I reading this wrong??

I am not critical of the tests or writing, but once again, it is not the definitive.

No doubt the 104 will need authority and current capacity for the servos.

Can't wait, I look at my 88" and dream of it's Supersized Sister........
Old 07-05-2007, 08:14 AM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

Ya it's pretty hard to get a controlled test. Def some interesting info. The extension length drop is also interesting although there is no way around that really.

Personally I am happy with the 5955s.. I can KE-Loop my 33%er on one in the tail nps... I will be adding a second though... but really just for useable tail weight.
Old 07-05-2007, 09:15 AM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek

Yeah, it is also interesting how much torque they lose with heat. One thing's for certain, the 5955 has not produced 333 ounces of torque in any independant testing that I have seen. But, considering that I have been using a single 5955 successfully on my 35% 260, the 8711 can only be an improvement. I wonder if drilling holes in the aluminum case would help...
Old 07-05-2007, 09:52 AM
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Default RE: Extreme Flight RC 104 inch 100cc Yak-54 sneak peek


ORIGINAL: Bosshossv8


TBM suggests by it's writing syntax ,that the 8611 gears are sloppy , but not the 8711...or am I reading this wrong??

I don't think that they are sloppy, but they develop slop over time. The only reference to the 8711 gear train that I've seen from the "ask JR" forums from Danny was that it was the same as the 8611.

http://www.rcuniverse.com/forum/m_55...tm.htm#5586393

Sooo... if they broke at 300 then the extra 103 oz isn't going to do us much good.

The servo fade is real.. I will sometimes do several consecutive knife edge passes with my planes, most recently my 35% extra 260 with a single 8711 and I had the servo fade and it was noticeable, I added a second 8711 and the fade is gone now.

I run JR servos and deal with the slop, which isn't bad IMO, it took me 12 gallons of gas (not glow) on my 27% extra 260 before I had to send in ONE 8411, the others are still going strong with what appears to be the factory amount of slop. A lot of it depends on how you have them setup, Horizon replaced the gears under warranty, I sent a note along with the servo explaining that it was in their plane, using their supplied hardware, setup by the book, and they replaced them. Makes me wonder why that was the only servo, and the other 3 are fine, has to be some weird vibration on the left wing is all I can think of.

bodywerks... I've got some machinist friends that fly at my field, I bet the could cut some nice holes in the cases of the 8711, I wonder what it would do to the strength of the case. I talked to them yesterday about making some titanium gears for JR servos and they said they would be way to much work using their particular equipment. That would be awesome if we could get Ti replacement gears in JR servos, of course they would have to be reasonably priced, but I think JR likes selling us replacement gears.


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