RE: Extreme Flight 110" 100cc Yak 54 Build!  
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RE: Extreme Flight 110" 100cc Yak 54 Build! - 2/2/2008 8:02:09 AM   
kochj


 

Posts: 1504
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		I heard the mention of a 28x10;
A quote from a friend to is very knowlegeable in pipes told me this:
The 27x10 prop is often looked at as the "correct" prop for the engine .
It is OK for most use - but it is NOT the best prop for making power -especially on some in cowl mufflers
letting the engine rev up to close to 6900 -will make more power .
On tuned pipes and a 26x10 they really start to steam and make great power.
If you took an hour and test ran the engine in quick tests -- with NO mufflers (And had the carb adjusted right) your mufflers and latest factory mufflers --you would find three different readings
Best power here on is on 26x10 Mejzlic and factory cans --as opposed to other in cowl stuff
Best power --is on pipes of course .
The back pressure in it's self does NOT make more power -- it does greatly improve low end performance and if --the backpressure is timed to "pump" in sync with rpm -- you have a tuned system --
how about that --

A thoroughly tractable tuned pipe setup is both possible and available --the power bump is NOT drastic -
here is the classic error:
The pipes INCREASE torque -but typically at a higher rpm
Comes the error -- adding a bigger prop.
To get seamless power - add the pipes but use a prop which works well at high rpm
This allows the engine to transition from off pipe to on pipe with minimum struggle ( the struggle is caused by pipe changing temperature and tuning from low to high rpm .
a constant temperature pipe helps greatly in resolving the problem - aluminun is a problem as it changes temp easily
Carbon fibre pipes hold temperature better as will stainless steel pipes .
The DA100 piped with CF pipes done right---and on a 26x10 spins in the low 7000 rpm band easily and is very quiet and best of all NO herky jerky throttle problems .
One of the local guys has that exact setup on his CF YAK 55.
the pipes are new designs by Ed Skorepa (ES Composites) I will be running them on some of my planes.....
The are not cheap but they do work.
It is all a trade off -in this case cost goes up with performance and the size of th exhaust system is also larger.
If you have not seen how this temp thing works -it is hard to appreciate.

Hope this helps your desicion about prop and can/tuned pipe selection

Best of luck
Justin K.

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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/3/2008 5:29:41 PM   
kochj


 

Posts: 1504
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		FH,
You had mentioned the use of 7.4V lipos w/o any reg.
I have the Hitech 5955TG's but a standard servo for the throttle.....
and 5745 in the tail on a nother plane.....
Futaba pcm reciever.....
No issues using 7.4volts? Or do you need the spektrum high voltage system?

Thanks
Justin

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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/3/2008 5:44:00 PM   
kochj


 

Posts: 1504
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		On a side note:

Isn't funny how a plane like the great planes new 110" Extra, can make the front page of MAN.
But a plane like this one, no matter how great, doean't even get mentioned!!

I wonder who pays there salery?

JK

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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/3/2008 5:52:30 PM   
xtraflyr


 

Posts: 1618
Joined: 3/10/2002
From: Chester, NJ, USA
Status: online 		Yup figures,This is the one everyone is talking about and is goin to be a better quality product then that Extra. I still cant believe in this day and age they cant even make room for cans or pipes. Even if you dont need to be quiet where you live,at least have the provision for us that do want or need it cuz of the are we fly... They need a 150 to power their 110"!! AHHAHAHAH!!! Not to mention this plane is prettier then that Extra. And our covering will be unwrinkled in the sun while their monocote will look like grandmas stockings at her ankles!

Cya,
Frank

< Message edited by xtraflyr -- 2/3/2008 5:54:12 PM >


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       Post #: 254

RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/3/2008 9:43:53 PM   
Flyin Hawaiian


 

Posts: 815
Joined: 4/28/2005
From: Orlando, FL, USA
Status: offline 		Dudes!

Chris Hinson is basically a one man show. He oversees design, testing, redesign, retesting.......you know what I mean. GP has a team of TOP pilots, marketers, retailers, advertisers.......yes, they pay big bucks to Magazines, who review their products? ... I'm not saying the reviews are biased or unbiased, but you can't bite the hand that feeds ya. Yes, the GP Extra maybe a great flying airplane with a DA 150, and the reviews will say so.

Chris' planes are flown by folks like you and me. Guys, who knows guys, that are flying them and telling them by word of mouth (and the internet) how great Extreme Flight RC Airplanes. I think that is why Chris' planes (and others that he endorses) are tops in their class. Chris is involved every step of the manufacturing to distribution process, if he doesn't like what comes out off his production line, he will reject it till he likes it. (He's done it before). All that he is involved with yet, still has one of the best customer service in the BiZ! I am a huge fan of Chris and Extreme Flight RC, even before I got sponsored by him. Now if there was a way to get big Corp bucks involved to boost production, plug all the trade shows,............naaaawww. I am just guessing, but I think Chris likes it this way!


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       Post #: 255

RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/3/2008 10:32:36 PM   
kochj


 

Posts: 1504
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline
quote:

ORIGINAL: xtraflyr
I still cant believe in this day and age they cant even make room for cans or pipes. Even if you dont need to be quiet where you live,at least have the provision for us that do want or need it cuz of the are we fly... They need a 150 to power their 110"!! AHHAHAHAH!!!. And our covering will be unwrinkled in the sun while their monocote will look like grandmas stockings at her ankles!

Cya,
Frank


Those were my EXACT thoughts!
I also believe what FH is saying about EF and there planes!

I have not been in the industry for very long, I had read and herd (by word of mouth & the web, and Personal experience)
that Monokote used to be fantastic!! The best of the Best!..... Then, when they were on there way to be being bought out and since then the MOnokote pruduct suffered!
The worste of it all, is that GP/Topflite denies any change in formula or product!! Too bad, Really.......
I have many of there planes, so I am not bashing all there products. It is an example or what happens when a small company, with a great product, get brought into a Large company, with hundreds of employees ( that all want to screw with the product there OWN way so that they have JOB security or the miscomunication that occurs between the designers and the bean counters and the Upper CEO's.....
I can only take a quick quess, but if extreme flight were to go to go into a big corp. (like great planes) there product line would most likley see the same fate.

I can only say that they have missed the boat on that design!,,,,, not to say that it isn't a fine aircraft... IT is just behind the times!!!
Beside this plane and around 1000$ you are hard pressed for a 150cc plane under 1000$.......
Even if you look at the TOC extreme SD-models, The shipping is a killer...... Great planes has that going for them.....
If I had a 150cc laying around and I wanted a quick build plane for inexpensive price it is attractive to many.....
If you want a 150cc plane with all the fixings, you are going to pay 2300$ + ....

All I have to say is that Chris is a fantastic guy, and this EF yak 110" 100cc is a legend in it's own time,,,,(and it hasn't even been released yet)


Justin



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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/3/2008 10:34:32 PM   
kochj


 

Posts: 1504
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		What about that 7.4 volt thing?
FLying H.??

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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/4/2008 1:11:01 AM   
Flyin Hawaiian


 

Posts: 815
Joined: 4/28/2005
From: Orlando, FL, USA
Status: offline 		Justin

This 7.4 volt system, is just a no brainer. But so far the only servos that rated for this is the Hitec HSR5990TG, which is a robotic Servo and has 180 deg radius. Along with two the Spectrum or JR 9 channel 2.4G receivers which is rated to 9 volts, w/ either Li-pos or li-ion batts. That should be a reliable and simple power system. No regulators, just two quality switches rated at 7.4 volts. 3W Ignition is already rated at 7.4v, DA's ignition would be like what I have now. 2500 mah Nimh 4-cell 4.8v, no swtich and no regulator, just Smart-Fly Optical kill switch. To me this would be very reliable power system for 35% and 40%. Right now Servos is limiting the potential of this design.


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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/4/2008 4:41:51 AM   
yarom



Posts: 1121
Joined: 6/23/2005
From: Bellevue, WA, USA
Status: offline
Everybody has been using the Hitec 5955, which is not robotic, with 7.4 V without much problems.

For ignition, it's too much. Use a regulator or use a A123 pack at 6.6V. DA Ignitions are now rated to accept A123 packs.



quote:

ORIGINAL: kochj

What about that 7.4 volt thing?
FLying H.??


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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/4/2008 2:01:00 PM   
Absolut Yak



Posts: 490
Joined: 2/16/2003
From: NORTH AUGUSTA, SC, USA
Status: offline 		Rush7, One of my flying buddies bought your Panzl. Got to see it fly this weekend. Had a few moments excitement when on of the rudder servos failed with the rudder deflected. Got to bring the plane around and land like a Cub crabbing in the wind. Ditched the bad servo and flew nicely on one. He likes the plane.

I don't have a plane to rob the gear from for my 110" Yak. Too bad. Since I'm building a house, I'll probably sell the 88" to finance the 110".

Doug

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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/4/2008 2:03:43 PM   
drewbags



Posts: 201
Joined: 1/27/2005
From: NorwichNorfolk, UNITED KINGDOM
Status: offline 		Rennie

Do you have a measurement of how wide the undercarriage is - between the wheels and also the height of the rudder from top to bottom?

Many thanks
Chris.

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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/4/2008 6:19:22 PM   
kochj


 

Posts: 1504
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		THank you for the reply.....
No issues with a standard futaba reciever or others?

I just would hate to fry my recievers (kind of bad news if it were flying)
I have heard about running higher voltate, I am just leary!.....

Justin....




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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/4/2008 7:37:14 PM   
Rush7



Posts: 700
Joined: 11/8/2004
From: Chattanooga, TN, USA
Status: offline 		Two questions..........
Is it feasible to put a DA 150 in it? Looks to be about 2lbs difference.
Can you put a push pull rudder set up in the back?
Just doing a bit of thinking......

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RE: Extreme Flight 110" 100cc Yak 54 Bu... - 2/4/2008 8:06:12 PM   
Jake Ruddy