75cc yak QB question

75cc yak QB question
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75cc yak QB question - 7/1/2006 9:40:00 PM

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Will the 75cc yak perform 3D with the 3W75? Anyone have this plane with the 3W 75 on it yet? How would hovering be with this engine. Could you use one 5955 servo per wing panel?

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RE: 75cc yak QB question - 7/2/2006 1:37:00 AM

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When we tested ours with the ZDZ 80 it had a TON of power even at 6000' asl the 75cc would do just fine for unlimited 3D if you are at or near sealevel. As for one servo per wing I would stick with 2 since the size of the aileron is so large.

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RE: 75cc yak QB question - 7/19/2006 2:26:52 AM

Nate69

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I don't know for sure but i think it will be awesome with the 3w75. I am starting to put the 75cc yak together with the 3w 75 It may be a couple of weeks before i get it done and flying.

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RE: 75cc yak QB question - 7/19/2006 8:06:34 PM

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Mark
If i want to install a tuned pipe with the 3W-80XI, what's the header drop?
Daniel

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RE: 75cc yak QB question - 7/26/2006 10:55:55 PM

smarks

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I have one with a 3W75i finished. Will be able to tell you how it performs after this weekend, hopefully. I am at 6000 MSL, but the 3W75 should be fine.

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RE: 75cc yak QB question - 7/27/2006 12:52:59 AM

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man that's a good looking plane!!!!

I inda of want one

but I want to put a Da 100 in the nose,,,maybe I should wait for the 100cc yak!!!!!

How wide is the cowling?????

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RE: 75cc yak QB question - 7/27/2006 1:19:13 AM

smarks

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Thanks man! It took longer than the 8 hours they say it takes to put it together. The cowl is about 10 1/2" wide. That would be one mean beast with a DA100!!

< Message edited by smarks -- 7/27/2006 1:20:27 AM >

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RE: 75cc yak QB question - 7/27/2006 2:07:34 AM

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I know that's why I'm afraid it would be too much,,,but at the same time I see lot's of guys outhere with 33% ers and Da 100 in it!!!

Tha thing is if it only weight 22lb I could fly it with my DA-50!!!

I flew the QB 260 with the DA 100 and at 29+ lb it would hover at only 1/2 throttle and would shout it out almost like a rocket.

I'm the kind of guy that thinks that light flies better and I don't want to make a plane that it's sopoused to weight 22 or so lb. with a 75/80cc and installibng a 100c might go over 24 or so..

I can't wait to see more videos of either planes!!!!

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RE: 75cc yak QB question - 7/27/2006 2:16:24 AM

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If you were going to put a twin in this plane, the only sane option would be the BME 110 and stock mufflers. It would weigh less than a ZDZ 80 Super with a pitss-style muffler.
Smarks, did you get a chance to weigh it? What other equipment did you use?

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RE: 75cc yak QB question - 7/27/2006 2:20:03 AM

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I heard the BME 110 is not that bad ass,,,is it???? I heard they get hot!!! is it right????

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RE: 75cc yak QB question - 7/27/2006 2:49:14 AM

smarks

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Here is all the equipment:

JR9303
Rudder - Two JR8611a pull pull
E - Two JR8411
A - Four Hitec5945MG
Throttle and Choke - Hitec5475HB
Matchbox on elevators
Smoke - Slimline Showtime Pro
3W75i w/Pitts
Nova Extra spinner from Air wild
Mejzlik 24x10
Duralite batteries 2400 ignition 4000 on receiver fail safe switch/regualtor
CF wing tube

Came out to just under 24 with smoke. Probably a bit on the heavy side. What can ya do??

Question for you bodywerks - You fly down in the springs right...I think we met out at chatfield. I had a Wild Hare Extra 300lx. Remember?? Anyway, the engine offset for the Yak is recommended at 7 to 7 1/4. Mine is at 6 1/4. You think that will hurt? Someone told me that I need extra clearance because of the big cowl. I have run the engine and it seems to pull just fine. Thoughts?

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RE: 75cc yak QB question - 7/27/2006 4:42:20 AM

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7 to 7 1/4" is not EXTRA clearance. It is the clearance the manual calls for. Look at the pics of the real Yaks. The prop is spaced way out from the cowl. And the reason is to get more prop blast past that huge cowl. But if the looks bug you, go ahead and stick it right up close.

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RE: 75cc yak QB question - 7/27/2006 4:55:12 AM

smarks

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But you don't think it will cause any major issues being closer?

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RE: 75cc yak QB question - 7/28/2006 2:13:10 AM

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quote]ORIGINAL: smarks

But you don't think it will cause any major issues being closer?
[/quote]

As long as you can get the plane to balance you will be OK. It does help make the prop a little more efficient but the big reason is for 3D. On another note were did you get the carbon tube from? The plane looks great by the way let me know how the maiden goes.

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RE: 75cc yak QB question - 7/29/2006 7:26:13 AM

smarks

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Thanks for the info. It does balance fine. Just curious why it helps with 3D?

I had the carbon tube left over from a Wild Hare Extra 300LX. Got it from Troy Built. Same ID and OD. Although it was about 3" too long, but cut it to the same length as the stock tube and it fits perfectly.

I'll let you know how she flies!

< Message edited by smarks -- 7/29/2006 7:30:56 AM >

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RE: 75cc yak QB question - 7/31/2006 8:06:50 PM

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quote:

ORIGINAL: smarks

Here is all the equipment:

JR9303
Rudder - Two JR8611a pull pull
E - Two JR8411
A - Four Hitec5945MG
Throttle and Choke - Hitec5475HB
Matchbox on elevators
Smoke - Slimline Showtime Pro
3W75i w/Pitts
Nova Extra spinner from Air wild
Mejzlik 24x10
Duralite batteries 2400 ignition 4000 on receiver fail safe switch/regualtor
CF wing tube

Came out to just under 24 with smoke. Probably a bit on the heavy side. What can ya do??

Question for you bodywerks - You fly down in the springs right...I think we met out at chatfield. I had a Wild Hare Extra 300lx. Remember?? Anyway, the engine offset for the Yak is recommended at 7 to 7 1/4. Mine is at 6 1/4. You think that will hurt? Someone told me that I need extra clearance because of the big cowl. I have run the engine and it seems to pull just fine. Thoughts?

It was that nice-lookin, but 22 pound 50cc Extra with the 3W 75, right? I remember. If you like how that thing flew and the power it had, then you will love this Yak! 24 ain't bad with a smoke system, but probably not enough to pull out of a hover...
As for the prop clearance from the cowl, it is necessary to have a considrable amount in order to get the most thrust out of the prop and it also might help the engine run cooler. You can try it like you have it and if it doesn't get hot and has enough vertical for you then leave it.

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RE: 75cc yak QB question - 7/31/2006 8:12:52 PM

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quote:

ORIGINAL: charrua

I heard the BME 110 is not that bad ass,,,is it???? I heard they get hot!!! is it right????

I'll be honest. I am not impressed with the power of mine, but I may just be having issues. I have seen some that were powerhouses and BME claims that no DA should be able to keep up with it. I have unfortunately found just the opposite. And yes, the engine does run hotter than the DA, but