GP YAK engine

[mark nichols]

Hi Guys i ve just boght a GP Yak as a everyday fly plane i have the QQ86 (but it only fits in one of our cars and i only use it at the weekeds) and have bought the gp yak for 200.00 new off someone who doesnt want to build it. My everyday plane has been an ef extra 58 and then flying the QQ weekends, but i wanted something bigger and this seemed a steal.

Firstly is this plane any good, i was going to get the 73 QQ or aeroworks then this came up, i dont want to build a plane thats not going to fly well, id rather resell, honest opinions.

Secondly im trying to build cost effectively so i can just throw the plane about and not worry about cost when flying. I would appreciate advice on an engine and what you have in yours or a friend has. The site states os160 glow or 43cc gas. I have considered glow but would like gas as its way cleaner etc but that os 160 is cheap and os engines are very good.

Honest opinions please, i have thought of zdz 40,dl50, i would love another da in it as the one in my QQ is superb but it is a cost issue here.


Thankyou in advance for taking the time to reply.

Mark

[RCEXTREMEPOWER]

We have had very good reports with this engine.

Area 51cc are HERE!!!!!!!!!

Milton

[mbartsch]

i had the same plane with a DL-50, and is unlimited vertical with 3/4 throtle on a 22x10, and well.. is a yak, flight like any other yak

[pani]

Hi Mark,

I'll be honest mate.
Sell it.
It's designed for a glow engine.
I did the same mistake.
I had a DA 50 on mine with a standard muffler. Tons of power but when of throttle all hell broke loose. The wing loading is just not there. I would not agree with mbartsch (no offence mate) that it flies like any other yak. It flies NOTHING like my QQ Yak 86 or even the dirt cheap League RC Yak 54 that I have as a throw about. It also came always heavy and fast for landing, needing twice reinforcement at the landing gear plates. Flew pretty well KE. When on high rates it would abruptly snap.
If you decide it's a keeper just make sure to mount the rudder servo inbound as it's coming out a tad tail heavy with it mounted aft. Reinforce the LG beforehand as well.
All the gear is out of mine now waiting to be put in the EF 88.5 Extra I'm waiting. I guess it would be perfect with a 160 glow but I just can't go back to such a large glow.

These are my thoughts on your dilemma.

Sorry for my english, not my native language.

[mark nichols]

Hi Pani,

Yes after much more research ive decided its going to go, The QQ flies so well and i just wanted a smaller practice plane, im going to sell and either go for the ef yak or aeroworks ar the ef new 78 extra and have a better practice plane than the ef 58 extra i have now which is good but not good in the wind. Ive had bad flying planes before dont want to go there again.


Mark

[flynz4me]

I've had similar experience with this plane, DL-fiddy, stock muff, etc.... It was my Basic IMAC plane and it lasted 2 comps... The gear plate was repaired when I bought mine and it flew in for landings not float like my Carden Yak (H9) did. The squares are low for the 81" wingspan and unless you can get this plane to 12 lbs an OS 160 ain't slicing that bread, maybe precision, but it wouldn't 3D that thing. That 43 wouldn't be worth putting in there either... Sorry to be so harsh, but I was GIVEN one two weeks ago and it sits and it will sit until the day I give it away...

BUT...... It would be a great fist Giant for a n00b...

My opinion, take it for what it is worth.

Devin

[mark nichols]

It seems that you either love or hate this plane i see from an early john glenzalis posting he raved about the plane? And then i see Jason noll said no good at all for 3d? Hell no wonder you dont see many flying or on you tube. I saw nick maxwell flying his on xfc 2007 with zdz 50 and it flew really well i guess that boy can fly!

Anyway im not going to put hard graft into this plane it looks fantastic but ive put on ebay,ef or somenzini here i come 73 size.

Mark

[mark nichols]

Well for a comlete turnaround ive bought a zdz40 and am going to build the plane, im so interested to see how it flies after the mixed reviews. It will be light when i finish with it and seeing the new aeroworks 78 which also come in heavy i cant see what all the fuss is about. I have ordered a QQ python also, but that is a special plane.....Sit nicely with my QQ86..but the gp yak will be that windy weather..chuck it in the car plane at least till winters over....

Mark

[pani]

Keep us posted mate!

[mark nichols]

Hey Pani,

I will keep you posted, its turned into one of those planes that I know i will go why did i bother but then again theres a wicked part of me saying ill prove them wrong, Ive spoken to Nick Maxwell about the plane he flew one at XFC2007 on a zdz50 and said it was way overpowered but flew really well and a couple of imac guys who have them all via email?

Anyway i decided a lighter engine probably change to a tuned pipe also and some carefull weight saving may make the plane fun. Being used to tail heavy planes ill be starting with the c of g further back thus being able to save weight. And also if i can get it right i can then pass on to a entry pilot who wants to move up a class knowing its a well set up plane and i have a guy in mind already who likes the plane.

So fun for me and hopefully a good learning plane to pass on.

Mark

[mark nichols]

Well, used my trusty DA standoffs on the zdz40, figured why add weight when you can shove the engine far forward and then get a whole load of nice prop wash over surfaces. So iam about 30mm further forward than the manual and a huge chunk of firewall gone also. Also ran carbon rods to all surfaces and tried to keep lite. Have a duralite 4300 pack and a nimh 1500 for ignition on firewall will replace with lipo in fuse when i fly a few times to move c of g further back.

Ran engine today 1350 idle-7900 full throttle transitions real nice on a 21x8 mejzlik. Superb motor, i discovered that zdz like plenty of fuel to start a real non issue.

Weather is poor here so as soon as we get a clear spell im off to see how she flies.

Its going to be fun

[mark nichols]

OK its not good weather had about 15 flights so far Im happy my c of g is way back and she flies OK not as good as my QQ but OK. For a throw about bird she is fine power with zdz40 is insane so with a 50 it must be well i cant imagine.

I cant say much more as i cant get any decent weather to really find out how she flies, flies very lite and is solid on elevators and harriers so far, but the weather is against me here.
Will post back if we get better weather to really see how she flies.

So far Im happy and am seeing no bad tendencies but mine is very lite for a gas setup. And the QQ is safe in the garage soon to be joined by a Python....Spring come on

Mark