RCU Forums - Lanier Yak

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- - Lanier Yak (https://www.rcuniverse.com/forum/3d-flying-82/3488870-lanier-yak.html)

rchotdogpilot could you also post a few pics if you get the chance, and your feedback on build quality?

What engine are you planning on using?

Cheers

Lang

I too am expecting one anyday and will be weighing the components, pictures etc. That'll give a couple sources of comparison. I'll be using a fairly new digital postage scale (Escali) that's been proving out to be within .1 oz of the post office scale... good enough for me.

My loadout:

DA50R with stock muffler
Chip Hyde Products 23x8 Prop
6X Futaba S9451's on the ailerons/elevators
Futaba S9602 on the throttle
1X HiTec HS 5955 on the rudder
4800 mah lion
SmartFly regulator with failsafe switch
SmartFly Optical Ignition Cutoff
2X Smartfly Equalizer II's to match aileron servos
1400 mah nimh on the ignition
16 oz DuBro tank
4" Bisson Fiberglass Spinner

Potentially: CF wingtube, stab tubes & tailwheel... Might be a while before CF gear is available for this design. (2 piece/insert into slot)

Will probably replace the tires with some really lightweight but dense, firm foam wheels. (If I can get anymore)

Sounds like we'll be some of the first on the block Maudib. Hopefully we get similar numbers on the weights, I would hate to see some large variations.

My Set-up

ZDZ 50 (Not sure of muffler, I may modify for a cannister)
Menz 23X8
4X Airtronics 94758Z (I'm only doing 2 in the Ail's not 4 and the 2 for the Elev)
1 Hitec 5955 for the rudder
2 Hitec HS-81 MG for throttle and choke
1500 Mah Li-Po for receiver (I have several of these to change out after every flight)
Smart Fly voltage regulator (no switch, since I will replace battery pack for every flight)
910 Mah Li-Po for ignition
12-16 OZ Fuel tank
No spinner and No wheel pants
I will also do all the nessisary CF for this plane.

Some of my decisions for my set-up have been heckled by a few of my friends and others on RCU, but I am looking for absolute lightness. I have flown TOC Yaks that were pushing 18 LBS and they flew great (also one servo per ail), but I want to have the lightest flying Yak at our place.
Also, once the pocket book recovers from this plane, I will be upgrading to the 14MZ. This is to take advatage of the high speed servos I got for this thing. in nearly 25 years in flying, I have never seen a radio make so much difference in the feel and flight quality of an airplane. My buddy got one and swapped out his 9C in a GP Patty and it was a totally new plane. Amazing.

That certainly should make for a light setup... and you have every right to select/equip as you see fit. Everyone has a level of confidence to meet and that's what matters.

I think it was cautioned about servo placement though... the root or tip location designed by Lanier will most likely not be sufficent to center the aileron force on the servo. If uing one or the other, flutter can (and often has) occur due to surface flexing in flight.

I'm sure the reason they went with two is the 80cc people... but it would have been nice to have a 3rd in the center for an option... oh well..

Agreed. BTW Maudib, you're located near Columbus, correct? If so, I have many friends down there that I visit and just recently, one of the guys I used to fly with moved down there. He will be flying at some field just south of 270, if I'm not mistaken. Which means I will be down there to visit with him, most probably with the Yak. So if that is your field, see you this summer.

Not my field, but you may still see me... is it TORKS in Grove City or Lancaster?

I'm thinking Grove City. He lives near the hospital off of 270 and Broad, maybe. Somewhere in that area

rchotdogpilot those servos are certainly fast at 6V. Have you used that brand before?

It seems that 50's are a popular size for this Yak but I may go for a bigger engine. Weights and cg will be critical to this decision.

I should have my Yak by the middle of next week according to UPS information!

Lang

Okay, I have some engine weights for those interested. Although these engines have not been mentioned much for use on this Yak, I thought it could be helpful. I originally bought a Evolution 45MG for this plane and weighed it on my calibrated scale at work. It didn't come close to the advertised weight, so I sent it back and got a ZDZ 50 instead. So below are the weights

ZDZ 50 (Engine and engine hardware) 49.5 oz
Supersonic Muffler for ZDZ 50 9.7 oz
Ignition for ZDZ 50 4.73 oz
ZDZ 50 with ignition 54.23 oz
ZDZ 50 with muffler and ignition 63.9 oz

Evolution 45 (Engine and igniton) 54.4 oz
Evolution 45 (Engine only) 48.7 oz

ZDZ 60 (Engine only) 66 oz

Figure the igniton module for the ZDZ 50 and 60 are the same and the muffler is a little larger, by 2 oz and the ZDZ 60 comes in at 82.43 oz. That is 18.53 oz heavier than the ZDZ 50. Also what amazed me, was that the advertised weight of the Evolution 45MG was something like 4 oz heavier than advertised and the ZDZ 50 is pretty much right on.
Anyway, once I get the plane, I will take pics and weigh it, but that probably won't happen until Thursday.

Quote:

Here are the weight figures for the Evolution 58GX.

Evolution 58 (Engine with plug, no standoffs) 64.5 oz
Bisson Custom Muffler for 50GX 9.5 oz
Ignition for Evolution 58GX 5.8 oz
Evolution 58GX with muffler and ignition 79.8 oz

For the sake of discourse (no argument intended), if the ZDZ 60 comes in at 82.43 oz, the 58GX is 2.63oz lighter (maybe the same factoring the standoffs) but .8 HP more powerful. The 58GX at 6.8hp @ 6700rpm (dyno verified), or 6.876 HP/ 47.62 Lb thrust with a Mejlik 26x10 turning 5950 RPM (Thrusthp data). So far in the 60cc class engines the 58GX shows a slight advantage, at least on paper. Don't get me wrong, the ZDZ 60 looks like a perfectly viable engine for the Yak. And the price is only $10 bucks more than a 58GX. As my grandpa used to say, "Figures can't lie, but liars can figure". I know....I know, they are both 1 lb heavier than the well trusted DA 50R, but I have not seen a DA 50 turning a 26x10 prop yet.

Some folks will argue this engine, as well as the ZDZ 60 is more suited for 35% planes because wingloading concerns. In my personal opinion a larger thrust to weigh ratio has not killed many pilots (there are limits to everything i.e. the infamous GeeBee). I remember when a full blown RC Aerobatic (F3A) model weighted 8 to 9 Lb, and was powered by a .60 ci Webra Blackhead or some other exotic engine in that class. Nowadays a decent 2 meter Pattern ship will not tip the scales at 6 Lb (they got rid of the useless retracts), and is moved along by a four stroke 1.60. So.....different strokes for different folks... I’ll say, when it comes to engine power, lots is good, more is better, and too much is just enough. I'll bet you guys, someone out there with a lot of bling in his pockets is planing on how to mount a ZDZ Super 80 on this bird.

How did you guess!!!

If you will break the bank why don't you consider bme110 extreme? if it is power it beats 60-80cc, if it is weight it beats again at 64oz bare. :)

alpsat, well that's a nice engine! Very nice performance figures and low weight, and yes its a bank breaker...

I did contimplait putting the ZDZ 80 in this bird, but that was before I saw the guys flying the TOC with the 80 and coming in at near 19 lbs, so I figured I would go the opposite route and get it less than 16, which means, no 80 for me.

Talk about either being popular, or not having enough brought in, but Tower is showing that this thing is out of stock already. The showed in stock on Monday and now out of stock on Wed. Glad I got my order in, back in October. :D

You'd have to switch from the 28x10 it likes to spin to a 25x10 3 blade for ground clearance... and then you'd be trimming the lawn... ;)

Hover at one click and remove the wings at two.

Oh... and the cowl is way too narrow... otherwise I mighta done it... ;)

Quote:

ORIGINAL: alpsat

If you will break the bank why don't you consider bme110 extreme? if it is power it beats 60-80cc, if it is weight it beats again at 64oz bare. :)

Quote:

Oh... and the cowl is way too narrow... otherwise I mighta done it...

In the pictures on the Lanier site DA50 plug cap sticks out the cowl very slightly.. In BME the distance from the center to the plug cap is about 0.5" shorter and DA. I think you can hide the engine in the cowl if you really want to...;)

Not a chance... :) It's barely fits inside the QuiQue 102" cowling with boots on.

Hey let me know how it goes with the 3w-70. If it goes well Im going to throw in my 3w-75. If not I will use the 3w-55

Quote:

rchotdogpilot,

Just received Tower confirmation that UPS picked up my shipment yesterday. It should be home anytime now. Usually takes two to three days from Champaign to Peru, Indiana for UPS Ground deliveries.

You are right, Tower shows Out of Stock already. Seems they only received enough kits to cover the back orders. Problably Lanier wants to supply their other dealers. It looks like this is going to be a very popular plane this year, a lot of folks feel is a great deal for the money.

I am expecting your feedback on component weights, and in were to shave some pounds off. Please let us know as soon as you receive your kit,

I tracked mine and it'll be here tomorrow... :)

Just measure the inside diameter of your cowl when you get it. BME110 cap to cap distance is about 10.5". I believe this thing is bigger than we think... Really excited about it. If the weight figures comes out good, it will be the airframe for my DA50.

With caps it's right at 10 3/8" I don't think she'll make it... :) My QQ 102" cowl is 12" so it's just a good fit with about .75" on each side...

I was just kidding about the 110.... that really would be the most ludicrous setup I've ever seen. Truly a fella could develop flutter going straight up! :)

Nope... the DA50 is going in this baby.

I am going to pick mine up here in a few minutes. I will post the pics tomorrow if my friend can find his camera. I will weigh it tonight and will have weights for individual components, except hardware, that will be in one weight. Wing panels, fuse, tail feathers, wing tube, landing gear and anything else I can find in the box I will report on. Also I will write quickly about what I find for quality, until I cann post the pics on Thusday morning, hopefully. I will tell you right now, if it comes in heavier than 10 lbs out of the box, I will make a decsion to send it back or sell it to someone on the post if they want it. If that happens, I'll be ready to cry, cuz I have waited so long for this thing. Passed up on the TOC's and other, to wait for this one.

One thing you all forget, even if this thing comes in at 18lbs. it is still better than the other yaks because it is a larger plane and can handle the weight better. I really think this plane will ge easier to balance with a 60cc engine, you guys with 50cc are going to be hard pressed to balance this thing, It probably can be done but will take some work.