Lanier 87" Yak

[Boulder]

Well guys,

Somehow a NIB Lanier 87" Yak has found it's way to my shop. I will be selling my 30% Extra to make room, but that's another story...

So far, I'm very impressed with the looks of the plane. Now I have to figure out what I'll put in it for power. I'll probably use Hitec 5925's for the servos, except the rudder will get a 5955.

I will try to get pics and post them, along with a build thread, maybe.

Lanier calls for a 50cc to 80cc, and I just happen to have a ZDZ-80 sitting here.
The AUW is called out as 16.5 to 17.5 lbs., pretty light for an 80cc motor.

More to come...

[JeeUm]

Yes,pics please. I really like the looks of their new 50cc planes.

[analog_boy]

yes the yak looks most exellent lets see some pics.

[Boulder]

Yes,pics please. I really like the looks of their new 50cc planes.

Pics will come tomorrow, I need to move some stuff around in the shop to make room.

[analog_boy]

sounds good look forward.

[SleepyC]

An 80cc???

WOW.... thats like a Rolls Royce jet engine in a piper cub.

Whats the weight of the 80cc?

I bet it would bly MUCH better with a 3W 75 us in it..... :)
I would suggest trading me and being happy!! :)

Ok sounds good. I'll get that motor boxed up.

S

[Doug Novelly]

Ken, everything you have has one way or another, magicaly showed up on your door step. LOL

SWEET

DOug

[Neogenesis]

New ZDZ 80 Super is 4.5 lbs
New 3W 80i is 5.05 lbs.

And dang....if you can hit that AUW....that's gonna be a killer combo.



Neo

[SleepyC]

Ken, everything you have has one way or another, magicaly showed up on your door step. LOL

KEN!! can i talk to you about haveing a few things magically show up at my house?
Is this like some MOJO i could borrow.
:)

[Dennis C]

Dont you mean the plane found it's way to the back of your van..cause if it found it's way to your door.. your wife would put your Nut's in the blender

Now you give me your 30%'r and i wont call her :rolleyes:

[NimbleGimbal]

I highly doubt you'll hit the high end of the AUW listing even with a da50R... people on RCU are getting yaks that weigh 12.1-12.5lbs empty airframe, add a 6lb power system and you've got a fairly hefty plane for a da50, i'd imagine the 80cc would be even worse on the wingloading, but definitely have the power :)

[Kiwi]

Pics will come tomorrow, I need to move some stuff around in the shop to make room.

Ken.

We should send Max or his Mum over. After the job he done on his shop he has to get the first prize for MASTER SHOP CLEANER.

Give him a yell if you need help.

Funny how thing magically turn up at your door, Without previous notice, no doorbells ringing. No fancy wrapping paper either. Truly is a weird experiance when it happens.

No cut the foolin and get some photos in here mate. Weights, wingloading, the lot.

Kiwi

[red_z06]

Guys:

I just weighed GP 27% Cap 232 3D. The airframe is coming in at 7lb even. It will be a 13lb balistic missile with DA 50 in it.

[Boulder]

I highly doubt you'll hit the high end of the AUW listing even with a da50R... people on RCU are getting yaks that weigh 12.1-12.5lbs empty airframe, add a 6lb power system and you've got a fairly hefty plane for a da50, i'd imagine the 80cc would be even worse on the wingloading, but definitely have the power :)

Yep, 12.625 for the airframe alone. I am getting ready to post pics and weights, just have to finish compiling the data;)

[Boulder]

Ken, everything you have has one way or another, magicaly showed up on your door step. LOL

SWEET

DOug

Dang Dougie, you're tellin' all my secrets!!!

[Boulder]

An 80cc???

WOW.... thats like a Rolls Royce jet engine in a piper cub.

Whats the weight of the 80cc?

I bet it would bly MUCH better with a 3W 75 us in it..... :)
I would suggest trading me and being happy!! :)

Ok sounds good. I'll get that motor boxed up.

S

I don't think that trade would be in my best interest:D, especially since this plane will actually be around 20 lbs, AUW, dry.

[Boulder]

KEN!! can i talk to you about haveing a few things magically show up at my house?
Is this like some MOJO i could borrow.
:)

I could have a few things show up at your house, but I don't want to make you mad;)

[Boulder]

Dont you mean the plane found it's way to the back of your van..cause if it found it's way to your door.. your wife would put your Nut's in the blender

Now you give me your 30%'r and i wont call her :rolleyes:

We can work out a cheap deal on that 30%'r, with the Brison 4.2 and inverted pitts:D, the elevators and rudder has to be re-attached.:D :D :D

[Doug Novelly]

I could have a few things show up at your house, but I don't want to make you mad;)

Now thats funny!!!


Where are the pics Ken?

Doug

[Boulder]

OK guys,

Here are some weights,

Fuse with cowl and rudder 83 oz.
Left wing w/aileron 27.7 oz.
Right wing w/aileron 26.4 oz.
Right stab w/elevator 5.4 oz.
Left stab w/elevator 5.4 oz.
Stock hardware package 10 oz.
Wing and stab tubes 10.9 oz.
Landing gear 12.9 oz.
Fuel tank and wheel pants 7.3 oz.
Total for airframe only 189 oz. or 11.8 lbs.

Engine ZDZ-80 with ignition and pitts 82 oz.
Servos, 7-Hitec HS-5925's and 1 HS-5955 16 oz.
Standoff's and bolts 6 oz.
Prop and spinner 8 oz.
All battery packs with switches and
extensions. 16.3 oz.
Total for the above would be 128.3 oz. or 8.01 lbs

That makes the total estimated weight of this aircraft 19.81 lbs.

The airplane has a wing area of 1468 sq. in.

Pics to follow.

[Boulder]

I couldn't wait to get pics when I got home, so I took the plane into the house I was working on and took these pics today.

[Boulder]

some more

[Boulder]

Last batch

[YaKs are BeSt]

Thats real nice looking, Even though it kinda sux a little bit to have it at maybe 21lbs, I bet it wont fly like its that heavy, or maybe it will but it will still float.

[Boulder]

I'm going to try a few things to lighten up the projected weight, I'll try to get below 20 lbs.

Anybody know where I can get CF gear for this plane?

[Dennis C]

OK guys,

Here are some weights,

Fuse with cowl and rudder 83 oz.
Left wing w/aileron 29 oz.
Right wing w/aileron 28 oz.
Right stab w/elevator 7 oz.
Left stab w/elevator 7 oz.
Stock hardware package 13 oz.
Wing and stab tubes 13 oz.
Landing gear 14 oz.
Fuel tank and wheel pants 8 oz.
Total for airframe only 202 oz. or 12.625 lbs.

Engine ZDZ-80 with ignition and pitts 84 oz.
Servos, 7-Hitec HS-5925's and 1 HS-5955 16 oz.
Standoff's and bolts 10 oz.
Prop and spinner 12 oz.
All battery packs with switches and
extensions. 23 oz.
Total for the above would be 145 oz. or 9.0625 lbs

That makes the total estimated weight of this aircraft 21.6875 lbs.

The airplane has a wing area of 1468 sq. in.

Pics to follow.

Dude that is going to be a flying brick. i think you better buy another motor and not use the zdz 80

[red_z06]

21.5lb with almost same wing area of aerotech yak at 17.5lb :eek:

Well, at least it is $135 cheaper. Perhaps you can spend the money saved on cf spinner, LG, TG and stuff.

It is only 3lb lighter than my 102" Composite-ARf Yak 55SP at 24.5lb with BME110. Why is this thing so much heavier than their cousin Edge 540?

[SleepyC]

Thats a NICE looking plane.
I think the motor is adding what 2.25 lbs over say a DA.
So drop the motor, and get a lighter one thatgets you to 19.4
A Few carbon fiber pieces and it will come in around 18.5.

That will fly fine. (not to some of the weight freaks) but to the rest of us.. it will kick ass. My KMP yak is going to come in around 17.5lbs with a DA 50, and thats fine with me... i

Kenny that plane will rock.

I noticed that the whole fuse is sheeted... that will make that thing STRONG as HECK. that might add some weight, but it may be worth it to have a plane that can handle a few "not so perfect" landings. :)

[Boulder]

21.5lb with almost same wing area of aerotech yak at 17.5lb :eek:

Well, at least it is $135 cheaper. Perhaps you can spend the money saved on cf spinner, LG, TG and stuff.

It is only 3lb lighter than my 102" Composite-ARf Yak 55SP at 24.5lb with BME110. Why is this thing so much heavier than their cousin Edge 540?

Aerotech Yak is an 84", that's a start. I'm going to re-weigh the components with a different scale sometime today, I was using a digital fish scale.

[Boulder]

Dude that is going to be a flying brick. i think you better buy another motor and not use the zdz 80

Yeah, but it'll be a pretty brick:D

I need to find a motor that is a lot lighter with a ton of power. I'm looking at the new BME 55.

[Boulder]

Thats a NICE looking plane.
I think the motor is adding what 2.25 lbs over say a DA.
So drop the motor, and get a lighter one thatgets you to 19.4
A Few carbon fiber pieces and it will come in around 18.5.

That will fly fine. (not to some of the weight freaks) but to the rest of us.. it will kick ass. My KMP yak is going to come in around 17.5lbs with a DA 50, and thats fine with me... i

Kenny that plane will rock.

I noticed that the whole fuse is sheeted... that will make that thing STRONG as HECK. that might add some weight, but it may be worth it to have a plane that can handle a few "not so perfect" landings. :)

Yeah Sleepy,

It looks like it'll handle a few of my landings:D

The landing gear plate is up off the floor and tied directly to the sides of the motor box. That should make it stronger than some other planes, however, IF I ever tear the gear out, it'll make one he!! of a mess:D

[Kiwi]

Oh my god Ken, You spent too much time in the chat room with Kris.

BME 55 sounds like a good option all the same.

Hey Kris, you on a commission for these things or not?

Kiwi

[Boulder]

Oh my god Ken, You spent too much time in the chat room with Kris.

BME 55 sounds like a good option all the same.

Hey Kris, you on a commission for these things or not?

Kiwi

LOL!!

No kidding...I think I can drop about 2 lbs. with some different choices, I just need to do some research. You have to admit the 55 sounds interesting.

If I can save 2 lbs., that still puts me in the area of 19.625, a little heavy for a DA-50 for extreme 3D. One of the ways I will save weight will be carbon fibre parts and lighter batteries. I refuse to lighten my servo's to save weight, for obvious reasons.

[analog_boy]

man im sad to hear this thing is a bit of a flying brick :( thats really to bad.although my zdz 60 would still fly it quite nice a super 80 would just do great things.

[Boulder]

man im sad to hear this thing is a bit of a flying brick :( thats really to bad.although my zdz 60 would still fly it quite nice a super 80 would just do great things.

Don't be discouraged yet, I'm picking up a digital scale today to double check the weights.

I just went outside and double checked my two digital fishscales. Just the engine now weighs 5 oz. less than I reported last night. I have a feeling after I get my new scale, I will be a very happy boy:D :D :D :D

[Big J]

Glad to hear you're reweighing it. I didn't see how it could possibly come out that heavy. I hate to see guys dogging a plane before anybody has even built one.

[bodywerks]

Yeah, but it'll be a pretty brick:D

I need to find a motor that is a lot lighter with a ton of power. I'm looking at the new BME 55.
I am 99% positive the BME55 won't work. You'd have to have a lead spinner and batteries hanging off your crankcase to even make it flyable, but it would still be tailheavy.
You know what else - do an actual measurement of the wing; I bet it is considerably less than 1468 squares...as if a 34 ounce wingloading isn't brick enough...well, maybe you shouldn't measure it-it might kill you! It is a nice looking plane, but it ends there for me...

[Flatlandman]

go for the bme 55 even if after you mount things forward you need to add a little weight up front it still will be lighter than the other engines setup if you have to add wieght to ballance you could go with a can style muffler and be fine or many other ways of compramise

by the way it isnt that much lighter than others i dont know why people are up in arms about it and when did a lyter engine become a bad thing this just goes to show people have to complain about somm'n

[red_z06]

Yeah, but it'll be a pretty brick:D

I need to find a motor that is a lot lighter with a ton of power. I'm looking at the new BME 55.

I've got a 27% Cap that needs a light gas motor. The airframe is 7lb and I just can't get myself to mount 3lb DA50. Does anyone know where I can get a bootleg BME55 at any cost? It will be a 12lb 50-55cc bird.

[Flatlandman]

theres a list for the first run of the bme 55 there not selling yet call BME engines and he will tell you more solid numbers of due date and how many are on the list for a first run motor

my friend called about his 110 and found out about the 55 being almost ready and got on around the list then number 25 that was a 4 weeks ago or so

[Flatlandman]

it would really suck if ya had to use a da50 and the thing weigh 12.5# lol

[Boulder]

Ok guys,

I've just revised the numbers in my "weights" post.

The total for the airframe and hardware is 11.8 lbs., that is without changing to any CF parts.

Changing the weights for my power system and control system the new number is 8.01 lbs., this is going to Li batteries.

That makes the new total, with the ZDZ-80 and a pitts muffler is 19.81 lbs.

With some CF parts I can drop another pound, with the BME-55 I think I can pick up another 1.5 lbs.

This sounds a lot better:D :D :D

[analog_boy]

that sounds like kicking ass

[Boulder]

that sounds like kicking ass

That's exactly what I thought, I'm still smilin'

[Dennis C]

You'll be alot happier if you get that plane down to 17 ish.

[Boulder]

You'll be alot happier if you get that plane down to 17 ish.

About 18 with a BME 55. I don't know where else to cut weight. I'll be looking for all the CF parts I can get.

[Dennis C]

My 28% wildhare 540 weighed 18 lbs w/ a da 50 and it had plenty of power and landed like a feather. whats with the bme 55, are you hung up on that motor.

[Boulder]

My 28% wildhare 540 weighed 18 lbs w/ a da 50 and it had plenty of power and landed like a feather. whats with the bme 55, are you hung up on that motor.

Nope, just hard to beat the power to weight ratio. 3 lbs with ignition, muffler and battery with the switch. I'm still waiting on the real data on the performance of the BME, prop size and RPM's. I think the DA-50 comes in at around 4+lbs. with everything.

[Big J]

So, is anybody gonna build this thing, or are we gonna talk about it for the rest of our lives?:D

[Boulder]

Now that I know I can come in under 20 lbs., I will be building this baby:D

I can't start it for a week or so, gotta' get a couple of things out of the way first.

[SleepyC]

I can't start it for a week or so, gotta' get a couple of things out of the way first.

Yea like FIRST, before the plane building you have to send me some of the "Magically showed up on my doorstep" MOJO... :)

[bodywerks]

The BME will be a great engine, but it simply AIN'T gonna balance on this beast! To find out if it would before you buy it, you can do it mathematically, using the weight X arm=moment approach. But It will likely be a waisted effort. There is way too much dead weight aft of the CG on the airframe (and forward, for that matter) to make it possible. Did you know that the bottom of the rudder is like a 2" solid block of balsa? My EF Yak, which was under 9 pounds for all the parts and hardware, was tailheavy with even a heavier DA, stock muffler, and a 4800 Fromeco hanging off the front of the firewall, over the engine case. And I guarantee you its a$$ end was lighter than this Yak. I have been eying the RCU tread on this and there are a TON of places to cut wood out, if you care to take the effort. I bet there's room to shave a full pound off...

[Boulder]

Yea like FIRST, before the plane building you have to send me some of the "Magically showed up on my doorstep" MOJO... :)

I really would like to share some of that "Magically showed up on my doorstep" MOJO, Sleepy, I really would. The only problem is I was sworn to secrecy. I really would like to help, I really would, I just am not allowed. You have no idea how sorry I am...

[Dennis C]

You better get to reading buddy. and maybe recovering :eek:

[Boulder]

The BME will be a great engine, but it simply AIN'T gonna balance on this beast! To find out if it would before you buy it, you can do it mathematically, using the weight X arm=moment approach. But It will likely be a waisted effort. There is way too much dead weight aft of the CG on the airframe (and forward, for that matter) to make it possible. Did you know that the bottom of the rudder is like a 2" solid block of balsa? My EF Yak, which was under 9 pounds for all the parts and hardware, was tailheavy with even a heavier DA, stock muffler, and a 4800 Fromeco hanging off the front of the firewall, over the engine case. And I guarantee you its a$$ end was lighter than this Yak. I have been eying the RCU tread on this and there are a TON of places to cut wood out, if you care to take the effort. I bet there's room to shave a full pound off...

I just read the entire thread on the other forum. There are some great lightening ideas in there, most of which I will be using in my build thread. I won't, however, be using only 1 servo per aileron, that 6oz. is just not that important to me, 6 oz. being 2 servos, the long extensions, and the y-harnesses.

I will be giving kudos to the proper people in my thread, no matter what forum I got the ideas from.

It appears the author handled your concern of an inaccurate wing area. I believe the true wing area is a touch larger than claimed.

I will be sticking to my ZDZ-80 for this application, I am very good at throttle management, most of the time;).

Thank you for your suggestion to look on the other forum, it was very informative and "enlightening":D

[bodywerks]

Ha, ha, you said "enlightening". It would be a lot of work, but if that's your thing, there's a pound to be lost there, not including going to CF.
Yeah, I gotta give them credit about wing area and span claims - that should be refreshing to know. Now if only they could have done that with the weight! At least pwer-to-weight won't be of any concern...

[Boulder]

Ha, ha, you said "enlightening". It would be a lot of work, but if that's your thing, there's a pound to be lost there, not including going to CF.
Yeah, I gotta give them credit about wing area and span claims - that should be refreshing to know. Now if only they could have done that with the weight! At least pwer-to-weight won't be of any concern...

You caught the "en-lightening" comment, good job:D

I'll be assembling the plane before I do the lightening tricks in the tail, just to make sure I don't have to add weight to balance with the heavy motor.

I'll be starting the build in a week or two. The thread will be on this forum, but a dedicated build thread.

[Sidewinder]

kennyandannie,

What batteries are you running? There may be some weight saving opportunities there too. 23Oz seems high. ?

With CF, dropping pants, running 4800 Li-Ion on there RX. 24oz tank, I got my WH 84" to 17# 14Oz with a ZDZ80RV on the nose. ;)

Flew it all last year with this setup. It's a fun plane. Addictive though. You are going go tlike that Yak!

[Boulder]

kennyandannie,

What batteries are you running? There may be some weight saving opportunities there too. 23Oz seems high. ?

With CF, dropping pants, running 4800 Li-Ion on there RX. 24oz tank, I got my WH 84" to 17# 14Oz with a ZDZ80RV on the nose. ;)

Flew it all last year with this setup. It's a fun plane. Addictive though. You are going go tlike that Yak!

I have edited my original post to read 16.3 oz. for my batteries, switches and extensions. My plan is to get a Fromeco set-up, or at least check their weights. I need my battery packs, total, to be close to 14 oz. with regs and switches.

It was suggested by a friend that I try to stay away from the CF tubes, he said that there have been de-laminating problems in the past, after extended use.
I guess I would like to know if that is still a problem.

[SleepyC]

DUDE try a TBM CF tube... guaranteed for life, they got guys standing on these things,
and say they are A LOT stonger then the stock tubes.

Even if you crash they are guaranteed for life! So what do you have to loose...
except weight! ;).. Oh yea and and a few $$$$ :)