Yak 50cc Weight issues

Yak 50cc Weight issues
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Yak 50cc Weight issues - 5/12/2006 4:17:43 AM

flatlandmike

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Joined: 10/6/2003
From: lexington, KY, USA
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Whats the deal with my yak coming out at 18 pounds and i used every thing with weight savings in mind along with cutting wood away form the plane. The only thing used that isnt the lightest is my slimline pitts wich you used in you show plane I didnt even apply the vinyl yet or use the wheel pants.

With this weight the plane doesnt have the ability to fly an up line without losing speed with a da50

< Message edited by flatlandmike -- 5/12/2006 9:40:17 PM >

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RE: Yak 50cc brick - 5/12/2006 5:56:08 AM

jeide

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Joined: 1/12/2002
From: parker, CO, USA
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.

< Message edited by jeide -- 5/15/2006 10:43:21 PM >

(in reply to flatlandmike)

Post #: 2

RE: Yak 50cc brick - 5/12/2006 5:59:06 AM

flatlandmike

Posts: 1146
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From: lexington, KY, USA
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With the effort i put into keeping all parts light i thought worst case would be 17# but hoping for 16.5 or lower

< Message edited by flatlandmike -- 5/12/2006 6:03:14 AM >

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Special thanx to The Crew Mike B. Jim Z. Ed J. Jim S.

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RE: Yak 50cc brick - 5/12/2006 6:02:16 AM

flatlandmike

Posts: 1146
Joined: 10/6/2003
From: lexington, KY, USA
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i dont know about the 15 pound but if i have some puch out i would be happy

The wing loading on this weight isnt any thing to complain about plane flew fine and dandy. I need to have that punch out to hover and torg roll low.

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Special thanx to The Crew Mike B. Jim Z. Ed J. Jim S.

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RE: Yak 50cc brick - 5/12/2006 9:29:18 AM

bodywerks

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From: Tucson, AZ, USA
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I would be interested to see pics of your equipment install, as well as a list of the components you installed. "not adding any dead weight" means different things to different people.
Is the engine new? If so, it has some power to be gained.
Is it humid in Kentucky? If so, then your airplane will weigh more because the wood will never dry out.
What kind of scale did you use?
What brand and size prop are you using?

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RE: Yak 50cc brick - 5/12/2006 5:57:38 PM

Flyin Hawaiian

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Joined: 4/28/2005
From: Orlando, FL, USA
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One of my flying buds has this airplane, came in at 17 lbs w/ DA50R. Wonderful flying airplane and seemed to fly very light on the sticks. He did tear out the landing gear when he hit a little pot hole on the runway. The Landing gear block appeared to be minimal at best and that he will have to beef it up so it will not tear out again. He will most likely gain a little more weight. Myself I had a Aerotech Velox w/ smoke. It did fly heavy at first (18 lbs!!). But when the engine got broke in, I switched to a Mehjlik 23-8 and 100:1 Amsoil, and it flew awesome. Since then I have removed the smoke system, plane weighs 17 lbs and is a wonderful IMAC and 3D airplane. By the way, the DA50 is rated for airplanes in the 15 to 18 LB range.

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RE: Yak 50cc brick - 5/12/2006 9:13:26 PM

flatlandmike

Posts: 1146
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From: lexington, KY, USA
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heres some pics but im interested in what Aero works has to say

da50 da standoffs stock da ign
slimlinepiutts
menz 22/8 prop
aluminum fender washers to save weight over steel fender washer
3 8611
2 5945
1 hs225mg throtle
stock control horns with sockey head servo screws
stok fuel tank 2 line with t and smal weight fuel dot not heavy da fuel dot or anything like that
carbon tail wheel 1.2 oz lighter than stock with 2 screws not 3
3 mpi mircale switch s 1 oz per
jr r2000 synth rx
fromeco 4800 battery yes big but only 3 oz bigger gets me redundency
li-on 2000 mah ign battery
didnt have a good pik but theres 2 more jtec wire locks in the turtl deck holding wires down
1 ign kill module weighs .3 oz including servo wires
true turn 3.5 inch spinner with lighten back plat totals 3 oz
no wheel pants
no graphix with this weight
no extra glue any were
aluminum mpi servo arms urfaces and blu hitec servo arm throtle

Attachments

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< Message edited by flatlandmike -- 5/12/2006 9:20:31 PM >

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RE: Yak 50cc brick - 5/12/2006 9:44:11 PM

flatlandmike

Posts: 1146
Joined: 10/6/2003
From: lexington, KY, USA
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I changed the title because it created an undesired negative connotation

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RE: Yak 50cc Weight issues - 5/13/2006 12:13:57 AM

bodywerks

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From: Tucson, AZ, USA
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"fromeco 4800 battery yes big but only 3 oz bigger gets me redundency"
I am confused by this statement. By "gets me redundancy", do you mean that you have two Fromeco 4800's? That's the only way it could be redundant, as far as a power goes. If that's the case then the extra battery actually adds over 1/2 pound, not just 3 ounces (6.6 oz for the battery, 1.5 for the regulator, 1 or so for that "miracle" switch,, and another ounce or two for all the extra wiring and foam and velcro). You could have gone with two 2400's and still had redundancy and saved 1/2 pound. Those miracle switches are also an ounce heavier, each, than the stock switches that come with the regulators.
"1 ign kill module weighs .3 oz including servo wires "
If it is a Smart-fly or electrodynamics, the RX unit and tx unit weigh .3 ounces each, not total, and I am not sure they include the wire in their claimed weight - not that that would explain the extra pound of weight you have. And if you do have a smart-fly cutoff, you don't need a switch - that'll save you another ounce
I also see a TON of extra wire all bundled up in there that probably doesn't need to be there. That will add 3-4 ounces in a hurry.
It also appears that Kentucky averages 50-70% humidity, so you probably have an extra 4-8 ounces in water weight compared to here, for example, where we are lucky to get 15%.

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RE: Yak 50cc Weight issues - 5/13/2006 12:19:36 AM

bodywerks

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From: Tucson, AZ, USA
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I can also tell you what Aeroworks will say. They will say that with any ARF, where wood is not hand-selected and individually weighed, and the amount of glue used depends on the person building it and what day of the week it was built, the kit weights will vary. On a plane this size, it can mean as much as a pound or more. It sucks, but unless you are willing to build yourself, it is one of the risks you take when you get an ARF. And believe me, I am very aware of it, and I still complain, too!

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RE: Yak 50cc Weight issues - 5/13/2006 2:07:21 AM

flatlandmike

Posts: 1146
Joined: 10/6/2003
From: lexington, KY, USA
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[qu

< Message edited by flatlandmike -- 5/13/2006 2:30:16 AM >

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Post #: 11

RE: Yak 50cc Weight issues - 5/13/2006 2:27:40 AM

flatlandmike

Posts: 1146
Joined: 10/6/2003
From: lexington, KY, USA
Status: offline

quote:

ORIGINAL: bodywerks

"fromeco 4800 battery yes big but only 3 oz bigger gets me redundency"
I am confused by this statement. By "gets me redundancy", do you mean that you have two Fromeco 4800's? That's the only way it could be redundant, as far as a power goes. If that's the case then the extra battery actually adds over 1/2 pound, not just 3 ounces (6.6 oz for the battery, 1.5 for the regulator, 1 or so for that "miracle" switch,, and another ounce or two for all the extra wiring and foam and velcro). You could have gone with two 2400's and still had redundancy and saved 1/2 pound. Those miracle switches are also an ounce heavier, each, than the stock switches that come with the regulators.
"1 ign kill module weighs .3 oz including servo wires "
If it is a Smart-fly or electrodynamics, the RX unit and tx unit weigh .3 ounces each, not total, and I am not sure they include the wire in their claimed weight - not that that would explain the extra pound of weight you have. And if you do have a smart-fly cutoff, you don't need a switch - that'll save you another ounce
I also see a TON of extra wire all bundled up in there that probably doesn't need to be there. That will add 3-4 ounces in a hurry.
It also appears that Kentucky averages 50-70% humidity, so you probably have an extra 4-8 ounces in water weight compared to here, for example, where we are lucky to get 15%.

I order my batteries with 2 jr leads so i don’t have to worry about one switch and reg going bad the odds of 2 going bad at same time are acceptable to me

The 4800 is self redundant if one cell goes bad the bat runs on just 2 so there’s the redundancy call and ask Kurt about it if you want to know more so like i said 3 oz i have taken out far more than that on this plane there’s no extra wires as the switches and battery are close enough to not need it

I gave you accurate weights on every thing as weighed by me with that scale including the kill switch which is super light and ill get a link for you and others as it is a great little add on to lose the choke servo for an extra engine kill

Miracle switch 1 oz normal switch and reg 2 plus ozs

There is no more wires there than are stated as needed in the manual that would put the battery were it is in the manual there’s some wire rolled up next to the rx (ele wire)but is what would be needed to put the rx were every one else’s rx is 2 more inches to the right and 2 more inches up

Do you know how much Velcro you would need to use to get an ounce i used less Velcro than the zip ties the manual said to use so i saved weight with those each peice of velcro i used was less weight than ech zip tie

I didn’t use the wheel pants 5 to 6 oz weight savings could be more including hardware

So like i said besides the battery and muffler wares the extra weight

This is a real issue and i dont know why some one from Aero-works hasnt addressed it

PS: believe me there’s nothing that went in this plane with out me mulling over the weight effect and this gear is the very same gear i used in my 28% wild hare extra that weighed 16.5# with the fiberglass gear and carbon tube

< Message edited by flatlandmike -- 5/13/2006 2:31:24 AM >

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www.jerseymodeler.com
Special thanx to The Crew Mike B. Jim Z. Ed J. Jim S.

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Post #: 12

RE: Yak 50cc Weight issues - 5/13/2006 2:35:12 AM