RE: Goldberg Ultimate 10-300 build

RE: Goldberg Ultimate 10-300 build
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RE: Goldberg Ultimate 10-300 build - 3/25/2006 12:31:25 AM

ysrcflyer

Posts: 215
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From: Plover, WI, USA
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It is soft annealled copper for hooking up manual oil psi gauges. I can get the part# tommorow if you want.

(in reply to rangerman)

Post #: 176

RE: Goldberg Ultimate 10-300 build - 3/25/2006 2:56:31 AM

RVM

Posts: 1975
Joined: 3/12/2006
From: Sacramento, CA, USA
Status: offline

Just ordered my Saito FA-125a.

Hopefully I can relearn how to fly and be in another Ultimate by mid-summer!

Lots of great info here in your thread for when I start on my kit.

I was wondering if you had thought of anything you could do to make your plane lighter? My last CG kit, 10 years or so ago, was a Super Chipmunk. I was able to get the weight down around 7.5lbs AUW, but I was not a great builder. Hopefully I can keep the Ultimate at 7lbs or so, AUW. What have you done to keep your plane so light? I was planning on microservers, Li-Po batteries, kevlar, carbon fiber etc. to help. Maybe even replace some of the wood with lighter forms. Can you imagine this plane with the 1.25 around 7lbs? Heck, I am thinking that even at your estimated 8lbs AUW it will hover at 1/2 or 3/5 throttle, with the right prop. Well, maybe not quite, but you get the point!

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There is no substitution for human competition.

(in reply to tuwood)

Post #: 177

RE: Goldberg Ultimate 10-300 build - 3/25/2006 4:40:23 AM

rangerman

Posts: 449
Joined: 5/18/2004
From: Fort Worth, TX, USA
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I found it and got it installed in the exhaust. I used copper tubing from Ace Hardware used for air conditioning. It's a little thick though. I think I can test it this weekend.

(in reply to ysrcflyer)

Post #: 178

RE: Goldberg Ultimate 10-300 build - 3/25/2006 5:46:12 AM

tuwood

Posts: 840
Joined: 11/20/2005
From: Omaha, NE, USA
Status: offline

quote:

ORIGINAL: RVM

Just ordered my Saito FA-125a. Hopefully I can relearn how to fly and be in another Ultimate by mid-summer! Lots of great info here in your thread for when I start on my kit.

I was wondering if you had thought of anything you could do to make your plane lighter? My last CG kit, 10 years or so ago, was a Super Chipmunk. I was able to get the weight down around 7.5lbs AUW, but I was not a great builder. Hopefully I can keep the Ultimate at 7lbs or so, AUW. What have you done to keep your plane so light? I was planning on microservers, Li-Po batteries, kevlar, carbon fiber etc. to help. Maybe even replace some of the wood with lighter forms. Can you imagine this plane with the 1.25 around 7lbs? Heck, I am thinking that even at your estimated 8lbs AUW it will hover at 1/2 or 3/5 throttle, with the right prop. Well, maybe not quite, but you get the point!

I honestly didn't do much of anything to lighten her up other than buying foam wheels & a plastic spinner. I did do a lot of pre-covering balancing to make sure I didn't have to add any weight to get the CG right later.
I'll certainly post what my final weight is, I'm just hoping it will be 8. It will probably be 15 with all the monokote trim I put on.

As for what I could suggest to lighten it up.... Obviously going with lighter sheeting would save a few ounces, but I'm not sure how that impacts strength. The whole build seemed pretty light from my limited experience. I couldn't really see where I could cut any wood out to lighten it up.

I should have it all together this weekend, so we'll know soon enough.

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Post #: 179

RE: Goldberg Ultimate 10-300 build - 3/25/2006 5:56:00 AM

tuwood

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Joined: 11/20/2005
From: Omaha, NE, USA
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OK, I'm pretty much done covering. I still have to add a few decal's, but I figured I'd throw it together on the floor so you could all get a peek at what it looks like together. (once again, no laughing)

I was a little dissapointed in the checkers on the front. I spent most of last night trying to cut out stretched checkers to blend from the normal checkers on top into the black pin stripe on the side. lets just say I settled with the solid black trim piece because it was a disaster...

Let me know what you guys think.

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_____________________________

I know what I don't know and I know it very well

(in reply to tuwood)

Post #: 180

RE: Goldberg Ultimate 10-300 build - 3/25/2006 1:36:54 PM

RVM

Posts: 1975
Joined: 3/12/2006
From: Sacramento, CA, USA
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Your plane looks really good! You'd better get someone to make some videos of your first flights!

What building surface did you use? I don't really have the money to go with a full magnetic set up so I'll be using pins just as I always have. I used to use styrofoam under the plans. It looks like you used drywall sheeting or something in the pics. I can't tell what it is. How did you get it perfectly flat?

quote:

ORIGINAL: tuwood

OK, I'm pretty much done covering. I still have to add a few decal's, but I figured I'd throw it together on the floor so you could all get a peek at what it looks like together. (once again, no laughing)

I was a little dissapointed in the checkers on the front. I spent most of last night trying to cut out stretched checkers to blend from the normal checkers on top into the black pin stripe on the side. lets just say I settled with the solid black trim piece because it was a disaster...

Let me know what you guys think.

_____________________________

There is no substitution for human competition.

(in reply to tuwood)

Post #: 181

RE: Goldberg Ultimate 10-300 build - 3/25/2006 8:29:11 PM

tuwood

Posts: 840
Joined: 11/20/2005
From: Omaha, NE, USA
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quote:

ORIGINAL: RVM

Your plane looks really good! You'd better get someone to make some videos of your first flights!

Thanks. I've already got a friend of mine lined up to take video of the maiden.

quote:

ORIGINAL: RVM

What building surface did you use? I don't really have the money to go with a full magnetic set up so I'll be using pins just as I always have. I used to use styrofoam under the plans. It looks like you used drywall sheeting or something in the pics. I can't tell what it is. How did you get it perfectly flat?

My work bench surface is topped with 3/4" MDF which is very flat and smooth. I then bought a couple smooth drop ceiling tiles from Menards to lay on top to give me something to stick my pins into. It works real well.
The real key is to get a very flat work surface. You'll see that many people buy a hollow core door & lay it on their bench for a flat surface. I've heard of others using an old glass table top too.

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Post #: 182

RE: Goldberg Ultimate 10-300 build - 3/26/2006 6:20:56 PM

tuwood

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I was able to get everything done except the wheel pants & the aileron linkages yesterday. I need to make one more trip to the LHS today becuase I have to get one more pair of ball connectors for the aileron servo's.

Well my wishful thinking on the weight was just that.

My final weight was exactly 9 lbs. fully assembled (threw the wheel pants on the scale too). I did go with a larger 6V 2000mah batter which weighs about 4 ounces more than the 1200 mah I weighed it with earlier. The APC prop is also pretty heavy. I could probably kill half a pound by using a smaller battery & a wooden prop, but I'll leave everything as is unless it won't take off from being too heavy.

Becuase I'm using dual elevator servos I taped a couple of straight straws on the elevators to make sure they were in sync all the way up & down. The digital servo's were dead on, I didn't have to adjust anything.

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_____________________________

I know what I don't know and I know it very well

(in reply to tuwood)

Post #: 183

RE: Goldberg Ultimate 10-300 build - 3/26/2006 7:07:47 PM

RVM

Posts: 1975
Joined: 3/12/2006
From: Sacramento, CA, USA
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So when are you going to fly it?

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Post #: 184

RE: Goldberg Ultimate 10-300 build - 3/26/2006 11:02:08 PM

rangerman

Posts: 449
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From: Fort Worth, TX, USA
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9 lbs! Ugh! Oh well they should still fly well. How did your CG turn out?
The covering looks great, I bet it will show up good.
I'm breaking in my engine today. I capped off the smoke oil lines and ran it at five turns out at 3500 RPM for a tank of fuel with the glow ignitor on the whole time. I just charged the glow ignitor and I'm off to tune it a little closer for 2 more tanks and then the smoke test.

(in reply to tuwood)

Post #: 185

RE: Goldberg Ultimate 10-300 build - 3/27/2006 3:09:36 AM

rangerman

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From: Fort Worth, TX, USA
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I added the new nipple on the exhaust. The new one is for the tank because it's ahead of the oil outlet inside.

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Post #: 186

RE: Goldberg Ultimate 10-300 build - 3/27/2006 3:10:54 AM

R/C Lee

Posts: 157
Joined: 12/21/2002
From: Black Butte Ranch, OR, USA
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