Ultra Light 55% Extra 260

[walkerk122]

	Quote: Originally Posted by dmcquinn
	So do you have 16 pounds of foam now and with the lighter weight foam you will only have 12 pounds? That's the ratio of heavy foam to light foam (16/12 = 1 /.75)

My "knowledge" of foam is based on what I've been told by suppliers. What we call 1 lb and 0.75 lb, "The Industry" calls this 1 lb and 1lb Minus. I've been told that "1 lb" typically weights in the 1.2 to 1.35 lb/cf range and "1 lb Minus" weighs in the 0.6 to 0.8 lbs/cf range....I have no idea what happens to the stuff that's between .8 lbs/cf and 1.2 lbs/cf....may it's just called "Foam"

It's been awhile since I ran the calcs but if memory serves me there is about 2 cubic feet of foam per wing panel. Assuming an average in each range that represents 2.3 lbs in the wings alone.

Bob Mellen of Flying Foam just picked up the first order of foam for these today. He'll be cutting me a complete kit in the next couple days and we'll know for sure how much weight it saved.

[sensei]

	Quote: Originally Posted by walkerk122
	My "knowledge" of foam is based on what I've been told by suppliers. What we call 1 lb and 0.75 lb, "The Industry" calls this 1 lb and 1lb Minus. I've been told that "1 lb" typically weights in the 1.2 to 1.35 lb/cf range and "1 lb Minus" weighs in the 0.6 to 0.8 lbs/cf range....I have no idea what happens to the stuff that's between .8 lbs/cf and 1.2 lbs/cf....may it's just called "Foam" It's been awhile since I ran the calcs but if memory serves me there is about 2 cubic feet of foam per wing panel. Assuming an average in each range that represents 2.3 lbs in the wings alone. Bob Mellen of Flying Foam just picked up the first order of foam for these today. He'll be cutting me a complete kit in the next couple days and we'll know for sure how much weight it saved.

I have the info at the house, but I am think the wing cores came in at 2.6 lbs. each before the lightening process.

Bob

[sensei]

	Quote: Originally Posted by dmcquinn
	So do you have 16 pounds of foam now and with the lighter weight foam you will only have 12 pounds? That's the ratio of heavy foam to light foam (16/12 = 1 /.75)

I do not know what all the foam weighs at this point, but when we picked it up from Bob, it was alot of weight indeed.

Bob

[Fixed Wing]

	Quote: Originally Posted by sensei
	I do not know what all the foam weighs at this point, but when we picked it up from Bob, it was alot of weight indeed. Bob

Just as a reference point, all foam on my most recent Carden 126" weighed 52.9 ounces or 3.3 pounds. Each wing core was in the 18 ounce range. Granted this is quite a bit smaller plane but this number includes cores for both wings, stabs, fin, hatch, belly pan, turtle deck, etc. I'm not sure how even with one pound foam you'd get close to the 16 pounds previously mentioned by someone else. Just my opinion...

[Bam Bam]

Hey Bob/aerotech, can you let us know if anyone's making wing and stab bags for this little one?
would need some too, as will others.

Any more pics Bob to keep us high?
Interested in where your placing all the running gear in this.

[zoomer260]

	Quote: Originally Posted by Fixed Wing
	Just as a reference point, all foam on my most recent Carden 126" weighed 52.9 ounces or 3.3 pounds. Each wing core was in the 18 ounce range. Granted this is quite a bit smaller plane but this number includes cores for both wings, stabs, fin, hatch, belly pan, turtle deck, etc. I'm not sure how even with one pound foam you'd get close to the 16 pounds previously mentioned by someone else. Just my opinion...

Just by "eyeball" calculations seems to me a 55% could easily have double/triple the volume of foam. If not more.

I know the fuse of my 33% versus my 30% has about double the volume.

[sensei]

When these get big, the volume does go up fast.

I have been working on stuffing all the servos, linkages, and control horns. I may be able to get started on preparing everything for covering next week.

Bob

[gapple12]

	Quote: Originally Posted by sensei
	I may be able to get started on preparing everything for covering next week. Bob

[Bam Bam]

DO IT! DO IT! cant you take a week off work or something Bob?

[MikeC3D]

Man....all this technical mumbo jumbo is making my head hurt, can we just cover it and fly the damn thing....lol

[Bam Bam]

Mike, your just a lucky bugger being able to see Bob's work and have him lighten ur planes for you!
The rest of us need the technical mumbo, to try really hard to recreate Bob's work while making a big mess of it!!!

[2walla]

Hi Bob, As always you have done your homework! I guess I am still leery of contact adhesive.. I still have flashbacks of inflight failure on a quickie years ago w/contact adhesive.. Take care!! Hope this cold spell doesn't make it down there, It is 3F right now up here.. Worst thing is we don't have enough snow to snowmobile yet either...Take care! Mike

[greg e]

	Quote: Originally Posted by Bam Bam
	Mike, your just a lucky bugger being able to see Bob's work and have him lighten ur planes for you! The rest of us need the technical mumbo, to try really hard to recreate Bob's work while making a big mess of it!!!

Bam it is nice to drive a few miles to go see what he is doing in his garage. It's even better when Bob helps a lot of us out with our planes and such. But you can't go wrong learning what Bob has to teach. I wish I could remember 1/3 of what he has forgotton over the years lol.

[sensei]

	Quote: Originally Posted by Bam Bam
	DO IT! DO IT! cant you take a week off work or something Bob?

I wish I could take some time off buddy, but right now we have over 400 aerospace jobs going, and I am involved in all of them in one way or another, so you know what they say: No rest for the wicked. LOL

Bob

	Quote: Originally Posted by 2walla
	Hi Bob, As always you have done your homework! I guess I am still leery of contact adhesive.. I still have flashbacks of inflight failure on a quickie years ago w/contact adhesive.. Take care!! Hope this cold spell doesn't make it down there, It is 3F right now up here.. Worst thing is we don't have enough snow to snowmobile yet either...Take care! Mike

Oh I remember those days too my old friend, but we sure had some fun together back in the old days flying at the lake all those years ago.

Bob

	Quote: Originally Posted by greg e
	Bam it is nice to drive a few miles to go see what he is doing in his garage. It's even better when Bob helps a lot of us out with our planes and such. But you can't go wrong learning what Bob has to teach. I wish I could remember 1/3 of what he has forgotton over the years lol.

Thanks Greg, but I am always happy to help anyone that needs a helping hand.

Bob

[zbra54]

Thanks Greg, but I am always happy to help anyone that needs a helping hand.

Bob[/quote]

Great!!!!! Will you build me one of these????