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troppo · 05-31-2003, 04:37 AM

hiya guys
i`m only new here and to spads in general, and although i am going to build one soon(a buhor i think) i cant yet..
but i have been thinking, this might be a little weird but i was just wondering if anyone has built a large enough scale spad to use a whipper snipper moter (i think you call them strimmers over there)
just a weird thought (i seem to have more than my share of then according to the wife

i am really impressed by the planes i`ve seen here and hope to one day be able to show off one of my own
cheers
troppo

nony · 05-31-2003, 07:59 AM

Welcome to RCCanada....how did you happen to find us?

The biggest coroplast plane I have seen is a 1/5 scale cub.
It did not fly too well. I think you lose the advantages of coroplast when you start getting into longer wingspans and built up structures.

It could possibly be done by someone willing to experiment....

troppo · 05-31-2003, 08:34 AM

hiya wayne
i found you guys quite by accident, i was surfing the web and found one of the spad sites, i`ve always loved r/c planes and they had a link to this forum.
i`ve been lurking for a week or so and learning a heap during that time, i thought i might introduce myself and see what you thought of my weird idea.
thanks for your thoughts on the matter, might have to look at the strength issue lol
cheers
troppo

AJCoholic · 05-31-2003, 09:52 AM

Hello!

I have also been thinking about alarger scale SPAD. I guess it boils down to a few things...

overall weight vs wing area vs engine power

I assume you are going to use something like a 25cc to 35cc engine? That size engine seems to fly best (in my experience) with something in the 16 pound weight (for sport aerobatic flying) with a max wing loading of 25 to 35 ounces per square foot. So you are looking at something with a wing (assuming a rectangular wing) of about 80" span and about 18" chord.

If you can keep the weight down to 15 or 16 pounds, and keep it stiff enough not to have excessive flex there shouldnt be any reason why it cant be done.

You could use some foam for instance, in the wing to stiffen up the structure. Cut your ribs from 1/2" thick styrofoam and use a foam safe spray adhesive to put the works together. Even a built up box spar would be strong and very stiff. I see no reason not to combine some traditional building techniques with the newer coroplast/plastic stuff to suit your needs.

Tattoo · 05-31-2003, 01:16 PM

I've never even owned an engine larger than a .47...so I've got zero experience with larger Spads...but there is a lot of action in that direction:
http://spadworld.net/viewforum.php?f...d8957fce4e56d9

Here's one of the coolest ones I've seen:
http://www.rcuniverse.com/showthread...66&forumid=235

And then you have the big Car that showed up at Spadfest!
http://members.cox.net/spadfest/bigcarthing4.jpg

And Chris's Corocap
http://members.cox.net/spadfest/spadfest22.jpg

Frank's Big Ugly Gasser On rails
http://home.earthlink.net/~plasticwi...ges/Bugor1.JPG

Jeff's Big Pig
http://members.cox.net/spadfest/spadfest09.jpg

Chris's CubLikeThing
http://members.cox.net/spadfest/cltchris.jpg

Extream Rail shown next to a standard BUHOR
http://home.midwestinfo.net/djam/GutterRat/RailRats.jpg

AJCoholic · 05-31-2003, 03:29 PM

Those are some awesome links... I especially liked the cap!

I think ANYTHING is possible. Just becuase one guy didnt have sucess doesnt mean giant scale spads are not a possibility.

This hobby is so cool!

Now, when can I get started on my turbine powered spad....

"Coro-Reaper" anyone?!

Tattoo · 06-13-2003, 10:32 AM

Check it out...a new Giant Spad web-site just came on-line

http://spads.mattclement.com/

05-31-2003, 04:37 AM	#1
troppo Guest Join Date: May 2003 Feedback: 0 / 0% Posts: 2 Total Props: 0	S.P.IMMER ????? Remove this ad - become a site supporter! hiya guys i`m only new here and to spads in general, and although i am going to build one soon(a buhor i think) i cant yet.. but i have been thinking, this might be a little weird but i was just wondering if anyone has built a large enough scale spad to use a whipper snipper moter (i think you call them strimmers over there) just a weird thought (i seem to have more than my share of then according to the wife i am really impressed by the planes i`ve seen here and hope to one day be able to show off one of my own cheers troppo
	.

05-31-2003, 07:59 AM	#2
nony RCC Supreme Contributor Join Date: Sep 2002 Location: the Park, Ab. Feedback: 0 / 0% Posts: 4,339 Total Props: 0	Welcome to RCCanada....how did you happen to find us? The biggest coroplast plane I have seen is a 1/5 scale cub. It did not fly too well. I think you lose the advantages of coroplast when you start getting into longer wingspans and built up structures. It could possibly be done by someone willing to experiment.... __________________ Wayne The sooner you fall behind, the more time you will have to catch up.
	.

05-31-2003, 09:52 AM	#4
AJCoholic RCC Supreme Contributor I am: Andrew Coholic Join Date: Sep 2002 Location: Timmins, Northern Ontario Radio of choice: JR 12X, 28X Feedback: 47 / 100% Posts: 12,277 Total Props: 61	Hello! I have also been thinking about alarger scale SPAD. I guess it boils down to a few things... overall weight vs wing area vs engine power I assume you are going to use something like a 25cc to 35cc engine? That size engine seems to fly best (in my experience) with something in the 16 pound weight (for sport aerobatic flying) with a max wing loading of 25 to 35 ounces per square foot. So you are looking at something with a wing (assuming a rectangular wing) of about 80" span and about 18" chord. If you can keep the weight down to 15 or 16 pounds, and keep it stiff enough not to have excessive flex there shouldnt be any reason why it cant be done. You could use some foam for instance, in the wing to stiffen up the structure. Cut your ribs from 1/2" thick styrofoam and use a foam safe spray adhesive to put the works together. Even a built up box spar would be strong and very stiff. I see no reason not to combine some traditional building techniques with the newer coroplast/plastic stuff to suit your needs. __________________ Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it!
	.

05-31-2003, 03:29 PM	#6
AJCoholic RCC Supreme Contributor I am: Andrew Coholic Join Date: Sep 2002 Location: Timmins, Northern Ontario Radio of choice: JR 12X, 28X Feedback: 47 / 100% Posts: 12,277 Total Props: 61	Those are some awesome links... I especially liked the cap! I think ANYTHING is possible. Just becuase one guy didnt have sucess doesnt mean giant scale spads are not a possibility. This hobby is so cool! Now, when can I get started on my turbine powered spad.... "Coro-Reaper" anyone?! __________________ Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it!
	.

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05-31-2003, 08:34 AM	#3
troppo Guest Join Date: May 2003 Feedback: 0 / 0% Posts: 2 Total Props: 0	hiya wayne i found you guys quite by accident, i was surfing the web and found one of the spad sites, i`ve always loved r/c planes and they had a link to this forum. i`ve been lurking for a week or so and learning a heap during that time, i thought i might introduce myself and see what you thought of my weird idea. thanks for your thoughts on the matter, might have to look at the strength issue lol cheers troppo
	.

05-31-2003, 01:16 PM	#5
Tattoo Guest Join Date: Apr 2003 Feedback: 0 / 0% Posts: 112 Total Props: 0	I've never even owned an engine larger than a .47...so I've got zero experience with larger Spads...but there is a lot of action in that direction: http://spadworld.net/viewforum.php?f...d8957fce4e56d9 Here's one of the coolest ones I've seen: http://www.rcuniverse.com/showthread...66&forumid=235 And then you have the big Car that showed up at Spadfest! http://members.cox.net/spadfest/bigcarthing4.jpg And Chris's Corocap http://members.cox.net/spadfest/spadfest22.jpg Frank's Big Ugly Gasser On rails http://home.earthlink.net/~plasticwi...ges/Bugor1.JPG Jeff's Big Pig http://members.cox.net/spadfest/spadfest09.jpg Chris's CubLikeThing http://members.cox.net/spadfest/cltchris.jpg Extream Rail shown next to a standard BUHOR http://home.midwestinfo.net/djam/GutterRat/RailRats.jpg
	.

06-13-2003, 10:32 AM	#7
Tattoo Guest Join Date: Apr 2003 Feedback: 0 / 0% Posts: 112 Total Props: 0	Check it out...a new Giant Spad web-site just came on-line http://spads.mattclement.com/
	.

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