Log in
Search
Latest topics
» *Cox Engine of The Month* Submit your pictures! -October 2024-by roddie Today at 12:22 pm
» Off topic - Tonka dump truck restoration. 10:27
by roddie Today at 11:58 am
» Internet buy
by rdw777 Today at 11:38 am
» I Got Cheated!
by roddie Today at 11:27 am
» Fox .35 Modifications
by BillpointBilly Today at 8:28 am
» Venom Frog
by BillpointBilly Today at 8:26 am
» Carburetor Sprinkler Rod Peak Tee Dee .049 / .051
by BillpointBilly Today at 8:18 am
» Sterlings and Guillows Nieuport 28's
by rsv1cox Today at 7:49 am
» Wen Mac Aeromite/Challenger
by GallopingGhostler Today at 7:29 am
» PSA propellors!!!
by getback Today at 6:55 am
» Wanted peewee 20 fuel tank
by rdw777 Today at 5:39 am
» Cox 020 PeeWee rebuild questions
by balogh Yesterday at 1:01 pm
Cox Engine of The Month
Foam hand kids glider converted to 0.049 CL
Page 2 of 2
Page 2 of 2 • 1, 2
Re: Foam hand kids glider converted to 0.049 CL
I find it interesting that Andrew, Rod's friend down under uses no nitro fuel on his Cox. I never tried this before, because use of no nitro fuel is virtually unheard of in the circles (pun intended) I flew with, all used nitro to varying degrees, due to its availability here in the Continent. Also, I didn't know it was possible. It also may explain why Andrew had good success flying his powered glider creation. Under reduced power helped it to match up with the reduced wing area.
GallopingGhostler- Top Poster
-
Posts : 5607
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
Re: Foam hand kids glider converted to 0.049 CL
Oh wow is there some exiting stuff going on with these hand bomb foamies.
Thanks for connecting with thd builder, oldenginerod.
I actually found one of these foamies things in our shed yesterday.
Here is another photo of the stiffening and control layout.
I kinda want to build a pile of these and hand them out / get folks in the air when the public stops to chat with us when we are flying.
Thanks for connecting with thd builder, oldenginerod.
I actually found one of these foamies things in our shed yesterday.
Here is another photo of the stiffening and control layout.
I kinda want to build a pile of these and hand them out / get folks in the air when the public stops to chat with us when we are flying.
layback209- Gold Member
- Posts : 282
Join date : 2017-10-13
Age : 38
Location : Okotoks
belcrank on cg?
Never designed a cl model before so would like to know if the cg for cl models is the same as "free flight"?
The one sold by lidl glides well with about 5g added weight resulting in a cg 30mm from the leading edge.
Is that where the bellcrank (the goldberg 1/2A one) should be mounted?
And then have the leadout guide the same spacing as the bellcrank ?
I am wondering if the long strip "spar" can be replaced with glassfibre tape and then the whole wing/fuse with thin clear packing tape.
(like the "ZAGI" used to be)
Might get a third one and just "give it a go" like the natives here like to say
The one sold by lidl glides well with about 5g added weight resulting in a cg 30mm from the leading edge.
Is that where the bellcrank (the goldberg 1/2A one) should be mounted?
And then have the leadout guide the same spacing as the bellcrank ?
I am wondering if the long strip "spar" can be replaced with glassfibre tape and then the whole wing/fuse with thin clear packing tape.
(like the "ZAGI" used to be)
Might get a third one and just "give it a go" like the natives here like to say
cmulder- Gold Member
- Posts : 279
Join date : 2022-02-10
Re: Foam hand kids glider converted to 0.049 CL
Control line planes are normally a bit more nose heavy than RC or FF. Maybe 20% of the chord. The leadouts can be fairly close together, maybe 10mm or so, any closer they could maybe bind with each other. Not so important to have them too far apart as when doing stunts the back one will bank out more than the other direction banking in. (bad) Start about half way back to allow for the line drag. Where the bellcrank is mounted is not as important as the leadout guide, but halfway in the chord is fine, mostly just so it will not bind or bend the leadouts too far. My flea fright one was very tail heavy and did not fly well. I put a bolt in the front for nose weight and then it seemed like it needed more dihedral. May be better to be control line. Never tried the cheaper white foam one, not sure if I have one, may have to search. I have some of the bigger ones, and had considered electric. I like the option of aborting the landings, and we have a height limit here of 400 ft. For the strip stiffening the wing, IDK if the fiberglass tape would make a lot of strength difference because the wing is pretty thin. I thought maybe the birch edge banding strips for shelves might be something to try. It is the iron on type. Of course you could try it with nothing and see if it is needed. What is the worst that could happen? Lose a bit of glue or $7?cmulder wrote:Never designed a cl model before so would like to know if the cg for cl models is the same as "free flight"?
The one sold by lidl glides well with about 5g added weight resulting in a cg 30mm from the leading edge.
Is that where the bellcrank (the goldberg 1/2A one) should be mounted?
And then have the leadout guide the same spacing as the bellcrank ?
I am wondering if the long strip "spar" can be replaced with glassfibre tape and then the whole wing/fuse with thin clear packing tape.
(like the "ZAGI" used to be)
Might get a third one and just "give it a go" like the natives here like to say
aspeed- Platinum Member
- Posts : 795
Join date : 2013-01-18
Location : Leamington Ont. Can.
Re: Foam hand kids glider converted to 0.049 CL
As promised, here's more shots of the plane.
As I recall, nose was cut off square 95mm from the tip. Engine has no offset.
Note the two pegs on the rear of the engine mount in the drawing. These slot into corresponding holes in the fuse and everything is glued with 5 minute Epoxy. Rudder has a little offset as pictured.
Landing gear is just sandwiched between two pieces of ply and glued into a slot cut in the lower half of the fuse. Andrew tells me that this thing has smacked the ground very hard on a few occasions and has come out completely unscathed. I had a theory that the gear would snag the grass and break the fuse in half- That hasn't happened.
The effect of Nitro on the foam hasn't been tested as Andrew uses no Nitro. Otherwise, fuel has so far had no ill effects on the foam.
Note wing and stab have ply bracing. Bellcrank mount appears recessed into the wing and Andrew says it's located one third way back from the leading edge.
Elevators are joined with a piece of bent wire and hinged on stadard type Du-Bro hinges. Not a ply tail skid has been added. Note that excess material from the removed nose has been carved to neatly fill the upper stabiliser slot. Apparently a small amount of lead has been added to the tail. If the same dimensions were used, maybe a 5cc Babe Bee tank would balance just right rather than Andrew's 8cc one.
Many at Andrew's club were sceptical and gave him a hard time when he first tried to explain the concept. His maiden flight shut them up.
It is very light, very stable, very aerobatic, very cheap and very durable. What more could you ask for??
His comment was also that because balsa is getting harder to source, this isn't a bad alternative.
Here's a challenge guys. Who'll be the first on CEF to complete and demonstrate their own version?
Rod.
As I recall, nose was cut off square 95mm from the tip. Engine has no offset.
Note the two pegs on the rear of the engine mount in the drawing. These slot into corresponding holes in the fuse and everything is glued with 5 minute Epoxy. Rudder has a little offset as pictured.
Landing gear is just sandwiched between two pieces of ply and glued into a slot cut in the lower half of the fuse. Andrew tells me that this thing has smacked the ground very hard on a few occasions and has come out completely unscathed. I had a theory that the gear would snag the grass and break the fuse in half- That hasn't happened.
The effect of Nitro on the foam hasn't been tested as Andrew uses no Nitro. Otherwise, fuel has so far had no ill effects on the foam.
Note wing and stab have ply bracing. Bellcrank mount appears recessed into the wing and Andrew says it's located one third way back from the leading edge.
Elevators are joined with a piece of bent wire and hinged on stadard type Du-Bro hinges. Not a ply tail skid has been added. Note that excess material from the removed nose has been carved to neatly fill the upper stabiliser slot. Apparently a small amount of lead has been added to the tail. If the same dimensions were used, maybe a 5cc Babe Bee tank would balance just right rather than Andrew's 8cc one.
Many at Andrew's club were sceptical and gave him a hard time when he first tried to explain the concept. His maiden flight shut them up.
It is very light, very stable, very aerobatic, very cheap and very durable. What more could you ask for??
His comment was also that because balsa is getting harder to source, this isn't a bad alternative.
Here's a challenge guys. Who'll be the first on CEF to complete and demonstrate their own version?
Rod.
Oldenginerod- Top Poster
- Posts : 4009
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
Re: Foam hand kids glider converted to 0.049 CL
I think it's about time to give this project some more consideration.
About as far as I got was to purchase the glider. No progress beyond that I'm afraid.
About as far as I got was to purchase the glider. No progress beyond that I'm afraid.
Oldenginerod- Top Poster
- Posts : 4009
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
Re: Foam hand kids glider converted to 0.049 CL
Cool Rod we need another project ! I got one I am trying to work on off and on will put it out here when I get a little more done , been taking a few pics .
getback- Top Poster
-
Posts : 10376
Join date : 2013-01-18
Age : 67
Location : julian , NC
rsv1cox- Top Poster
-
Posts : 11065
Join date : 2014-08-18
Location : West Virginia
Re: Foam hand kids glider converted to 0.049 CL
This thread reminded me of a glider that I bought ($5.99) at my local Ocean State Job Lot store. These G.I. Joe (Hasbro) gliders were probably part of a buyout from bigger-name retail stores.
The wingspan is 19" on these.. yet the design/shape/mold-marks look very similar to the 15" version. Maybe just scaled-up a click or two..
The LED's are a cool option.. but I think they'd have to be removed due to the necessary shortening of the nose.
Given the swept L/E.. I calculate the wings' area to be around 64 to 65 sq. in.
The stabilizer's area is approx. 17 to 18 sq. in. as-is. I'm wondering if a stabilator (rather than an elevator..) might be something to try on this one.
The wingspan is 19" on these.. yet the design/shape/mold-marks look very similar to the 15" version. Maybe just scaled-up a click or two..
The LED's are a cool option.. but I think they'd have to be removed due to the necessary shortening of the nose.
Given the swept L/E.. I calculate the wings' area to be around 64 to 65 sq. in.
The stabilizer's area is approx. 17 to 18 sq. in. as-is. I'm wondering if a stabilator (rather than an elevator..) might be something to try on this one.
Last edited by roddie on Fri Jul 26, 2024 2:16 pm; edited 1 time in total (Reason for editing : panel measurements in sq. in.)
Re: Foam hand kids glider converted to 0.049 CL
Interesting thread to repurpose the foam plane into a Cox powered powered machine….. Would certainly be tuff!…. The kicker may be if the foam would stand up the fuels with nitro we commonly use here….. I used a white styrofoam wing from a Hobby Lobby toy glider on a Cox powered glider that was coated with spar varnish and is holding up well….Also, After the wing was coated it got quite a bit stiffer….. Maybe it would work on this other type of foam as well?….
rdw777- Diamond Member
-
Posts : 1591
Join date : 2021-03-11
Location : West Texas
Re: Foam hand kids glider converted to 0.049 CL
rdw777 wrote:Interesting thread to repurpose the foam plane into a Cox powered powered machine….. Would certainly be tuff!…. The kicker may be if the foam would stand up the fuels with nitro we commonly use here….. I used a white styrofoam wing from a Hobby Lobby toy glider on a Cox powered glider that was coated with spar varnish and is holding up well….Also, After the wing was coated it got quite a bit stiffer….. Maybe it would work on this other type of foam as well?….
I think that this "EPO" airframe may be "stable" as far as nitromethane is concerned. I've wanted to try flying an "RTP" model here at home... but there's not much real-estate to work with. A durable airframe would lend itself well to that venture I think.
It would be interesting to try to trim the model to fly level via sensing its pitch.. and correcting through elevator inputs.. as a pilot would; through the use of the stick.
Re: Foam hand kids glider converted to 0.049 CL
I am surprised that spar varnish didn't eat the foam up
getback- Top Poster
-
Posts : 10376
Join date : 2013-01-18
Age : 67
Location : julian , NC
davidll1984- Diamond Member
- Posts : 2318
Join date : 2020-02-12
Age : 39
Location : shawinigan
My attemptat a conversion
This conversion is an intriguing idea, but I had never seen one of the gliders. Then I just stumbled onto a display of them at Ace Hardware, of all places. There were 2 sizes, I bought one of the larger ones. Wingspan is 19". I'm guessing the area is about 50-60 sq. in.
So, I started thinking about how to make one fly CL. Andrew has already proven it will work with an .049, how about an .020. Instead of cutting off the nose, why don't we run with the glider concept, and make a powered glider with a pylon mounted engine? So after a bit of thrashing & bashing about, this is where I ended up. I used the 3-bladed prop because it offered the smallest diameter, therefore the shortest possible pylon.
The pylon is balsa, covered with Monokote. I dabbed on some blue paint spots to sort of match the foam.
The glider had 2 stabilizer slots, presumably the upper one is to make it fly loops. I didn't like the look of the extra slot, so I cut it out and glued the fin back on.
With the engine mounted so far back, it was very tail heavy. I added some .44 cal. nose weight, it took 1-1/4 oz.
The final weight came to 4.2 oz.
So, I started thinking about how to make one fly CL. Andrew has already proven it will work with an .049, how about an .020. Instead of cutting off the nose, why don't we run with the glider concept, and make a powered glider with a pylon mounted engine? So after a bit of thrashing & bashing about, this is where I ended up. I used the 3-bladed prop because it offered the smallest diameter, therefore the shortest possible pylon.
The pylon is balsa, covered with Monokote. I dabbed on some blue paint spots to sort of match the foam.
The glider had 2 stabilizer slots, presumably the upper one is to make it fly loops. I didn't like the look of the extra slot, so I cut it out and glued the fin back on.
With the engine mounted so far back, it was very tail heavy. I added some .44 cal. nose weight, it took 1-1/4 oz.
The final weight came to 4.2 oz.
duaneh- Gold Member
- Posts : 223
Join date : 2019-04-06
Re: Foam hand kids glider converted to 0.049 CL
Duane, a very nice Pee Wee conversion of this off-the-shelf glider, to include your custom pylon that except for the slightly darker orange, looks like it was produced by the company. Also love the single wheel landing gear that looks very glider like. The 3 blade prop adds a touch of class.
GallopingGhostler- Top Poster
-
Posts : 5607
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
Re: Foam hand kids glider converted to 0.049 CL
Actually, this configuration would probably make a decent free-flight model.
Oldenginerod- Top Poster
- Posts : 4009
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
Re: Foam hand kids glider converted to 0.049 CL
Beautiful work on the pod. It's amazing how well the Monokote did on those compound curves. Even more amazing that you were able to pull it off.
rsv1cox- Top Poster
-
Posts : 11065
Join date : 2014-08-18
Location : West Virginia
Re: Foam hand kids glider converted to 0.049 CL
Really nice job on motorizing the plane and keeping the glider flavor….Looks like it would be a good flyer in that configuration
rdw777- Diamond Member
-
Posts : 1591
Join date : 2021-03-11
Location : West Texas
Page 2 of 2 • 1, 2
Similar topics
» Hand launched balsa glider memories?
» foam chuck glider, rc conversion
» For the Kids
» Cox Converted Diesel Engines???
» Another Cox .010 converted to R/C & P-51 Mustang. (Flight page 5)
» foam chuck glider, rc conversion
» For the Kids
» Cox Converted Diesel Engines???
» Another Cox .010 converted to R/C & P-51 Mustang. (Flight page 5)
Page 2 of 2
Permissions in this forum:
You cannot reply to topics in this forum