RE: Long-EZ 46 Conversion to Electric  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> ARF or RTF >> NitroModels Support >> RE: Long-EZ 46 Conversion to Electric
Page: <<   < prev  1 [2] 3   next >   >>  

Login
Message << Older Topic   Newer Topic >>
RE: Long-EZ 46 Conversion to Electric - 10/28/2006 7:57:55 PM   
re2smpc


 

Posts: 43
Joined: 11/4/2005
From: Downingtown, PA, USA
Status: offline 		Of course! Why didn't I think of that. Thanks!

(in reply to bobzilla)
       Post #: 26

RE: Long-EZ 46 Conversion to Electric - 11/2/2006 3:16:06 AM   
re2smpc


 

Posts: 43
Joined: 11/4/2005
From: Downingtown, PA, USA
Status: offline 		Here are the latest pictures of the RichModel Long-EZ 46, glow to electric conversion. I added a brace for the Jeti 70Amp speed controller. I have also included a CAD drawing of the duct unit I will install under the speed controller. I plan to make an opening in the "belly" of the plane to accept the cooling "scoop".

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize

(in reply to re2smpc)
       Post #: 27

RE: Long-EZ 46 Conversion to Electric - 11/2/2006 3:26:32 AM   
bobzilla



Posts: 842
Joined: 8/4/2004
From: Henderson, NV, USA
Status: offline 		The only warning I have is that "captured" air will put significant more air pressure inside the cabin...and a weak
attached hatch/canopy will usually eject with force. I have had it happened on my 2 30% yaks..as the opening in the
YAK 54 is huge hole and the air getting to the inside of the fuselage just is too much for the hatch. One hatch blew off, hit the elevator which naturally, downed the yak..Aerobatic Models sold me a replacement plane at cost. (sweet)

so..now, I have little air vents along side of hatch and in back..that lets that air move on thru and out..thus lowering the pressure..
something you will have to CAD up also..(nice)..

bobz

p.s. I thinking..what about an semi enclosed area that the air enters, flows over the esc..then out the same type of
duct you have designed only backwards?


(in reply to re2smpc)
       Post #: 28

RE: Long-EZ 46 Conversion to Electric - 11/2/2006 4:09:04 AM   
re2smpc


 

Posts: 43
Joined: 11/4/2005
From: Downingtown, PA, USA
Status: offline 		Hi bobz. Thanks for your comments and concern. I thought about the air flow. I did a calculation on the area of the intake. I plan to drill holes in the rear "firewall" that will make the intake to exhaust flow of air 2:1. I expect that since the area for intake air will be 1/2 half the space that allows the air to escape (through the back over the electric motor) the captured aire issue wil not be an issue. What do you think?

(in reply to bobzilla)
       Post #: 29

RE: Long-EZ 46 Conversion to Electric - 11/2/2006 4:33:34 AM   
bobzilla



Posts: 842
Joined: 8/4/2004
From: Henderson, NV, USA
Status: offline 		yep..your on the right track...my friend just burned his esc up and it actually caught fire (hobby-lobby 300) enough to melt some the surrounding monokote. Over powering the esc with a much bigger motor, wrong prop or incorrect battery leads quickly to disaster sometimes. I have run my 46bl with 12x8e prop 4400lipo and my esc just get barely warm..so I think I will be ok.

bobz

(in reply to re2smpc)
       Post #: 30

RE: Long-EZ 46 Conversion to Electric - 11/2/2006 5:38:40 AM   
Rube Goldberg


 

Posts: 196
Joined: 6/5/2006
From: Whale Tail, RI, USA
Status: online 		Just a thought....a simple and very effective "air scoop" could be easily made from the plastic packaging of nearly any of the popular brands of spinners. The one package would yield a pair of "scoops", one for the intake and one for the exhaust---though I do agree on the exhaust area being at least twice the intake area. Drilling to "vent" the firewall sounds like a good idea. Sounds like you guys are real close to having an electric version in the air!

(in reply to bobzilla)
       Post #: 31

RE: Long-EZ 46 Conversion to Electric - 11/2/2006 6:11:21 AM   
bobzilla



Posts: 842
Joined: 8/4/2004
From: Henderson, NV, USA
Status: offline 		Yep, but I think Steve is putting more engineering into it than the original designers. This would be the most awesome plane if it could have retracts, rudders, and a nice canopy attachment..they just did not go full tilt with this model.

bobz

I maiden my patty wagstaff tomorrow..with new g-62. I hope I don't blow the wings off!


(in reply to Rube Goldberg)
       Post #: 32

RE: Long-EZ 46 Conversion to Electric - 11/10/2006 1:29:41 AM   
re2smpc


 

Posts: 43
Joined: 11/4/2005
From: Downingtown, PA, USA
Status: offline 		Thanks bobz for the compliment. You are right, being an engineer, I can never build a plane and keep it "stock". I always have to add my own touches to it. This Long-EZ glow to conversion is turning out to be my best yet. I've made some progress on the project and wanted to post some new images. You can see the finished air duct in place (outside and inside views) and the firewall with 4 additional 1" diameter holes to allow the air to escape from the cabin. Blind nuts are also installed to except the brushless motor mount. The other images show the finished main wing. I cut checkerboard Ultracote to match the existing trim lines and placed on the underside of the wing to help with orientation. I must admit, I am very pleased with the results so far. I am going to pass on adding the rudder control and front retract for now. (I may decide to add at a later time.) My next part of the project is to work on that slick canopy attachment method. I'll take some of Rube's suggestions and add my own ideas.

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize

(in reply to bobzilla)
       Post #: 33

RE: Long-EZ 46 Conversion to Electric - 11/10/2006 2:35:19 AM   
bobzilla



Posts: 842
Joined: 8/4/2004
From: Henderson, NV, USA
Status: offline 		very nice! i like to ultra cote added. I been so busy with my 43%, I can't find time to work on my EZ..sorry
I show you what I mean....



Attachments
Click to see fullsize image.
Click for fullsize

(in reply to re2smpc)
       Post #: 34

RE: Long-EZ 46 Conversion to Electric - 11/10/2006 4:01:47 AM   
re2smpc


 

Posts: 43
Joined: 11/4/2005
From: Downingtown, PA, USA
Status: offline 		Looks like you have a job on your hands too! Isn't it amazing that no matter how many planes you have, you always want to build more. Ain't that the truth!

(in reply to bobzilla)
       Post #: 35

RE: Long-EZ 46 Conversion to Electric - 11/10/2006 4:22:17 AM   
re2smpc


 

Posts: 43
Joined: 11/4/2005
From: Downingtown, PA, USA
Status: offline 		Anyone reading this thread know where I can purchase a red, 2 1/2" plastic spinner for electric push-prop applications? (I have a standard electric prop and will run the brushless motor in reverse direction.) I have a spinner for conventional setup (that I thought I could use) but just realized today that I will have to make some modifications to it to make it work with the prop installed in reverse.

(in reply to re2smpc)
       Post #: 36

RE: Long-EZ 46 Conversion to Electric - 11/10/2006 5:36:45 AM   
bobzilla



Posts: 842
Joined: 8/4/2004
From: Henderson, NV, USA
Status: offline 		http://www.maxxprod.com/mpi/mpi-11.html

try here

(in reply to re2smpc)
       Post #: 37

RE: Long-EZ 46 Conversion to Electric - 11/11/2006 1:04:09 AM   
re2smpc


 

Posts: 43
Joined: 11/4/2005
From: Downingtown, PA, USA
Status: offline 		bobz, I checked the site you recommended. They don't offer and plastic spinners (only aluminum). I don't think there is enough demand for this type of product for any manufacturers to offer them. I will look at the standard one I have and see how I can modify the prop openings to make it work with the prop mounted in revers orientation.

I now have another question: What method did you use to mount the canard in the fusalage? I made the openings last night and pushed the canard through into position. I don't see any other way than to remove some of the covering on the wing that is inside the cabin and apply epoxy to the internal intersection points. I also thought of just using hot glue to keep it in place (mine has a nice snug fit) in case of a bad landing so it breaks free and doen't cause too much damage.

(in reply to bobzilla)
       Post #: 38

RE: Long-EZ 46 Conversion to Electric - 11/11/2006 3:29:36 AM   
bobzilla



Posts: 842
Joined: 8/4/2004
From: Henderson, NV, USA
Status: offline 		yes, i hated to insert carnard like that..I still think i will break the epoxy..and make it attached differently..like a wing sadle with some bolts.
I need to redo the clevis..to that metal horn as it is so much slop..
a really bad design on the canard this plane.

bobz

(in reply to re2smpc)
       Post #: 39

RE: Long-EZ 46 Conversion to Electric - 11/18/2006 2:46:41 AM   
re2smpc