E-Flite Diamante 25e - WattFlyer RC Electric Flight Forums - Discuss radio control eflight

Pattern aircraft Discuss electric powered pattern aircraft in here

E-Flite Diamante 25e

Old 09-10-2007, 12:42 PM
  #1  
compflight
Member
Thread Starter
 
Join Date: Apr 2007
Posts: 192
Cool E-Flite Diamante 25e

Got my Diamante 25E today.
Going with the 4S Power 32
The manual states a 14 X 7 with the 3S2P but a 13 X 6.5E for the 4S2P
Can anyone confirm this is correct. I would have thought it should be the other way round. But who am I to Query E-flite
Looks a good choice of kit with the usual quality I have come to expect from E-flight. In fact, better than usual when I look at the wheels and the control horns. Very nice. I do not even have to replace them as with some kits (Not usualy E-Flite I might add)
Has anyone put a power meter on this thing with the 4S Power 32 setup as I am trying to guess at the flight times?
compflight is offline  
Old 09-20-2007, 01:20 AM
  #2  
tombo523
New Member
 
tombo523's Avatar
 
Join Date: Sep 2005
Posts: 3
Default I don't have the answer but...

How difficult would it be to put a motor that is not E-flite on the plane?
I have an Atlas that I think would work fine but I'm not sure the mounting holes are the same as the 25/32.
tombo523 is offline  
Old 09-23-2007, 03:41 PM
  #3  
compflight
Member
Thread Starter
 
Join Date: Apr 2007
Posts: 192
Default

I am sure there must be several alternatives not least being an AXI
compflight is offline  
Old 09-23-2007, 03:54 PM
  #4  
rcers
Super Contributor
 
rcers's Avatar
 
Join Date: Jul 2005
Location: Trophy Club TX
Posts: 6,314
Default

Pattern plane = pitch speed....

I would go with a much greater pitch prop for pattern. At least 10 pitch - so go with the prop that makes the power system happy - and you in that range.

Speed is good...

Mike
rcers is offline  
Old 09-29-2007, 04:50 PM
  #5  
compflight
Member
Thread Starter
 
Join Date: Apr 2007
Posts: 192
Default Pitch and now CG

The 13 X 6.5 is pulling about 56A afer the intial splurge of power.
All is ready for the maiden tomorrow if the weather is kind.
I found it strange that I had to have the 4250maH 4S evolite (which are pretty light too) as far back as I could get in order to get the CG at 5". To get it further back I would have to add lead. ooogh - dont like doing that!
do these things normally work out so nose heavy?
compflight is offline  
Old 09-30-2007, 09:36 AM
  #6  
compflight
Member
Thread Starter
 
Join Date: Apr 2007
Posts: 192
Default

Maidened this morning. Perfect calm.
Flew much better than anticitated. I am not sure that the CG could go back a tad from the 5" it is at present, but I cannot move the flight battery back any more. This is not the first E-flite kit that has worked out on the nose heavy side. Seems to be a trait.
Mods I am thinking about are changing the U/C to a carbon one from a company called Carbon Copy. They make some real butes.
Not sure about the raked back version. I might try the standard one since with my limited knowlege of mechanics the raked back type must be exerting a substantial leverage before any other forces are even applied. IE, if you were to push the plane down wen it is sittng stationary then there are forces causing the U/C to try to rip the bottom of the fuselage off. Is this what is happening with the the accounts of stories of the U/C causing the bottom of the fuz to be ripped out on anything exept a perfect landing. Changing this just may help. I will also change the wheels to lighter ones and forget those adorable spats in the interests of practicality rather than asethetism.
Fligth time I had was about 7minutes with about 15 to 20percent remaining.
Oh yes. The thing I loved on that maiden flight was when I tried a square loop. Just open up the power and it emulates a Saturn rocket.
Flat turns are intersting as I initialy over controlled with the aileron. I guess this is due to the rudder/aileron coupling negative effect, for want of a better explanation. However, kef was pretty good. Particuarly for me at least.
Oh well. I am a much relieved person having flown it, and a very much happier one.
compflight is offline  
Old 10-10-2007, 10:59 PM
  #7  
twest
New Member
 
Join Date: Mar 2007
Posts: 5
Default

Originally Posted by compflight View Post
G
The manual states a 14 X 7 with the 3S2P but a 13 X 6.5E for the 4S2P
Can anyone confirm this is correct. I would have thought it should be the other way round.
You always need to reduce prop size when increasing cell count in order to keep the amp draw the same (unless you increase the ratio of a gearbox).

THe larger prop on higher cell counts will probably draw too many amps.
twest is offline  
Old 10-10-2007, 11:25 PM
  #8  
compflight
Member
Thread Starter
 
Join Date: Apr 2007
Posts: 192
Default

OK, so I have on my diamante a 13 X 5.5e and I want to reduce the power but KEEP the same 4S lipo. do I go to a 12 X 8 or 12 X 6 and what sort of difference will it make to A/ the amp draw and B/ the flight performance?
I am begining to think that the 4320mAh lipo that E-flite say this aircraft needs is a mistake anyway. After about an 8 minute flight with the 13 X 5.5e prop I have never replaced more than about 2400mAh which makes me think a 33mAh battery would be fine.
compflight is offline  
Old 10-18-2007, 09:15 PM
  #9  
Dereck
Super Contributor
 
Join Date: Oct 2005
Posts: 1,071
Default

I've got the same motor as yourself in their Ugly Stik clone - I use a 10 x 7 APCE, drops the current into the mid 40s amps with decent enough performance - that's from a 3700mA 20C pack from Hobby Lobby. Was not all that keen on the mid 50s current draws, even though its technically within my pack's capabilities.

The nose heaviness - the Stik 25E is just the same as your Diamante. Even with the pack as far back as it can be inserted with the wing on, the model is still nose heavy and thus unpredictable in snaps/spins.

I recently took two ounces off the AUW by replacing the kit UC with a FG unit I picked up in a UK hobby shop while on vacation a few years ago. Haven't gotten to fly it yet, but two ounces less ahead of the CG - what's not to love about that ? Agree with you about the Diamante's swept back gear - nothing about it appeals to me for other than superb landings on ultra smooth tarmac

Being as I am embarrassed to take this thing out in public - the wife insisted on buying me a big shiny box for last Christmas, for those wondering why I have one in the first place - I intend to rip the covering off, ,apply a little individuality to its appearance and fix a few of its worse problems over this winter. One idea under consideration is fitting a 4S A123 pack to really nail the CG, and to allow fast charges without removing it. This will be made easier by a better fuselage radio fit.

Suspect if the Diamante had been sitting on the LHS shelf, I'd have gone for that instead - and been considering pretty much the same for this winter.

Regards

Dereck
Dereck is offline  
Old 11-27-2007, 09:05 PM
  #10  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

i knock the gear off my diamante 1 out of 3 landings beefed up the mounting plate w/ 1/4 in ply and land a lot faster
Alpea42 is offline  
Old 11-27-2007, 09:11 PM
  #11  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

with an E Flight power 25 and a 2100 ma 3s Thunder power batt. I had to put the batt. in the cowl to get C.G. right.And yes that still is enough thrust for verticle climb
Alpea42 is offline  
Old 11-28-2007, 01:35 AM
  #12  
compflight
Member
Thread Starter
 
Join Date: Apr 2007
Posts: 192
Default

Have finally ended up with a 12 X 6 prop which gives well over 10mins flight time. I now feel pretty certain that a 4S 3300mAH would be more than enough. Where do e-flite get these figures from or do they just want to sell batteries, not that they would make any thing from that - or would they!
compflight is offline  
Old 11-28-2007, 06:33 AM
  #13  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

I know what u meen I get 10 min flights with 2100 ma 3s and thats not being throttle conservative.A 4000 ma 4s like they recomend would be heavy and over doing it i'm sure
Alpea42 is offline  
Old 12-27-2007, 05:11 AM
  #14  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

For xmas I got a 60 Amp Pro Brushless ESC .Took her out and flew with the 45 Amp esc one last flight this afternoon .Yeah esc was warm on landing .Came home installed the 60 A one and tomorrow I'm finally not gonna be scared the esc wil over heat and shut down . A 4 cell lipo is next on my list. Diamantes' fly like real planes.
Alpea42 is offline  
Old 12-27-2007, 05:13 AM
  #15  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

I forgot the picture today was flight # 17
Attached Thumbnails Click image for larger version

Name:	My planes #2.jpg
Views:	775
Size:	167.5 KB
ID:	50400  
Alpea42 is offline  
Old 01-02-2008, 12:56 AM
  #16  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

Nobody posted in a while huh.Well I've decided on my next scratch built build .I'm gonna copy the demensions of my Diamante on blue Dow FFF .I figure I'll use some of the build tips I've learned here plus some I've learned myself and reproduce my favorite plane.My original now has 19 flights and I'm finnally over the new plane jitters with it.And it flies so well I want to have a repacement for it.I'm gonna laminate 2 sheets of 1/4 " material with drywall tape and white glue for a stronger than single thickness strength.The 1st option I have to face is whether to leave the wing as a flat foamy or build it with an airfoil.Since I want an accurate reproduction I'm thinking the airfoil shape.I'll take pics as I go
Alpea42 is offline  
Old 01-02-2008, 01:11 AM
  #17  
Airhead
Redneck Member
 
Airhead's Avatar
 
Join Date: Dec 2006
Location: Huntsville AL.
Posts: 5,624
Default

Originally Posted by Alpea42 View Post
I forgot the picture today was flight # 17
Sweet Plane...
Airhead is offline  
Old 01-02-2008, 04:08 AM
  #18  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

Thanks airhead it is a head turner
Alpea42 is offline  
Old 01-02-2008, 10:19 AM
  #19  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

Got the wing and tail feathers cut out .I used the curved edge between 2 sheets for my leading edge of the hollow wing.And likewise for the verticle stab.I taped the center of the elevator and ver. stab rudder assembly with nylon drywall tape ,painted white glue on it and have them clamped over night.I hope I can keep the auw to under 40 oz.And if I can I might try flying it on a 480 brushless out runner.The real deal weighs 54 oz. with the E Flight 25 and a 2100 ma 3 s batt.The wing with servos weighs 13 oz. and I don't think I can make the foam one much lighter.We'll see
Alpea42 is offline  
Old 01-02-2008, 11:20 PM
  #20  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

The double thickness laminated FFF is amazingly ridgid .Probably heavier than balsa framed tho
Alpea42 is offline  
Old 01-03-2008, 03:35 PM
  #21  
garlonbs
New Member
 
Join Date: Oct 2005
Posts: 9
Default

Just about to finish mine. Using an Axi 2820 with a 12x6 prop just because I had it. I will be using 3s2p 2200s for power with the new castle regulator bec. I suspect this power setup will be "stupid power" but it should be fun
garlonbs is offline  
Old 01-03-2008, 03:47 PM
  #22  
compflight
Member
Thread Starter
 
Join Date: Apr 2007
Posts: 192
Default

I used a 12 X 6 with 4S now that did give awesome power. But nice to fly straight and level at half power as it gives me better roll precision but this is no pattern plane. Its a super sports plane but rolls are too barrely
compflight is offline  
Old 01-03-2008, 11:06 PM
  #23  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

maybe cuz mine is lighter w/ a 2100ma 3s and the 25 motor auw is 54 oz but it rolls on a tight axis
Alpea42 is offline  
Old 01-03-2008, 11:11 PM
  #24  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

one 2100 ma batt. only gives a 8 min flight tho.Oh well more practice landing.Since I reinforced the L G mounting ply I haven't knocked the gear off
Alpea42 is offline  
Old 01-04-2008, 08:06 PM
  #25  
Alpea42
Parkjets Rule 3D Rocks
 
Alpea42's Avatar
 
Join Date: Nov 2007
Location: So. Ca. Chino
Posts: 3,646
Default

I gotta tell ya guys this plane is worth every penny of the 150$ retail price.The engineering and design work that Peter Goldsmith put in the fuselage alone is mind boggeling.Trying to make a home shop replica is way beyond my modeling abilities.So simplify dummy.I've simplified all the ply formers and partial bulkheads of the forward fuse to a 3 sided tube box out of 1/8 th ply,drilled 1" lightening holes in all 3 sides and glued it to my fuse sides so it sticks out the nose with my motor mount firewall on the front.The profile looks good so far ,but I can allready tell weight is gonna be a problem .My hats off to E Flight and Goldsmith on this plane.Mike Parsons does a review of it on the other Diamante thread.
Alpea42 is offline  

Quick Reply: E-Flite Diamante 25e


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.14540 seconds with 12 queries