Espritmodel.com Telemetry Radio
Reply
Thread Tools
Old Jan 05, 2012, 12:48 PM
Southern Pride
everydayflyer's Avatar
Haralson County GA. USA
Joined Oct 2004
34,632 Posts
Quote:
Originally Posted by turboparker View Post
Charles,

From what I've seen, these motors are relatively consistent. I've owned five V1 Beasts. Static RPM numbers are essentially identical on all five (Within 50 RPM). I own two Sbachs. Static RPM numbers are also essentially identical. I doubt that there is any statistically-significant variability between motor samples. Most likely, there are a few outliers - but that's about it.

Joel
Great to hear they are that consistent.

My V1 stock prop and battery (E flite 120) 10,300 RPMs
changing to a Hyperion 120 , 10,500 RPMs.

Both after RPMs had settled to a steady (holding ) point.

Charles
everydayflyer is offline Find More Posts by everydayflyer
Last edited by everydayflyer; Jan 05, 2012 at 04:32 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 05, 2012, 04:29 PM
Registered User
freesex's Avatar
Joined Aug 2011
88 Posts
Quote:
Originally Posted by hidaven View Post
how does the beast with the old v1 motor and 5043 prop compare to the new motor say on the 5030? I could care less about motor noise, its the performance that matters most to me : )
I flew both setups on my B3D, My personal experience is that V1 motor + 5043 vs 15%-20% faster and 10%-15% more torque than V2 motor + 5030.
freesex is offline Find More Posts by freesex
Reply With Quote
Old Jan 05, 2012, 05:08 PM
Now Where Did That Plane Go?
Crash One's Avatar
Columbus, GA. Area
Joined Sep 2007
426 Posts
So, does anyone have a "gently used" V1 motor and 5043 prop that they would care to sell me? I only have one LHS and they aren't easy to deal with. P.M. me.
Crash One is offline Find More Posts by Crash One
Reply With Quote
Old Jan 05, 2012, 05:34 PM
Diverted by planks
tracknoob's Avatar
South Florida
Joined Dec 2010
5,009 Posts
Just got back from putting 5 210 mah batteries (6 min flights) through my 3D Beast with V1 motor in 10-15 MPH winds! I love it! I think I am finally getting the hang of it. And now is a good chance to try out my new multi-battery charge adapter for the Venom charger, too! Finally I will be able to tell the amount of mah I am putting back into these little Beast batts.
tracknoob is offline Find More Posts by tracknoob
Reply With Quote
Old Jan 05, 2012, 08:33 PM
Gopher huntin' stick jockey
turboparker's Avatar
East Bethel, MN USA
Joined Jul 2009
11,622 Posts
Quote:
Originally Posted by everydayflyer View Post
Great to hear they are that consistent.

My V1 stock prop and battery (E flite 120) 10,300 RPMs
changing to a Hyperion 120 , 10,500 RPMs.

Both after RPMs had settled to a steady (holding ) point.

Charles
You may be interested in my V1 Beast static RPM testing. I included RemE's testing on the stock pack for a third sample. With yours, we now have four. RemE got 10224 RPM on the stock pack, I got 10200, and you got 10300. Differences in density-altitude & batteries are likely the primary variables, here. Note the difference in RPM between the Hyp 120 & 180 packs - 10500 with the 120s as compared to 11,100 & 11,150 with the Hyp 180s. That works out to be a 13% increase in thrust.

Weight & static RPM comparisons (RPM measured with a calibrated optical tach under natural light @ 30 sec into the run on a freshly-charged pack):

V1 UMX Beast #1
Stock prop
70 F
910' AMSL

Eflite 2s 120 ----------------------------------------------- 9.45g; Static RPM: 10200
Eflite 2s 180 ---------------------------------------------- 12.92g; Static RPM: 10500
Hyp 2s 180 ----------------------------------------------- 11.84g; Static RPM: 11100
Hyp 180 'UM' cells x2 + RC-Connectors series harness -- 12.34g; Static RPM: 11000
Hyp 180 'UM' cells x2 + Eflite series harness ---------------- 13.01g; Static RPM: 10700
Hyp 2s 240 ----------------------------------------------- 14.51g; Static RPM: 11100


V1 UMX Beast #2
910' AMSL, 70 F, 30 sec into the run on a freshly-charged pack. The GWSProps spreadsheet was used to calculate thrust:

GWS 5043:
Hyp 180 2s: 9600 RPM; Thrust=127g; Pitch-speed: 39.0 MPH**
Hyp 240 2s: 9700 RPM; Thrust=129g; Pitch-speed: 39.5 MPH**

GWS 5030:
Hyp 180 2s: 11300 RPM; Thrust=124g
Hyp 240 2s: 11300 RPM; Thrust=124g; Pitch-speed: 32.1 MPH**

Stock prop:
Hyp 180 2s: 11150 RPM; Thrust=111g*
Hyp 240 2s: 11150 RPM; Thrust=111g*; Pitch-speed: 29.0 MPH**

RemE's V1 UMX Beast testing with the stock 120 mAh pack:

5043: 8574 RPM; 2.75A; Thrust=100g; 34.9 MPH**
5030: 10130 RPM; 2.25A; Thrust=99g; 28.8 MPH**
stock: 10224 RPM; 2.25A; Thrust=92g*; 26.6 MPH**

*May not be accurate, as the stock prop's t-constant may or may not be similar to the GWS prop.

**Calculated pitch-speed. Prop slippage and in-flight unloading not taken into account.


Joel
turboparker is online now Find More Posts by turboparker
RCG Plus Member
Last edited by turboparker; Jan 05, 2012 at 08:53 PM.
Reply With Quote
Old Jan 05, 2012, 08:43 PM
LiPo-Sucker & Airframe EMT
pugsam's Avatar
Charlottesville, Virginia, USA
Joined Aug 2010
3,517 Posts
So, everything else being equal, is it reasonable to say that in general the 2s 180 / 5043 duo is the sweetest combination?

(I tried to word that carefully....)

pugsam is offline Find More Posts by pugsam
Reply With Quote
Old Jan 05, 2012, 09:16 PM
Registered User
United States, CA, Sebastopol
Joined Dec 2010
7,135 Posts
Quote:
Originally Posted by pugsam View Post
So, everything else being equal, is it reasonable to say that in general the 2s 180 / 5043 duo is the sweetest combination?

(I tried to word that carefully....)

That sure is what I've come to like. Just got back from flying it today, along with the Bixler (boring camera platform) and Slick 51 (hot dog!). The beast was definitely more like the Slick! Not as much vertical, but no slouch either. As I've said before, rolling vertical 'till you have to stop because you can't see it anymore.
erkq is online now Find More Posts by erkq
Reply With Quote
Old Jan 06, 2012, 08:47 AM
Registered User
United States, TX, Austin
Joined Nov 2011
17 Posts
I've not had good luck with the beast 3d. It's a little to fast for me to handle. I thought it would be a good stepping stone. I fly my 4-site and extra 300 no problem, but have had some nasty crashes with the beast. I ordered some spare wing sets witch I hope will give me more confidence. I'm used to flying indoors, so looking up and learning to handle wind is new to me.

Would adding flaperons be advantageous for me? If so, will the AS3X still work if I divide the aileron channel for flaps?
justemailme is offline Find More Posts by justemailme
Reply With Quote
Old Jan 06, 2012, 08:53 AM
Gone Huckin'
turnerm's Avatar
Charlotte, NC
Joined Jan 2011
9,259 Posts
Quote:
Originally Posted by justemailme View Post
I've not had good luck with the beast 3d. It's a little to fast for me to handle. I thought it would be a good stepping stone. I fly my 4-site and extra 300 no problem, but have had some nasty crashes with the beast. I ordered some spare wing sets witch I hope will give me more confidence. I'm used to flying indoors, so looking up and learning to handle wind is new to me.

Would adding flaperons be advantageous for me? If so, will the AS3X still work if I divide the aileron channel for flaps?
The Beast would be quite a step up in terms of speed from both of the planes you mentioned BUT... it will fly very slowly if you can force yourself to do it. You'll have to steer with rudder a good bit but this plane can easily fly at a jogging pace.

I wouldn't recommend setting up flaperons. In my limited experience with them it just made the Beast a bit more squirely and more prone to tip stalls. The gyro may improve on these factors but in general I think your best bet is to try and learn to fly it without flaperons.
turnerm is offline Find More Posts by turnerm
Reply With Quote
Old Jan 06, 2012, 09:01 AM
Registered User
Joined Jan 2008
118 Posts
Is the eflite umx extra 300 a good plane for learning 3d. I can't really hover the beast 3d to well and would like to plane to learn 3d.
rapala is offline Find More Posts by rapala
Reply With Quote
Old Jan 06, 2012, 09:02 AM
Gone Huckin'
turnerm's Avatar
Charlotte, NC
Joined Jan 2011
9,259 Posts
Quote:
Originally Posted by rapala View Post
Is the eflite umx extra 300 a good plane for learning 3d. I can't really hover the beast 3d to well and would like to plane to learn 3d.
From what I've read/heard it's a fantastic plane for that purpose but it can't handle wind at all. It's really an indoor flyer.

I think you're best bet is to get an EPP Foamie. I've got a 34" Edge from 3DHS that's a TON of fun and a great 3D practicing plane.
turnerm is offline Find More Posts by turnerm
Reply With Quote
Old Jan 06, 2012, 09:23 AM
LiPo-Sucker & Airframe EMT
pugsam's Avatar
Charlottesville, Virginia, USA
Joined Aug 2010
3,517 Posts
New GeeBee video:

http://www.rcgroups.com/forums/showp...&postcount=360
pugsam is offline Find More Posts by pugsam
Reply With Quote
Old Jan 06, 2012, 05:27 PM
Parkzone junkie
kalmon's Avatar
United States, MI, Grand Traverse
Joined Oct 2008
3,535 Posts
I saw mention earlier that someone was going to try a GWS 6030. Has anyone tried that yet on the stock 2500kv motor? If not I have a brand new 5043 and a motor-less sbach fuselage that I could put the beast's 2500 into and order a v1 motor to replace it.

The new Beast3d flies really poorly on the stock setup, I need to change something. I guess I'm spoiled by my sbach. I honestly thing my UM t-28 is faster on a calm day. Which brings me to another topic. I've been looking at all the rpm numbers on different props. The KV to RPM is not adding up, not even coming close in fact. 2500kv * 7.4 pack voltage = 18500, now obviously that's no prop on there but seeing 10-11K rpm readings? That's about a 45% loss.

-Brian
kalmon is offline Find More Posts by kalmon
Reply With Quote
Old Jan 06, 2012, 05:39 PM
ISP Supervisor
makg's Avatar
United States, AK, Fairbanks
Joined Jan 2006
722 Posts
I agree with you Brian, I believe my UM t-28 is faster, but the Beast seems more capable of slow flight. I went the Champ->T-28->3D Beast route and I do not think the change in difficulty was much.
makg is offline Find More Posts by makg
Reply With Quote
Old Jan 06, 2012, 05:56 PM
Gopher huntin' stick jockey
turboparker's Avatar
East Bethel, MN USA
Joined Jul 2009
11,622 Posts
Quote:
Originally Posted by kalmon View Post
..... The KV to RPM is not adding up, not even coming close in fact. 2500kv * 7.4 pack voltage = 18500, now obviously that's no prop on there but seeing 10-11K rpm readings? That's about a 45% loss.

-Brian
Brian,

Kv is an unloaded measurement. Loaded RPM at a given voltage will always be significantly less than unloaded RPM. At a given voltage, loaded RPM depends entirely on the load.

Joel
turboparker is online now Find More Posts by turboparker
RCG Plus Member
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Official Eflite UMX Beast Owners thread! darksiede Micro Ready-to-Fly 18354 Aug 19, 2014 06:23 PM
Sold Eflite UMX Beast w/3batt and charger $120 shipped RobDog Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 2 Feb 06, 2011 09:40 PM
Wanted eflite UMX Beast fnlrun Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 11 Dec 12, 2010 04:23 AM
Sold eflite UMX BEAST TERMAGATOR Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 8 Dec 04, 2010 01:16 AM