RunRyder RC
WATCH
 1 page 1002 views Post Reply
Home✈️Aircraft🚁Helicoptere-AlignOther › Heat sink experiment
07-22-2006 06:25 PM  14 years ago
Topic Vote0Post 1
KamikaziRcPilot

rrVeteran

Cincinnati, OH

MyPosts All Forum Topic
Heat sink experiment
I'm now running the Medusa 28-32-3400 motor that tends to run rather hot. I've been using a single Align heat sink which helps keep the temps reasonable.

I looked at the design of the Align heat sink, and noticed that it wouldn't take much of a modification to allow two of them to clip onto the motor. It took all of five minutes with the Dremel tool with a fiber cutoff wheel to come up with:

I've already captured motor temps with a data logger. I'll compare them to flights with the dual sinks and see how much it helps.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-22-2006 08:24 PM  14 years ago
Planehazza

rrVeteran

Newcastle, England

MyPosts All Forum Topic
Nice job!

Do ppl use thermal compound to make them more efficient?
As far as they know, I already had it!
T-Rex 450 XL HDE with metal upgrades
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-22-2006 08:25 PM  14 years ago
KamikaziRcPilot

rrVeteran

Cincinnati, OH

MyPosts All Forum Topic
Yup! I have a tube from Radio Shack...
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-22-2006 08:28 PM  14 years ago
Planehazza

rrVeteran

Newcastle, England

MyPosts All Forum Topic
Cool, I might have to try the stuff. after 8 mins, my motor gets quite hot (but bareable to the touch) and my Align 25A ESC gets very hot, like too hot to touch for more than a few seconds.

Prolyl getting a CC35 to replace my ALign 25A.
As far as they know, I already had it!
T-Rex 450 XL HDE with metal upgrades
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-22-2006 09:25 PM  14 years ago
KamikaziRcPilot

rrVeteran

Cincinnati, OH

MyPosts All Forum Topic
Here are graphs from the two flights I just finished. The motor temp is way down from what it was, but as mentioned, I not only added the second heat sink, but I switched from a 13T to an 11T pinion. Using the 11T, the head speed max'd out just over 2700, and that's the speed I'd like to maintain, so I have no overhead to draw from. As shown in the graphs, basic loops were dragging the head speed down quite a bit. I'm going to try and track down a 12T, as I think that will be the ideal pinion based on my setup.

This is fun, and educational!

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-22-2006 11:27 PM  14 years ago
Slowpoke

rrKey Veteran

Dublin, OH

MyPosts All Forum Topic
KamikaziRcPilot,

That's pretty cool, good thinking!

I'm sure the reduction in the pinion size had a lot to do with the temp also. Could you do a temp comparison with just the 1 or 2 heatsinks alone with the 11 tooth pinion?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-23-2006 12:25 AM  14 years ago
Raptor3DPilot

rrKey Veteran

North Las Vegas, NV

MyPosts All Forum Topic
Hey Kam what data logger are you using?? Eagletree??Remember when flying inverted that down is up and up is EXPENSIVE!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-23-2006 12:26 AM  14 years ago
Raptor3DPilot

rrKey Veteran

North Las Vegas, NV

MyPosts All Forum Topic
nevermind I just found your post on it!

thanks
Remember when flying inverted that down is up and up is EXPENSIVE!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-23-2006 01:31 AM  14 years ago
KamikaziRcPilot

rrVeteran

Cincinnati, OH

MyPosts All Forum Topic
Yes, it's the Micro Power from Eagle Tree. They've made some nice enhancements and corrected a few minor bugs recently. I'm getting some solid data now. I have a second temp sensor that I can plug in instead of the rpm sensor. I want to see how quickly the battery temp climbs. I plan to spend a large chunk of tomorrow at the airfield. I'll have my laptop with me so that I can offload data as I capture it.

I switched back to the 13T pinion and headed back to the field for two more flights. Here are the graphs from them:

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-23-2006 05:03 AM  14 years ago
clive45

rrVeteran

NSW Australia

MyPosts All Forum Topic
??
I have upgraded my heatsink on my align 25a ESC. The original rippled plate (heatsink HaHa) does not cover the FET's so I used a heatsink of an old video board and cut it to fit with the Dremel. Vety much better cooling.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-23-2006 11:19 AM  14 years ago
I3DM

rrProfessor

Israel

MyPosts All Forum Topic
KamikaziRcPilot, cool ida - thanks for sharing.

You could also use the (full round) Medusa heat sink if you like.
www.liorzahavi.com
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-23-2006 05:13 PM  14 years ago
KamikaziRcPilot

rrVeteran

Cincinnati, OH

MyPosts All Forum Topic
I looked at the full-round heat sinks, but they don't have near the fin area my dual Align setup has. The fins on mine actually stick slightly outside of the frame of both sides. I also trimmed my canopy back in the area to increase the airflow around them.

I'm hoping all of my work on this will translate into longer life for the motor!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-23-2006 06:52 PM  14 years ago
den307

rrNovice

Merced, CA

MyPosts All Forum Topic
Graphing motor heat
You can get better graph heat resolution if unclick rpm before do plot. If you have saved the flight data you can load the file and redue the graph without the rpm.
SHARE  PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 1002 views Post Reply
Home✈️Aircraft🚁Helicoptere-AlignOther › Heat sink experiment
Print TOPIC

 5  Topic Subscribe

Thursday, June 17 - 1:13 am - Copyright © 2000-2021 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online