RunRyder RC
WATCH
 1 page 1458 views TOPIC CLOSED
HomeRC & PowerAircraftHelicopter
e-
Castle Electric Components
› Castle HV120 head speeds on an electric 700...
09-30-2012 08:50 PM  6 years agoPost 1
Blackhawk6

rrVeteran

Trenton, Mi

My Posts: All  Forum  Topic

Hey, what head speeds do you guys run on an electric 90 size machine. Is it still around 1800-2100? Of course this will depend on your flying style/motor/gearing/gov/esc...

I just got done with a 700 and I plugged her into the castle link to get the esc running. After initial set up I checked gov mode which allows me to chose a desired head speed for the different flight modes. In doing so, I put in Norm-1850, ST1-1950, and ST2-2050. The castle software told me (with my gearing) that my thro would be at 62.4%, 65.7%, and 68.3% to achieve those head speeds.

Is that ok or should I be more in the 75-85% thro for the system to run efficient (from what I've been told in the past)? Should I gear up/down on my pinion to achieve those #'s or is it fine to be running that low of a thro curve?

Note, I'm no crazy 3d pilot. I just do basic sport flying for now. I do however want this to run good/efficient and have decent flight times. I'm thinking it is ok to run like this and it'll be an advantage bc my motor isn't stressing too much. Right?

Well, as always, any help/comments would be greatly appreciated!

Thanks
Jason

PM  EMAIL  GALLERY  Attn:RR
10-01-2012 02:45 AM  6 years agoPost 2
2004lsc

rrApprentice

Phoenix, AZ

My Posts: All  Forum  Topic

What pinion do you run ?

I'm no castle expert anymore. But I thought the final flight mode had to be at 100% ??

I run 2200+ HS on my 700E

Mine is a converted N with the original 20t pinion. So I'm no help to you on pinion choice.

PM  EMAIL  GALLERY  Attn:RR
10-01-2012 02:50 AM  6 years agoPost 3
Blackhawk6

rrVeteran

Trenton, Mi

My Posts: All  Forum  Topic

Sorry, I guess I should have posted some specs...

Align 510kv motor with a 12t pinion and 112 main.

And I thought you're not supposed to run those ESC's over 85% to keep head room for the gov to work.

PM  EMAIL  GALLERY  Attn:RR
10-01-2012 03:41 AM  6 years agoPost 4
2004lsc

rrApprentice

Phoenix, AZ

My Posts: All  Forum  Topic

I spoke to castle/horizon. If I rememeber correctly the esc controls the gov mode even set at 100%. No need lower throttle curve for head room.

Look at their setup page. Doesnt it say 100% for 3rd flight mode ?

PM  EMAIL  GALLERY  Attn:RR
10-01-2012 03:42 AM  6 years agoPost 5
2004lsc

rrApprentice

Phoenix, AZ

My Posts: All  Forum  Topic

My curves are 65% 75% 85% but I run Jive. They are dif.

PM  EMAIL  GALLERY  Attn:RR
10-01-2012 06:58 AM  6 years agoPost 6
3Dmuse

rrApprentice

Ontario, Canada

My Posts: All  Forum  Topic

Below 70% throttle is too low for a Castle ESC. When using the governor on an Castle ESC, you want to be somewhere around 85-90% throttle for the desired head speed. When using partial throttles, you get higher current peaks through the system than when at full throttle. This is how PWM motor control works. I don't want to go into the technical explanation, but the lower the throttle, the higher the current peaks. You need a smaller motor pinion or a lower Kv motor, otherwise you'll risk over-stressing the ESC.

PM  EMAIL  Attn:RR
10-01-2012 03:12 PM  6 years agoPost 7
rocket_33

rrElite Veteran

Mount Pleasant, Michigan USA

My Posts: All  Forum  Topic

What head speed do you want to run? Once you know this, then you can select the best gearing and motor KV. Also realize that Castle does it calculations at 3.7 per cell....just about where you should be landing. I tend to do my setup based on 4.0 per cell because that is more the median.

If you do work it at 3.7 then the ESC will be working even harder to keep your low head speeds.

PM  EMAIL  GALLERY  Attn:RR
10-01-2012 03:34 PM  6 years agoPost 8
Blackhawk6

rrVeteran

Trenton, Mi

My Posts: All  Forum  Topic

I figured below 70% was too low... I would like to be around the 1950-2200 range for the different F.modes. If I crunch the #'s at 4v per cell that comes to 48v which is more than 4v added to the equation.

Result for calculation:
Estimated lowest voltage during flight: 40,92
Lowest RPM (due to voltage and efficiency) : 1900

(calculated for 100% throttle curve)
Hover RPM at beginning of flight: 2575
Hover RPM at middle of flight: 2372
Hover RPM at end of flight: 2289

Explain these results
Sooo, if I'm dropping my thro curve down to around 75%-85% that'll give me...

85% thro =2,188
80% thro =2,060
75% thro =1,931

Is this accurate using no gov and also based on full pack capacity? Or can I "not" figure it that way?

PM  EMAIL  GALLERY  Attn:RR
10-02-2012 04:18 PM  6 years agoPost 9
Reever45

rrNovice

Grand Junction, Co

My Posts: All  Forum  Topic

Hmm using the castle gov with 12s 510kv 12t/112 running setrpm mode should be 2070. Anything above that castle will give you a warning.

I ran 2050 on my 700,and was right at like 94%.

PM  EMAIL  GALLERY  Attn:RR
10-02-2012 05:17 PM  6 years agoPost 10
Blackhawk6

rrVeteran

Trenton, Mi

My Posts: All  Forum  Topic

I don't think I had it on "set rpm" mode...
I bought a tach and I'm just going to do it the right way and see what kind of numbers I'm spinning. That way it'll be accurate and I'm sure ill bring those thro curves up. I was thinking I must be calculating something wrong to have this much concern. As you said, it should be right around 85-95% thro to get 1950-2100 rpm. Ill hook it up and double check my settings in the esc and then when my tach arrives ill get it set.

Thank you all for the helpful comments.
Ill keep this post updated with my results

PM  EMAIL  GALLERY  Attn:RR
10-12-2012 06:28 PM  6 years agoPost 11
Blackhawk6

rrVeteran

Trenton, Mi

My Posts: All  Forum  Topic

Well everyone, I managed to get a tach and set the hs the right way. I ended up being right in the 80-90% range for me desired head speeds. It was right all along. Idk what I was so worried aboout...lol

Anywho, thank you all for the help. Time to get this thing in the air.

Thanks again!!
Jason

PM  EMAIL  GALLERY  Attn:RR
02-09-2013 03:46 PM  5 years agoPost 12
Stephen Born

rrElite Veteran

USA

My Posts: All  Forum  Topic

Jason,

An easier solution would be to use a Kontronik ESC and set your throttle curve at 60%. They are much more forgiving when it comes to low a %.

PM  EMAIL  Attn:RR
WATCH
 1 page 1458 views TOPIC CLOSED
HomeRC & PowerAircraftHelicopter
e-
Castle Electric Components
› Castle HV120 head speeds on an electric 700...
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Tuesday, October 23 - 1:43 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online