KST Servos - Compelling Performance and Price • How-to Evaluate and Chose

[@kstdigitaltechnology3295]

Great video! thanks John.

[@RCVideoReviews]

Thank you. Your servos fly all of my helicopters and they've never let me down.

[@Chuckitall72]

Simply put, this is some of the best r/c info I have seen, and I have been in the hobby since 1972. Thank you sir!

[@RCVideoReviews]

Wow, thanks!

[@steinne]

Excellent data driven decision tree. Thank you

[@woofie7520]

Another great video. Good information.

[@RCVideoReviews]

Thanks Woofie.

[@glenn4452]

Great video thanks for sharing the information sir.appreciated very much

[@RCVideoReviews]

You're welcome! Thanks for watching.

[@johanopperman8039]

Thanks John very interesting video. Thanks

[@RCVideoReviews]

Thanks for watching

[@hspeed3656]

Hey, Freddie, I was 16th to Like. Not a Heli guy but this was very interesting and will also be handy in planes. Cool stuff John.

[@Gavs_rc_hobbies]

Apart from my goblin fireball havok edition that came with servos and esc and motor, my other helicopters I chose KST servos and they've been flawless.

[@RCVideoReviews]

I bought them the first time based on recommendations from experienced heli pilots. After that I started doing the research and they are a very good value:performance equation. I have limited flights so far so I can't assess longevity yet. I'll get there with time.

[@atourdeforce]

This video is very true in most ways. But it has to be said when SAB call for a 8kg servo on the Kraken they specifically say 8kg per cm. This is important because it means that you dont need a minimum of 8kg torque, it means you need a servo with 8kg/cm. Meaning they already take into account that they will be asking you in the build to place ball socket at 17-18mm on the horn. So the actual force needed is much lower than 8kg torque you think you need. Thats a long winded way of saying when they ask for a servo of 8kg/cm they already know it will be around 4-5kg at the ball linkage. Theyre not saying it needs to be 8kg of torque at the ball linkage.

[@jamesderekeikeland9048]

I use the same servoes in my 700 RAW, great budget servoes, never had any issues, also have same experience with the BLS815, another good budget brand is GDW BLS892/895 - 992/995, their last serie i haven't tested

[@RCVideoReviews]

Freddie will be using GDWs in his Specter 700. I'm a fan of KST at this point.

[@XecutionStyle]

What's the impact of Torque on responsiveness? I imagine more torque wears the gears more too but is quieter than a quickly rotating tail servo?

[@RizHassan]

Have you come across a servo that has smooth movement? I have been looking for servo for pan and tilt camera, but most servos have jittery movement causing video distortion.

[@bentslattsveen2208]

What was the cyclic servo torque recommendation from SAB on the Kraken 580?

[@RCVideoReviews]

They didn't make one that I could find. They just say the Kraken flies well with mini servos.

[@robertjones1855]

What KST would you recommend for a Pilot 87” w/55cc engine?

[@RCVideoReviews]

The manufacturer recommends PW27AH servos for that plane which are 27KG servos for $100. The KST915v2 makes 25Kg @ 8.4v. They are within 2g of weight and the KSTs are 15% cheaper + they're available. I had a hard time finding a source for their PW27AH.

[@Edgecrusher28]

How many Kg's does a 700/800 class heli need on cyclic?

[@henryairconcepts2999]

usually 20kg is enough

[@johnnygritz2065]

Hi there, great video and great efficiency on way you provide info. When you mentioned speed, I hope no one gets confused and starts doing weird math like doubling the "speed" values read in servo manufacturer data, cause that "speed" is actually time.

[@RCVideoReviews]

Thanks for the info!

[@MWS-t9p]

Where's your spreadsheet? You link to it is a 404

[@RCVideoReviews]

Looks like my hosting provider lost all of my public downloads. I reposted. The link should work again.

[@MWS-t9p]

Thanks it worked. John, I have a question, on the 7 min mark you are explaining torque etc. In your example, you're using cm instead of mm so: 2 cm = 0.787402'' or 25/32" whereas 2mm = 0.07874" or 3/32" not that it matters much.. Just wondering.

[@RCVideoReviews]

I don't understand your question. At 7m it's just showing the effect of changing the distance. The example was in CM, but when it came time to figure the actual force values, I used 1.7cm/17mm per the Kraken ball location recommendation. So I don't know what you're driving at.

[@MWS-t9p]

Gotcha thanks for the explanation.

[@propsoff]

Haha! 9th.. But I hit the like button the most...👍🏻🍻👊🏻

[@SomeGuyInSandy]

I ran these calcs on my servos... :(

[@davidknutz3314]

First

[@ciobanurivelino3844]

Too bad is not programable. Maybe they think to this opportunity.

[@davidknutz3314]

First

[@FASTFREDDIE-R.C.]

First

[@davidknutz3314]

IDK Freddy, we kinda Tied I think. It was dang close for sure.

[@FASTFREDDIE-R.C.]

@@davidknutz3314 we need a ruling 🤔

[@RCVideoReviews]

Freddie won by a nose. It was close.

[@davidknutz3314]

No, when I tried to post, my phone just had the spinny thing. So I posted again. Then I saw your comment. It was close but I think you got me. I’ll get ya some day! 🤣👍