Jump to content
Sign in to follow this  
coppercity

New E-Prop install

Recommended Posts

I've been flying this E-Prop on one of our CTLS's for the last month. So far it is performing very well.  Takeoff and climb performance are improved due to the ability to achieve higher static and climb RPM (5400-5600) and cruise speeds remain the same as the prop doesn't overspeed during cruise.  It is well balanced, smooth and light.

 

20201229_163000.thumb.jpg.d9f65ce75c36cb041263c1a6f4dd240c.jpg

Share this post


Link to post
Share on other sites

I noticed a new 2020 CTLS video on YouTube a week or so back from a French dealer showcasing the brand new airplane, had this prop on it - was surprised.  I sure like the looks of the Sensenich props, but hard to dismiss the performance in these E-Props.  

Share this post


Link to post
Share on other sites
51 minutes ago, Tom Baker said:

Just curious, did you see any difference in engine temperatures?

Hi Tom,

I haven't noticed much change in temps, but it's our coldest month here in AZ and have thermostats on the engine.  May and June will be the true test for temps.

Share this post


Link to post
Share on other sites
1 hour ago, Jacques said:

👍  your engine is saying thanks

 

what pitch did you set it ?

I started at the factory setting of around 24 deg, that was a little flat, so ended up at around 26 deg for now.

Share this post


Link to post
Share on other sites
27 minutes ago, coppercity said:

I started at the factory setting of around 24 deg, that was a little flat, so ended up at around 26 deg for now.

Thanks ,, that's why I was asking,,as I always (installed a few) found the recommended pitch not enough.

Share this post


Link to post
Share on other sites

I've had my e-prop for a good while, the 1st on a CT in the US. My climb out temps are lower due to less load on the engine because of higher rpm. This was the best modification other than avionics that I've done.

Share this post


Link to post
Share on other sites
3 hours ago, coppercity said:

Another noteworthy item on this prop is it only weighs 4.4 lbs, a Neuform is 11.2 lbs and a Sensenich is 9.0 lbs.

 

How would it hold up flying though rain? Does it have a metal leading edge?

 

I have eyed the Sensenich due to this functionality. 

Share this post


Link to post
Share on other sites

I asked the e-prop manufacturer about rain and they said there is no issue. The leading edges have a replaceable protection strip.

Share this post


Link to post
Share on other sites

Cost?  Prop diameter?

Also, I'm a little unsure about the statement: "the ability to achieve higher static and climb RPM (5400-5600)".  It's really hard to get apples-to-apples comparisons on that, and a lot goes into it "prop pitch, aircraft deck angle in the climb, etc).  Not saying you are wrong, I'm just wondering how you tested to see the differences.

I will be in the market for a new prop in the next year or so, I would love to see head-to-head comparisons against the Sensenich.

Share this post


Link to post
Share on other sites
5 hours ago, GrassStripFlyBoy said:

Found the video:

Did you note the full fairings on the mains on that French CTLS?  Pretty slick.  And I like the extra buttons on the stick.  

This prop looks like a winner.  I stumbled on it at Sun n Fun 2018 on two different installations, and the Dealers swore by this prop.  Thank you for pointing out the weight variance Copper... that's a gallon of gas+...; )  Copper, any noise variance?  i.e. louder?   Quieter?  Thank you... 

Share this post


Link to post
Share on other sites

I have a documented flight test analysis of the e-prop which Flight Design USA used get approval for the prop use. It was done as unbiased as I could do with the test equipment I had available. You are welcome to it if it helps you. The blade design is like nothing I had ever seen before. 

Share this post


Link to post
Share on other sites
45 minutes ago, FlyingMonkey said:

, I would love to see head-to-head comparisons against the Sensenich.

don't know about the Sensenich, but I did compared it with a Whirlwind in 2018

RE-read the post   

 

 

 

Share this post


Link to post
Share on other sites
13 minutes ago, AGLyme said:

Did you note the full fairings on the mains on that French CTLS?  Pretty slick.

Lots of details such as the plates on the door opening frame too.  I'm planning a new stick tube and grip in my future projects.

Share this post


Link to post
Share on other sites
1 minute ago, Jacques said:

don't know about the Sensenich, but I did compared it with a Whirlwind in 2018

RE-read the post   

 

Thanks Jacques!

The E-props is very tempting, I just need more research to make an informed choice.  It looks like the cost with spinner is about $2200 USD, which puts it a couple hundred cheaper than the Sensenich.  I also like that the e-props in 65" diameter, while the Sensenich is 68".  That extra 1.5" ground clearance is nice for me with all the grass I land on.

I am curious how the E-props manages to get similar thrust to the other Rotax props with a much shorter blade chord.  They seem to be pitched about 24°, which my Neuform is around 23° IIRC.  Maybe the higher angle of attack on the prop makes up the difference, and I assume a short chord means less drag as well.  I'm sure the two airfoils have significant differences.

Share this post


Link to post
Share on other sites
2 minutes ago, GrassStripFlyBoy said:

Lots of details such as the plates on the door opening frame too.  I'm planning a new stick tube and grip in my future projects.

I need you to make me some new instrument panels first!  I have cash in hand!   :D

Share this post


Link to post
Share on other sites

I think E-props are similar to DUC props which supposed to have this "constant speed prop" effect ..

With my DUC propI get the following RPMs:

5450 on roll out ( on the ground)
5250 on climb out
5650 on WOT at 3000 

 

Share this post


Link to post
Share on other sites

I have to admit I'm skeptical of the "constant speed effect".  The engineering involved to make the prop blades twist exactly the way you want to seems voodoo-like, like something NASA could do, but not so sure about a small prop company.   I'm also not sure how that flex contributes to longevity or the lack thereof.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...