Hot prop less efficient?

[Bryan1016]

My plane has TKS.  The hot prop rubber was left on after the addition.  Anyone ever see data on efficiency loss of hot prop?

Edited April 29, 2018 by Bryan1016

[Mark89114]

There is supposed to be a rubber boot that directs the fluid out from the hub to cover the blades.  I would assume this is known FIKI and non fiki airplanes.

[Bryan1016]

That makes more sense.  Thanks Mark. 

[carusoam]

So... that would make the hot prop more efficient.... no?

The TKS boot doesn’t go out very far... where the efficiency needs to be...

we could ask two experts... we have a prop guy... and we have a TKS guy...

You also might want to think about removing things that are no longer needed or wanted...  a pound or two off the front might be one of those things...

Ask @Cody Stallings...

Best regards,

-a-

[Awful_Charlie]

POH for a Bravo has a climb performance writedown for prop boots:

[Cody Stallings]

That’s a Feed Shoe. (Or FIKI Boot)

Its very important to keep that intact for the de-Ice fluid to travel down the veins to break up ice.

 

As far as performance loss, I can’t say Yes or No on the subject.

I can say that the performance of the Propeller in Icing conditions will be quite shaky without them.

In my honest Opinion, I would think the boots would consume a bit more power due to the parasitic drag on the blades Airfoil, but I have no data to back that up.

Also, if your Aircraft is suppose to have a “hot Prop” electric boots, then you have the wrong setup all together.

[carusoam]

Bryan,

can you see the TKS nozzles (tubes) that feed  the TKS fluid out onto the rubber channels...

Sound like you may have gotten one rubber part swapped out for a different rubber part on the prop...?

Best regards,

-a-

[L. Trotter]

For a TKS prop to be set up correctly, the TKS nozzles should extend out just past the spinner and cut back at an angle. Each nozzle should be pointed at the second grove (from the front) of the rubber boot. To assure proper function, you should get TKS fluid blown back on to the windshield with out turning on the windshield bar. Also, when you shut down you will see fluid on the front cowling behind the prop. Just helped the guys at CAV revise my prop setup that had been installed improperly.

[StevenL757]

9 hours ago, L. Trotter said:

For a TKS prop to be set up correctly, the TKS nozzles should extend out just past the spinner and cut back at an angle. Each nozzle should be pointed at the second grove (from the front) of the rubber boot. To assure proper function, you should get TKS fluid blown back on to the windshield with out turning on the windshield bar. Also, when you shut down you will see fluid on the front cowling behind the prop. Just helped the guys at CAV revise my prop setup that had been installed improperly.

Exactly right.

[FoxMike]

I heard Roy LoPresti say the deice shoes on a prop. would cause about a 3kt loss of speed due to loss of  prop efficiency.  He was speaking about the gains and losses of changes made to the 201.

[carusoam]

More follow-up....

Looking up the name on the prop’s rubber bits photographed above...

http://www.de-icers.co.uk/pages/application.htm

It looks like there maybe some remains of the first (electric) system left behind...

 

Unable to get better pics than this... the TKS website....

Best regards,

-a-

 

[Bryan1016]

Thanks for all the replies.  Plane has TKS set up, just some of the hot prop items remain.  I’ll wait until next time prop needs to come off to remove them.  

[Cody Stallings]

11 minutes ago, Bryan1016 said:

Thanks for all the replies.  Plane has TKS set up, just some of the hot prop items remain.  I’ll wait until next time prop needs to come off to remove them.  

Propeller is not in Compliance of the TC Data sheet if that’s the case.

Its either electric or FIKI.

Cant be a little of both

Edited May 1, 2018 by Cody Stallings
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