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  #1  
Old 02-24-2021, 10:41 AM
Frogman208 Frogman208 is offline
 
Join Date: Nov 2014
Location: San Diego,ca
Posts: 51
Default PIREP on Whirlwind "new" 330 series C/S propeller series

Hey Guys,

Wanted to get an 'initial' PIREP out for the 'new' Whirlwind 330 series C/S propeller that I've been testing. For background, I've had a Hartzell BA 7495S 2-blade (pre-7497 and post 7666 blade) and MT MTV-12b 3-blade propellers all within the last year and testing in San Diego. My first Condition Inspection will be in May and I'll have over 200hrs on the RV-7, so I do fly a lot. My constant issue has been finding the perfect propeller/engine combination that would allow me to use the full capability of the 200hp, angle valve IO-360 A1A non-counterweight crack without RPM restrictions. The non-counterweight cranks are notorious for harmonic vibrations that eventually become evident with grease leaking thru propeller hubs even if your adhering to RPM restrictions. I only mention Hartzell and MT (both good propellers) because I've had both on my RV prior to the 330 series. I'm still collecting data via Savvy Analysis (I download every flight currently around 550 flights) and comparing flight runs in the vertical and top speeds. Initial impressions of the Whirlwind 330 series is exactly what I've been looking for. I've increased climb (even above 3-bladed MT) and 'surprising' to me, I've regained the 5-7knot top end speed I lost going from a 2-blade to a 3-blade. My top end is making Vans marketed top speeds with a 3-blade propeller I've ran multiple GPS runs and its consistent so I'm really impressed and confused since 3 blade is suppose to be slower. I've done full-power climbs from Borrego, CA (sea-level) up to 9,500 MSL on auto-pilot with an average climb of 2000+ fpm till level off. The 330 series is stunningly smooth across the power range. My new favorite is full throttle and 2100 RPM cruise (over-square) at mid-range altitude I can pull 165kt TAS sipping gas and cant even hear the engine. I'm running LOP, ROP and max allowable over-square operations and truly amazed. I've had the 330 series dyno balanced at 2400 RPM but its extremely smooth across all RPM's.
For those with non-counterweight cranks (Lycoming's, Titans, etc), please give Hunter a call at Whirlwind before you decide on a propeller. What makes the 330 series able to withstand the non-counterweight harmonics is the beefed up Hub design. If you want to compare capability and price, you need to compare the Whirlwind 330 series with the Hartzell composite propeller and MT MTV-9 against the Whirlwind 330 series.
Finally, I wanted to mention the 330 series can be configured for either 2-blade or 3-blade configuration. In simple terms, the 330 series is basically a beefed up 300 series Hub and 72HRT blades (best of both worlds). I'll post more data results as I fly since San Diego weather is pretty stable year round, air temps allow for comparative testing year round.
**For those with keen eyes, I'm not making 80% at 10K DA, I'm still adjusting the Dynon power setting for my engine. I'm actually making approx. 75-76% at 10K. Kevin or Dan will definitely catch that. Also, the spinner has not been painted yet so it is just primer paint.
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Last edited by Frogman208 : 02-24-2021 at 01:03 PM. Reason: Took off prices since it’s speculative
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  #2  
Old 02-24-2021, 02:25 PM
smithflys23 smithflys23 is online now
 
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I have the 2 blade 74HRT, and I love it!
Good to hear the 3 blade is equally as impressive.
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  #3  
Old 02-24-2021, 03:33 PM
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Ironflight Ironflight is offline
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Default

I’ve recently been testing a variety of props as well, and absolutely love the -300 WW!

In answer to your amazement that you aren’t losing speed when going from two blades to three as we traditionally expect, I chalk it up to the fact that blade aerodynamics have improved considerably since the older Hartzell blades were first laid out - state of the art has advanced. So you get the best of both worlds with the modern blades on a three-blade hub - no loss of speed, and better climb....what’s not to like?!

Paul
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  #4  
Old 02-24-2021, 04:03 PM
Frogman208 Frogman208 is offline
 
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Thanks Matt and Paul,

I'll be the first to acknowledge I'm an absolute amateur in both build and flying experimental and aircraft in general but I'm a big believer in knowing your equipment inside and out. In my field of the military if you didn't know your diving, jumping or shooting gear inside and out (and limitations) it could cost you your life. I've probably over done my research and testing with the various propellers and they all have their own benefits but I choose Whirlwind because I believe in technology and advancements in efficiencies (just like Paul said). Not to say other manufacturers are not doing the same but Whirlwind has a passion for it. They listen to the customer base and adapt. The 300 series is a great propeller for 80% of the RV engines. The new 330 series covers the last 20% for those with non-counterweights, electric ignitions and pumped up HP's. Its not Whirlwinds (330 series) or MT (MTV-12) issue if you use those propellers for your 200+hp, EI engine and start pushing grease out your hub as they are not designed for your engine, the 330 series is.
Couple points I forgot to mention is the 330 series can be 2 or 3 blade configured AND counter-weighted for those aerobatic inclined individuals. How I understand it from Whirlwind is the 300 and 330 series will be individually (modular) configurable to your specific needs but please ask first as I'm not affiliated with Whirlwind. I just really like the propeller and asking a lot of questions about their operations and business model.
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Last edited by Frogman208 : 02-24-2021 at 04:05 PM. Reason: spelling
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  #5  
Old 02-24-2021, 06:11 PM
smithflys23 smithflys23 is online now
 
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Quote:
Originally Posted by Frogman208 View Post
How I understand it from Whirlwind is the 300 and 330 series will be individually (modular) configurable to your specific needs but please ask first as I'm not affiliated with Whirlwind. I just really like the propeller and asking a lot of questions about their operations and business model.
This is important.
I was set to order one prop, but after talking to WW and explaining what my typical day of flying was like, they recommended the 74HRT. WW has many options, are really good about recommending a prop that will suit your needs.
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  #6  
Old 02-24-2021, 06:33 PM
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emsvitil emsvitil is offline
 
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Wait, I thought ALL angle-valve engines were counter-weighted...


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  #7  
Old 02-24-2021, 07:37 PM
scsmith scsmith is offline
 
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Quote:
Originally Posted by emsvitil View Post
Wait, I thought ALL angle-valve engines were counter-weighted...


The IO-360-A1A is not. The IO-360-A3B6 is.
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  #8  
Old 02-24-2021, 07:43 PM
David Z David Z is offline
 
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Sounds like the 330 is designed to replace the HRT series? I've been eyeing up the 2 blade 72HRT with aerobatic counter-weighted blades. I don't see the 330 on their website yet. Any word on when that's happening? This prop has me paying close attention.
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  #9  
Old 02-25-2021, 11:03 AM
Frogman208 Frogman208 is offline
 
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Quote:
Originally Posted by David Z View Post
Sounds like the 330 is designed to replace the HRT series? I've been eyeing up the 2 blade 72HRT with aerobatic counter-weighted blades. I don't see the 330 on their website yet. Any word on when that's happening? This prop has me paying close attention.
Hey David, I can't speak for Whirlwind but I believe the 300 and 330 series may be the future production lines since the 300/330 series Hubs are produced at Whirlwind instead of using the McCauley Hubs from other production lines. My 330 series uses the 72HRT blades and Whirlwind produced hub. The hub and blades are a work of art and I've seen how they produced the Hub/blades that can be modularly configured for individual needs. Maybe Whirlwind will see this thread and give an update. I don't like speaking for a manufacturer or their business model. I just like the product.
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  #10  
Old 03-02-2021, 03:33 PM
Whirl Wind Propellers Whirl Wind Propellers is offline
 
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Default What is the Whirl Wind 330 series?

Scott, I'm glad you like the propeller so much. To clear up what the 330 series is I'll quickly explain what we had been producing for many years and how we arrived at the 300 series.
1995 is when we started making composite constant speed propellers. Up until recently these propellers (including the HRT and 200RV series) used the thread-less McCauley based hub.
To save structural weight for less aggressive engines, we started from scratch and designed a smaller, lighter 300 series hub

Now, using a beefed-up design of the 300 series, the new 330 series replaces the legacy McCauley hub platform while saving several pounds of weight. Example of application is 72” diameter, 2 blade 330-2B/72H-72 (same style and performance as the legacy HRT 72 blades) for the (I)O-360. Or for the aggressive engines such as non-counterweighted IO-370/375’s or angle valve IO-360s, we put those same blades in a 330 3-bladed hub making the diameter 73” (330-3B/72H-73). The blades ARE NOT compatible between the McCauley hubs and the 330 hubs.

The website is undergoing updates, so call in or email for the most up-to date info.
Although our legacy propellers are no longer in production, we will continue to support them for parts and service.

Last edited by Whirl Wind Propellers : 03-03-2021 at 01:23 PM. Reason: replace spinner pic
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