# Two Bladed Prop? **URL:** \ **Category:** Guest Discussion\ **Created:** [February 25, 2000, 3:28pm UTC](https://forum.cirruspilots.org/t/two-bladed-prop/36616 "2000-02-25T15:28:59Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![UnknownPreviousUser](https://sea1.discourse-cdn.com/copa/user_avatar/forum.cirruspilots.org/unknownprevioususer/32/89805_2.png) [@UnknownPreviousUser](https://forum.cirruspilots.org/u/UnknownPreviousUser)\ **Post date:** [February 25, 2000, 3:28pm UTC](https://forum.cirruspilots.org/t/two-bladed-prop/36616/1 "2000-02-25T15:28:59Z")
Has anyone received an SR20 with the two bladed prop? If so, I would like to know the performance figures. After all, the money Ovation2 gained 6 kts. switching to a two blader! ---
**Author:** ![UnknownPreviousUser](https://sea1.discourse-cdn.com/copa/user_avatar/forum.cirruspilots.org/unknownprevioususer/32/89805_2.png) [@UnknownPreviousUser](https://forum.cirruspilots.org/u/UnknownPreviousUser)\ **Post date:** [February 25, 2000, 3:52pm UTC](https://forum.cirruspilots.org/t/two-bladed-prop/36616/2 "2000-02-25T15:52:28Z")
> Has anyone received an SR20 with the two bladed prop? If so, I would like to know the performance figures. After all, the money Ovation2 gained 6 kts. switching to a two blader! I think Sam Johnson’s plane has a 2-blade prop. Cirrus says the performance differences are insignificant, except a slightly higher exterior noise level with the 2-blade. ---
**Author:** ![UnknownPreviousUser](https://sea1.discourse-cdn.com/copa/user_avatar/forum.cirruspilots.org/unknownprevioususer/32/89805_2.png) [@UnknownPreviousUser](https://forum.cirruspilots.org/u/UnknownPreviousUser)\ **Post date:** [February 25, 2000, 4:17pm UTC](https://forum.cirruspilots.org/t/two-bladed-prop/36616/3 "2000-02-25T16:17:34Z")
> Has anyone received an SR20 with the two bladed prop? If so, I would like to know the performance figures. After all, the money Ovation2 gained 6 kts. switching to a two blader! The Mooney gains were quoted as being from a complete re-design of the prop. A much more exotic blade shape than the older three bladed prop. ---
**Author:** ![UnknownPreviousUser](https://sea1.discourse-cdn.com/copa/user_avatar/forum.cirruspilots.org/unknownprevioususer/32/89805_2.png) [@UnknownPreviousUser](https://forum.cirruspilots.org/u/UnknownPreviousUser)\ **Post date:** [February 25, 2000, 4:47pm UTC](https://forum.cirruspilots.org/t/two-bladed-prop/36616/4 "2000-02-25T16:47:06Z")
> Has anyone received an SR20 with the two bladed prop? If so, I would like to know the performance figures. After all, the money Ovation2 gained 6 kts. switching to a two blader! Just the discussion I wanted to raise; 2 vs 3 blades being my hardest choice on how to equip position 170. Over the years I’ve owned 3 77/78 Rockwell 114’s. Ser. no. 243 and 362 with 2 blades and ser.no. 427 with a 3 blade. 243 and 362 were 5 and 4 knots (respectively) faster than 427. Also, with Telex 3500 headsets, (passive) the cockpit noise was easier to take. 2350 rpm on tne two blade, and tne “drone” disappeared whereas the 3-blade had a higher pitched drone that you couldn’t get rid of. Cockpit noise is perhaps a moot point with the ANR headsets we’ll all be using. I’d also like to hear from someone who’s flown both on production SR-20’s. Call me vain ,but if there’s no performance difference, I’ll spend the extra for the looks of the 3 blade. If I have to give up more than 2 or 3 knots , I’ll stick to the two blade. ---
**Author:** ![UnknownPreviousUser](https://sea1.discourse-cdn.com/copa/user_avatar/forum.cirruspilots.org/unknownprevioususer/32/89805_2.png) [@UnknownPreviousUser](https://forum.cirruspilots.org/u/UnknownPreviousUser)\ **Post date:** [February 26, 2000, 12:13am UTC](https://forum.cirruspilots.org/t/two-bladed-prop/36616/5 "2000-02-26T00:13:13Z")
> Has anyone received an SR20 with the two bladed prop? If so, I would like to know the performance figures. I spoke to a contact in Cirrus Design, and he tells me that there is no measurable difference in performance (cruise) between the two props. He also said there is a significant reduction in noise with the 3 blader. Although the POH only shows the difference as 0.01 dB, this figure is actually made-up. The noise testing for the two blade prop was done, but for the 3 blade it was only demonstrated to be quieter, and a nominal figure put down for certification. The actual difference, I am told, is over 3dB, which is well worthwhile. ---
**Author:** ![UnknownPreviousUser](https://sea1.discourse-cdn.com/copa/user_avatar/forum.cirruspilots.org/unknownprevioususer/32/89805_2.png) [@UnknownPreviousUser](https://forum.cirruspilots.org/u/UnknownPreviousUser)\ **Post date:** [February 25, 2000, 6:19pm UTC](https://forum.cirruspilots.org/t/two-bladed-prop/36616/6 "2000-02-25T18:19:35Z")
> > Has anyone received an SR20 with the two bladed prop? If so, I would like to know the performance figures. After all, the money Ovation2 gained 6 kts. switching to a two blader! > Everything I’ve heard and read from Cirrus says there is very little difference. In fact, the POH shows virtually no noise difference. I’m wrestling with the same issues. Here’s how I stack it up: 2 Blade: + save about 15 lbs. (Better usefull load) ``` + Better Weight & Balance envelope + Perhaps marginally faster ``` 3 Blade: + Looks better ``` + Perhaps marginally quieter. ```