eBay
  • Daily Deals
  • Sell
  • Customer Support
  • Shop Deals

Bidding has ended on this item.

 
Ships to:
United States
Delivery:
 
Ships to:
United States

Details about  3 blade ultralight aircraft composite propeller

See original listing
3 blade ultralight aircraft composite propeller
3-blade-ultralight-aircraft-composite-propeller
Item Sold
Item condition:
Used
Ended:
Jul 24, 2012 09:52:21 PDT
Winning bid:
US $202.50
10 bids ]
Shipping:
$17.79 Standard Shipping | See details
Item location:
Scottsdale, AZ, United States

Description

eBay item number:
320947309132
Seller assumes all responsibility for this listing.

Item specifics

Condition:

Used

Part Brand:

Competion Aircraft propeller

Warranty:

No

Manufacturer Part Number:

3 blade model 103

Ultra-Prop Blades - Molded high-strength, glass-reinforced composite. Color: Black. Tip-to-root length: 26-1/4 inches. (Makes a 59” dia. prop including hub). Score lines provided ½” apart near tips for cutting to custom diameters down to 48”. All blades identical and interchangeable. Hub can be setup for almost any bolt pattern. Right hand tractor setup with 18 degree pitch blocks, pitch blocks can be ordered to change pitch from company, I believe they are 7 dollars per pair and  3 pairs is needed to change pitch for all 3 blades.
Recommended RPM for this pitch and prop blade length is 1900 rpm as it is configured now, blades can be down sized to 52 in and 3100 rpm, see chart below.


Diameter
18° pitch
16° pitch
14° pitch
59"

1900 RPM

2400 RPM

2700 RPM

58"

2050

2450

2700

57"

2100

2700

3100

56"

2250

3100

---

55"

2400

---

---

54"

2550

---

---

53"

2800

---

---

52"

3100

---

---


Sample Calculation Using Charts

Use these charts to find the number of Ultra-Prop blades and their angle of pitch to match your specific ultralight.

To begin, you must know your propeller RPM, your engine HP and the diameter of your present prop or diameter that will match your airframe structural limit.

The following typical data is used in our calculation example:

Engine: Rotax 277, 25 H.P. @ 6200 RPM
Reduction Unit: Integral Rotax gear box 2.58:1
Prop RPM: 6200/2.58 = 2400 RPM
Prop dia.: 56 in. (assumed airframe structural limit)

First, we solve for a 59" dia. Ultra-Prop (See Chart A). We find that the 2400 RPM line intersects with a 25 HP curve in the 2-blade, 3-blade, and 4-blade envelopes. Reading the locations of these 3 points (circled) on the pitch degree lines identifies three 59" dia. Ultra-Prop options as 14 degree 2-blade, 11 degree 3-blade, or 9 degree 4-blade. To solve for a 52" dia. Ultra-Prop (See Chart B) we find that the 2400 RPM and 25 HP intersections identify only two different options: 18 degree 3-blade, or 13 degree 4-blade.

Since our example requires solving for a 56" dia., we must interpolate between the 52" and the 59 " dia. data we read from the two charts. A table such as the following is helpful:


3-Blade

Prop Dia. (")


52 56 59

Pitch (degrees)


18 (14) 11

Thrust (lb.)


163 (179) 182


To complete the table for 56" dia. (that is, to insert the numbers in parentheses), we note that this diameter is 56-52/59-52 = 4/7 = .57 of the way up from 52" dia. The pitch angle for 56" dia. can be approximated as follows:

For the 3-blade prop:

Incremental pitch angle = .57 (18 deg. - 11 deg.)

= .57 x 7 deg. =4 deg.

Pitch at 52" = 18 deg. minus incremental pitch decrease of 4 degrees equals 14 degrees.

We must subtract the 4 degrees from 18 degrees since we are going up 4/7 to 59". 

Questions and answers about this item

No questions or answers have been posted about this item.




Place bid

Time left:
Current bid:
(Approximately ##1##)
Shipping:
Import charges:
Your max bid:
Your max bid:
By clicking Confirm bid, you commit to buy this item from the seller if you are the winning bidder.
By clicking Confirm bid, you are committing to buy this item from the seller if you are the winning bidder and have read and agree to the Global Shipping Program terms and conditions - opens in a new window or tab. Import charges previously quoted are subject to change if you increase you maximum bid amount.
Cancel
Loading...
Resume bidding, if the page does not update immediately.
Place bid
Review and confirm your bid
Bid confirmation
d
h
m
s
day
hour
hours
FREE shipping
See item description
(Approximately ##1##)
(Enter ##1## or more)
(Enter more than ##1##)
Your max bid:
Increase max bid
Place bid
Confirm bid
Increase max bid
Cancel
Change bid
Close
, you've been outbid. Don't let it get away - bid again!
, you're the highest bidder on this item. Hope you win it!
, you're the first bidder. Hope you win!
, you're currently the high bidder, but you're close to getting outbid.
, this auction is almost over and you're currently the high bidder.
, you're the high bidder, but the reserve price hasn't been met.
Please enter your bid again.
Please enter a valid number as the bid price.
Enter an amount that is equal or greater than the minimum bid required. This can be found under the bid entry box.
Maximum bids can't be lowered once they're submitted.
This seller requires the buyer to have a PayPal account to purchase this item. Get a PayPal account here .
Your bid is greater than or equal to the Buy It Now price. We recommend you purchase this item via Buy It Now. If you still wish to bid, you may do so below.
Time left:
Current bid:
(approximately ##1##)
Your maximum bid:
(approximately ##1##)
Increase your maximum bid:
By clicking 1 Click Bid, you commit to buy this item from the seller if you're the winning bidder. Learn moreabout 1-click bid - opens in a new window or tab
day
hour
min
sec
days
hours
mins
secs
(approximately ##1##)
Winning bid:
Starting bid:
Close
Congrats! The auction has ended and you're the winner.
The auction has ended, but the reserve price was not met.
Sorry, the auction has ended and you were outbid.
Good news, you're the high bidder.
Sorry, you've been outbid.
You're the high bidder, but the reserve price is not met.
Please enter a higher amount than the current bid.
Maximum bids cannot be lowered once submitted.
Please enter a valid number.