Bolly Optima Series Three
supreme, with silky smoothness at high efficiency levels.
Unlike our other BOS propellers, the Series 3 are ground adjustable to the required pitch and engine load. We have optimised the design to allow for this. As with all props they are at their most efficient at one optimal pitch setting, and it is this setting that we quote. The less a prop is changed from this the better the performance, although we have customers reporting excellent performance out to 7 degrees outside this parameter.
Hubs to suit the 75mm PCD bolt pattern, ie many Rotax, Hirth etc are available in 2B, 3B and 4B.
We also have 2B and 3B hubs for most other common bolt patterns such as Rotax C box (100mm PCD), some Subaru’s (4 inch / 101.6mm PCD) and to suit Rotax 912 / 914 (old and new with rear face drive stud holes).
Blade Info – Pricing
The below prices are AU$ retail inc GST and Export retail non GST
|Product Code||Description||AU$ Retail||Export$ Retail|
|BOS3 72 x 60 S L DT||72 x 60 Stander LH – (single) adjustable blade, with DT edge||$395.00||$359.09|
|BOS3 72 x 60 S R DT||72 x 60 Stander RH – (single) adjustable blade, with DT edge||$395.00||$359.09|
|BOS3 68 x 58 S R DT||68 x 58 Stander LH – (single) adjustable blade, with DT edge||$380.00||$345.45|
|BOS3 68 x 58 S R DT||68 x 58 Stander RH – (single) adjustable blade, with DT edge||$380.00||$345.45|
|BOS3 62 x 52 S L DT||62 x 52 Stander LH – (single) adjustable blade, with DT edge||$365.00||$331.81|
|BOS3 62 x 52 S R DT||62 x 52 Stander RH – (single) adjustable blade, with DT edge||$365.00||$331.81|
|BOS3 53 x 50S R DT||53 x 50 Stander LH – (single) adjustable blade, with DT edge||$350.00||$318.18|
Hub Info – Pricing
We are proud of these magnificent hubs … truly works of art. CNC machined into 7075 alumiuium plate and “gold” anodised for a great look. So good, we have given them a lifetime warranty.
|Product Code||AU$ Retail||Export$ Retail|
|BOS3 HUB 2B||$475.00||431.81|
|BOS3 HUB 3B||$495.00||$450.00|
|BOS3 HUB 4B||$595.00||$540.90|
Complete Set Prices
The below prices are AU$ retail inc GST and Export retail non GST .
The below prices INCLUDES standard prop mounting hardware (washer plate and engine mounting bolts). We need to have details of your engine and gearbox etc so we can provide the correct hardware. If your application needs something different to standard applications (ie a spacer), it will be an extra purchase, and quite often we will have it in stock.
|PROP KIT||2B AU$||2B Export||3B AU$||3B Export||4B AU$||4B Export|
|BOS3 72″ L/H or R/H full prop kit||$1,310.00||$1,190.90||$1,725.00||$1,568.18||$2,220.00||$2,018.18|
|BOS3 68″ L/H or R/H full prop kit||$1,280.00||$1,163.63||$1,680.00||$1,527.27||$2,160.00||$1,963.63|
|BOS3 62″ L/H or R/H full prop kit||$1,250.00||$1,136.36||$1,635.00||$1,486.36||$2,100.00||$1909.09|
|BOS3 53 x 50 R/H full prop kit||$1,220.00||$1,109.09||$1,590.00||$1,445.45||$2,040.00||$1,854.54|
News : Latest overspeed testing has gone to mach 1.01 tip speed (for proving the DuraTuff leading edge).
The Bolly BOS3 68 x 58 (left and right hand versions) in our standard hub (66″ 3B prop) have been certified for use in the Airborne XT series of Trikes, with Rotax 912 or 582. This entailed, amongst other things, over speed testing at mach .97 tip speed using every bit of power from a 200hp engine – an awesome experience that has given us enormous confidence in our product. And then there was the 10 ton pull test + more.
Trike with Rotax 582 3.47 gearbox using 68″ R/H blades in a BOS3 – 3B hub A perfect combination on Airborne Edge machines, winning rave reviews from the many who are using this combo.
Extensive Trike testing has shown our props are suitable on all Rotax 912 / 582 / 503 powered trikes from slow to fast Trike Types. Ring or email for full details.
Sapphire. The most recent tests have been the BOS3 53 x 50 SR as a 3B prop, (trimmed slightly in diameter to 60″) for use on the Sapphire. Initial feedback is
exceptionally good. We are waiting for a full report from Steve Dumnsey of Sapphire Aircraft (03 54397168).
Savannah / Lightwing etc with 100hp Rotax 912S is great when using the BOS3 72 x 58 S R blades in a BOS3-3B hub. True size 70″ 3B, or alternatively if ground
clearance or cruise speed are priorities – the same but using the BOS3 68 x 58 SR blades (true size = 66″ 3B).
Skyfox / Lightwing / Rans with Rotax 912 using 72 x 60 S R blades in a BOS3 – 2B hub, depitched. True size is 70 x 52 2B. We prefer the 3B prop, see below …
Lightwing / Rans / Skyfox / Gazelle etc with Rotax 912 using 68 x 58 S R blades in a BOS3-3B hub, depitched. True size is 66 x 48 3B. Awesome smoothness.
Lightwing (or similar) with Rotax 582 2.62 gearbox using 68 x 58 S L blades in a BOS3 – 3B hub, depitched. True size is 66 x 45 3B. Can also be used as 2B with slightly more pitch.
Lightwing (or similar) with Rotax 582 / 532 2.58 box using 68 x 58 S L blades in our BOS3-2B 75mm PCD hub. Depitch to 18 degrees at 22″ radius. True size is 67.5 x 44 2B
The Cobra Arrow 108hp Subaru belt drive is using 72 x 60 S R blades in a BOS3 – 3B hub, pitched up. Awesome performance, we credit the prop, Tom credits the airframe. Both win.
The 72 x 60 S Left or Right is proving to be excellent on many different applications, the most common being Subaru engined machines such as Foxcon Terrier or Gyro’s.