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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesEngineerNovazzanoRolla SP Propellers Sagl
Rolla SP Propellers Sagl Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Rolla SP Propellers Sagl designs and manufactures propellers for marine vessels. Its services also include hydrodynamic engineering, such as hull and flow analysis and the design and optimization of propellers using CFD.

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Service area

Offering

Products & services

Industry:EngineerGeneral goods production
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4.0/5

Rolla SP Propellers Sagl

✓ Offered5
Marine propellers
Marine propellers for specific applications, with custom design, in-house development and manufacturing, including dynamic balancing and a CMM report for classification purposes.
Fully submerged propellers
Fully submerged propellers in NiBrAl up to 3 m diameter and 600 to 5000 Hp, with 3D design, panel method, CFD analysis and geometry optimisation.
Surface piercing propellers
Surface piercing propellers in NiBrAl or duplex stainless steel, with defined diameters and power ranges, based on series, tunnel tests and CFD calculations.
Resistance prediction
Resistance prediction of planing hulls and displacement hulls, using CFD, HRIC, panel method and determining resistance, trim, pressure distribution and flow field.
Sea keeping
Seakeeping simulations for fast yachts, with time-dependent Navier-Stokes solution, VOF method and calculation of wave resistance, accelerations and pressure loads.
Trust & reputation

ranQ Trust Score of Rolla SP Propellers Sagl: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of November 2026

Rolla SP Propellers Sagl scores 59.3 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.60.724%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.40.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.78.08%
Rolla SP Propellers Sagl scores 86.7 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Rolla SP Propellers Sagl scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
Rolla SP Propellers Sagl scores 14.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.14.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Rolla SP Propellers Sagl reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 4 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle44
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Via Roncaglia 6
6883 Novazzano

At a glance

Legal form
Limited Liability Company
UID
CHE-108.147.340
Founded
1983 · 43 years
Last commercial register change
July 25, 2025
Employees
11 to 20

Active in 1 of 26 cantons

  • TITicino
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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