[ashking101]

This is really a very good news...No wonder, Nissan Magnite bagged BBC TopGear India's Compact SUV of the Year 2021 award today...

https://twitter.com/TopGearMagIndia/...143745/photo/1

[VKumar]

An acquaintance has booked the Magnite and is awaiting the delivery. Today he shared this video link with me, which is probably the first crash of the Magnite reported as of now. Although I am unsure of the credibility part, but what I can observe from the video (It's in Hindi) is:

• Horrific full frontal impact, looks like the front has absorbed the impact well
• Driver came out alive with a few fractures, coming out live in such a collision is a big feat itself IMO
• Driver himself posted everything over Facebook and written his comments too. In the last 1/3rd of the video
• I can see that he has reported the accident to have happened on 27th March, and still he reporting it on Facebook within a week, means no major or life threatening injuries must have happened.

https://www.youtube.com/watch?v=NWOtyN0aaCg

The kid has proven his strength in this case IMO

[skarthiksr]

Was reading through Global NCAP's protocol on Seat-belt reminder(SBR).

https://static1.squarespace.com/stat...ocol-Adult.pdf

3.2.5 Seat Belt reminders (SBR)
Global NCAP will assess SBR in the front seating positions according to Euro NCAP Assessment Protocol – SA Version 5.6 or later (Chapter 3). SBRs will give 0.5 point for the driver seating position and 0.5/N point for each front passenger position that meets the requirements (N is the number of available front passenger positions). Hence the maximum number of SBR points achievable is 1. A car is eligible for scoring SBR points if the following conditions are met:
- The driver and front passenger’s head, neck, chest score are orange, yellow or green.

The last line says ".. A car is eligible for scoring SBR points if the driver and front passenger’s head, neck, chest score are orange, yellow or green." Now, if we take a look into the chest score of the Magnite in ASEAN NCAP, the chest score of driver is brown(weak) which means that it shouldn't be eligible for any SBR point as per Global NCAP (The guideline says AND meaning both driver and passenger should meet the condition)


However, ASEAN NCAP has awarded 3 SBR points(Out of 6) as per ASEN NCAP protocol for SBR.



So, does this mean that if the same score turns out for the chest(weak) in Global NCAP for Magnite, it won't get any SBR point(even 0.5 for passenger)?

[ron178]

Originally Posted by skarthiksr

So, does this mean that if the same score turns out for the chest(weak) in Global NCAP for Magnite, it won't get any SBR point(even 0.5 for passenger)?

The lower performance limits for chest compression have been revised among the newer NCAPs. In fact, most newer NCAP protocols still conduct the offset-deformable barrier test out of 16.00 points like Global NCAP (though they also conduct other tests and don't determine the star rating solely from the ODB test) but the major differences in the frontal ODB test protocol solely are:

• HIC(Head Injury Criterion)15 has been used instead of HIC36 and the values of the criterion for upper and lower performance limits have been modified accordingly.
• The lower performance limit for chest compression has been reduced to 42mm.
• The +1 modifier for seatbelt reminder has been removed from the ODB test score and has moved to the safety assist section, meaning that the maximum number of points that can be obtained in the ODB test is now 16.00 and not 17.00 like Global NCAP.
• Some other modifiers for structural asymmetry, front passenger head contact with the dashboard, fuel leakage have been added and the A-pillar-displacement modifier, passenger compartment integrity modifier, and footwell rupture modifier can now be applied on the corresponding body parts of the front passenger too. However this has been implemented only in some of the newer NCAPs, the protocol that the Magnite was tested to in the ASEAN NCAP does not include these. These are for future reference only and you may effectively ignore this point. They are not used by ASEAN NCAP yet.

Your question concerns the second of the above points.
The visual scoring (colouring of body parts) criteria are the same across both NCAPs.

Green 4.000 points
Yellow 2.670 - 3.999 points
Orange 1.330 - 2.669 points
Brown 0.001 - 1.329 points
Red 0.000 points

Each body part has a lower performance limit (meaning higher injury) and a higher performance limit (lower injury). These injury measures are obtained from various sensors in the dummies, like Head Injury Criterion obtained from the accelerometers at the centre of mass of the dummy's head, and chest compression (the one relevant to your question) from sensors in the dummy's chest.

If biomechanical values for a body part are above the lower performance limit, the part scores 0.00 points for that body region and it is coloured red.
If the injury measures recorded are below the higher performance limit, the part scores 4.00 points and is marked green.
If the biomechanical values recorded are between the higher and lower performance limit, the score is calculated by linear interpolation and can score brown -> orange -> yellow as the value changes between the lower performance limit to the higher performance limit.

Now, coming to the ASEAN Magnite's chest:
The protocol to which the Magnite was tested specifies a higher performance limit of 22mm and a lower performance limit of 42mm.

The protocol to which Global NCAP tests cars specifies a higher performance limit of 22mm and a lower performance limit of 50mm.


Hence, I could qualitatively finish it off by saying that it's harder to score for chest compression in the ASEAN NCAP than the Global NCAP, but I'm interested in checking it mathematically just to be sure. To make my work easier I'm just going to take 1.330 points as 4/3 points and 2.670 points as 8/3 points. Anyone who has an objection to the loss of precision is requested to calculate precisely and post it here.

The Magnite scored a brown chest in the ASEAN NCAP frontal ODB test. So, under their protocol, chest compression would have the following range of values (marked in bold):
Red: Compression ≥ 42.00mm
Brown: [(42.00mm - (((4/3)/4)*20.00mm)), 42.00mm) (for illustration of the linear interpolation of values)
=[35.33mm, 42.00mm)
Orange: [28.66mm, 35.33mm)
Yellow: [22.00mm, 28.66mm)
Green: Compression < 22.00mm

ASEAN NCAP hasn't told us what the exact chest compression is to we'll have to work within a range.

Now, let's check Global NCAP's conditions.
Red: Compression ≥ 50mm
Brown: [40.66mm, 50mm)
Orange: [31.33mm, 40.66mm)
Yellow: [22.00mm, 31.33mm)
Green: Compression < 22.00mm

Hence, the Magnite's chest could be coloured orange or brown by Global NCAP depending on what the value is, with a 4:1 probability in favour of an orange chest. Orange if compression is between 35.33mm and 40.66mm, and Brown if it is between 40.66mm and 42.00mm. Accordingly it could or could not qualify for SBR assessment.

This of course is assuming the following:
-The structure and restraints for the Magnite are identical in both markets
-The Unstable structure, A-pillar displacement, Steering wheel contact, and Shoulder belt load modifiers will not be applied in the Global NCAP either (the ASEAN NCAP did not apply any modifiers)
-The chest score obtained by interpolating chest compression was lower than the chest score obtained by interpolating viscous criterion and was hence used. If the score was based on viscous criterion then the chest would have definitely been brown even under Global NCAP protocol and it would not be eligible for SBR assessment..

Note than India is not a member country of the Association of South East Asian nations and consequently ASEAN NCAP ratings are not vald for Indian cars due to possible differences in production. The cars tested by Global NCAP have been type-approved for India by the ARAI while the cars tested by ASEAN NCAP have not. It is a very big risk to be using data from ASEAN NCAP tests for India and I advise against it.

Source for test protocol that the Magnite was assessed to

[ron178]

Originally Posted by Aditya

Nissan has confirmed that the Magnite sold in India has earned 4 stars in crash tests conducted by ASEAN NCAP.

Update: Nissan India has deleted all social media communication that confirmed the ASEAN NCAP rating for the Indian-market model.



IMO there's a fair chance it might be in the Global NCAP release for India expected this month. I hope it scores well.

[jeganatu]

Nissan Magnite (2 airbags)
The Nissan Magnite scored four stars for adult and two for child occupant protection. The Magnite was tested in its most basic safety spec fitted with two front airbags and ABS. During the assessment the model showed a stable structure and marginal protection to the driver’s chest.
Surprisingly, the model is still being sold with a lap-belt in the rear centre seat instead of three point belts, without ISOFIX anchorages for the Child Restraint Systems (CRS). There is no Electronic Stability Control (ESC) and no side head impact protection as standard.

https://www.youtube.com/watch?v=1WzF3HnmK0c

https://static1.squarespace.com/stat...-factsheet.pdf