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Forum: Rotorheads

16th Aug 2015, 11:25

Replies: 15

RHC rotor blades: ADs and SDRs

Views: 3,246

Posted By blakmax

Grit blasting

Steve

The way a surface is grit blasted depends upon the type of material. When one talks about grit blasting, the common perception is that you blast the **** out of the surface, such as if you...

Forum: Rotorheads

14th Aug 2015, 09:30

Replies: 15

RHC rotor blades: ADs and SDRs

Views: 3,246

Posted By blakmax

Primers

Hi CS

Primers perform several functions. Firstly, it is imperative that they form strong chemical bonds such that when the adhesive (or paint) reacts with it, the interface between the metal and...

Forum: Rotorheads

14th Aug 2015, 01:52

Replies: 15

RHC rotor blades: ADs and SDRs

Views: 3,246

Posted By blakmax

104 hr disbond

OK, I have had some further thoughts on this. The time since manufacture is what determines the extent of hydration if that is the cause of the disbond and hydration resitance is driven by the...

Forum: Rotorheads

12th Aug 2015, 12:45

Replies: 15

RHC rotor blades: ADs and SDRs

Views: 3,246

Posted By blakmax

Primer technology

Now we are talking about the real issue in adhesive bonding, and the same technology applies to corrosion and paint management. As I have posted many times, adhesive bonds rely on chemical reactions...

Forum: Rotorheads

10th Aug 2015, 11:27

Replies: 15

RHC rotor blades: ADs and SDRs

Views: 3,246

Posted By blakmax

Thanks for the support Cockney Steve. I...

Thanks for the support Cockney Steve.

I stress that this is not a QC issue. The QC guys can only check test data they are directed to follow. Adhesive disbonding is TIME dependent and almost...

Forum: Rotorheads

9th Aug 2015, 09:45

Replies: 15

RHC rotor blades: ADs and SDRs

Views: 3,246

Posted By blakmax

Bonding issues

Hi SLB

Firstly, thanks for confirming that these are the -7 blades.

One of the changes that was made for the -7 blades was to extend the overlap length substantially by extending the skins...

Forum: Rotorheads

8th Aug 2015, 12:36

Replies: 15

RHC rotor blades: ADs and SDRs

Views: 3,246

Posted By blakmax

RHC rotor blades: ADs and SDRs

OK, I tried a comment on a thread about someone complaining about the cost issues with the AD and the time in service for his R44 blades and RHC deadlines for discounts. One reply. Thanks...

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