BRITISH PARACHUTE ASSOCIATION ―
APPROVED TANDEM PARACHUTE MODIFICATIONS

SIGMA Tandem

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In Brief

In Detail

In Brief

'PLEASE NOTE: Some previously recorded clearances have been removed. For the full wording, go to ‘PART 2 - TANDEM - GENERAL’ and see RIGGERS 15th Feb 01, Item 5, TANDEM MODIFICATIONS

DateBrief Description
Dec 01

Acceptance of Tandem Sigma
Dec 99

Any Tandem Main into any Tandem Container IMPORTANT See full wording in Part 2 - Tandem - General section.
Jun 04

Material tags added to passenger harness quick release buckles on Tandem Sigma
Apr 05

To fit locking pins to the snap hook of the Tandem Sigma student harness.
Aug 05

To fit locking pins to the snap hook of the Tandem Sigma student harness. (More info)
Oct 05

To allow RWS Tandem Sigma reserves to be pro-packed, as per Tandem Sigma online manual.
Feb 15That the Next Student harness be used with all Tandem Sigma systems (and vice versa) (Cleared for all)
Jul 15That Ex-Military Vector Student Harness systems (System #3 & #4) be accepted for use with Tandem Sigma containers (SN 52193 & SN 52194) (NOT Cleared for all)

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In Detail

PLEASE NOTE: Some previously recorded clearances have been removed. For the full wording, go to ‘PART 2 - TANDEM - GENERAL’ and see MISSING LINK RIGGERS 15th Feb 01, Item 5, TANDEM MODIFICATIONS

RIGGERS 6th Dec 01

9. A.O.B

  1. A letter had been received from Bill Sharp and circulated to those present requesting acceptance of the new Relative Workshop (Vector) Tandem Sigma container system and passenger harness for use at BPA Clubs and Centres.
Mr Sharp had inspected the complete assembly and was satisfied with the system.

The Chairman advised those present that the equipment had been well tested in the USA. Both the NCSO and another Rigger Examiner had seen the equipment and were both satisfied with it.

It was proposed by Bill Sharp and seconded by Kim Newton that the Tandem Sigma system be accepted for use at BPA Clubs.

For: 4 (incl. 1 by proxy)Against: 0Abstentions: 3

Carried

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RIGGERS 2nd Dec 99 & STC 10 Feb 00 (Safety Information 1/00)

Any recognised Tandem Main canopy into any BPA accepted Tandem Container. IMPORTANT: See full wording in Part 2 - Tandem - General section.

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RIGGERS 10th Jun 04

3. PROPOSAL FROM BILL SHARP FOR MODIFICATION TO STUDENT TANDEM EQUIPMENT

At the previous meeting, the Committee had discussed a proposal from Bill Sharp involving the RWS Tandem Sigma Student Harness. The proposal had been to add some tape extension handles to the existing passenger harness quick release buckles, for ease of release by the Tandem Instructor.

At the previous meeting it was felt by those present that as this modification had already been approved in the past and had been given a ‘blanket’ approval (15 Feb 2001). The Committee had felt that Bill's proposal could be included in this ‘blanket’ approval, even though the Tandem Sigma had not been in use then. The Chairman had been asked to contact Bill on this matter.

Bill Sharp had submitted a letter to the Committee on this item, a copy of which had been circulated with the agenda.

Bill had stated that in Feb 2001, he was given a clearance for the initial modification to the Tandem Vector student harness. At that time, the modification was approved with a blanket approval for all to use on the Tandem Vector system.

The Tandem Sigma was not approved for use in the UK until Dec 2001, about a year later. At the same Dec 2001 meeting, the NCSO advised the Committee that the Tandem Sigma was a completely different system to the Tandem Vector. Thereafter, because of these differences, it was decided to treat it separately, complete with a new section added to the BPA Approved Tandem Modification website, specifically for Tandem Sigma clearances and modifications.

Bill Sharp had also stated that he had attended the Feb 2002 Rigger's meeting, and whilst there, he asked a general question about the use of the previous ‘Tandem Vector student harness tape extensions clearance’ for use with the new Tandem Sigma harness. He stated that he was advised that as it was a new and different system, that it would be best to re-submit the clearance in the Tandem Sigma's name. At that time, for various reasons he never bothered but then decided to include it with my other clearance for attention at the last meeting.

Bill had stated in his correspondence that the above ‘blanket clearance’ suggestion was never given, nor was it ever intended to be given. The acceptance was for general use on the Tandem Vector. Bill had stated that in his opinion this ‘blanket clearance’ assumption is a reversion back to the days of anything goes, something that he had spent a lot of time getting sorted out. Bill stated that the Tandem Sigma (TV3) harness may be the same or similar as the Tandem Vector harness (TV2) but they belong to two different systems, and should have separate clearances.

The Committee accepted Bill's comments on this matter.

Bill Sharp had therefore, re-applied for the same Tandem Sigma student harness tape extensions application as previously submitted.

Following further discussion on this matter, it was proposed by Bill Sharp (proxy) and seconded by John Harding that Bill Sharp's modification to add some tape extension handles to the existing passenger harness quick release buckles to the RWS Tandem Sigma Student Harness as per the drawings previously submitted.

For: 5 (incl. 2 by proxy)Against: 0Abstentions: 1

Carried

A proxy vote in favour of this item had been received from Allan Hewitt.

Pete Sizer said that he would put forward a similar proposal for consideration at the next meeting with regard to extension handles to be used on other Tandem equipment.

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RIGGERS 14th Apr 05

6. PROPOSED TANDEM MODIFICATION - BILL SHARP

A proposal had been received from Bill Sharp requesting a modification to the RWS Tandem Sigma Student Harness, which had been circulated with the Agenda, together with relevant paperwork and drawings.

The Committee were given details of the proposed modification, which included drilling a hole into each of the two Tandem Sigma Student Harness butterfly snap hooks (the butterfly gate part, not the main hook), in order to insert a locking pin. This is to stop the snap hook inadvertently opening, as reported at a recent Riggers Committee Meeting.

Bill had stated that the locking pin idea is also used by some other Tandem Manufacturers, and has been used by RWS on earlier versions of their RWS Tandem harnesses.

Some concern was expressed by those present because Bill had not provided a diagram or details of the location/dimension of the hole or specified the type of locking pins to be used. The Committee felt that they would be unable to give the modification general clearance until Bill had supplied this information.

Following discussion, it was proposed by Bill Sharp and seconded by John Harding that the above modification be accepted for use by Bill Sharp only.

For: 4Against: 1Abstentions: 0

Carried

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RIGGERS 11th Aug 05

3. PROPOSED STUDENT EQUIPMENT MODIFICATION

At the Riggers Committee Meeting of 14 April 2005, the Committee had accepted a proposal from Bill Sharp for a modification to the RWS Tandem Sigma Student Harness. The modification included drilling a hole into each of the two Tandem Sigma Student Harness butterfly snap hooks (the butterfly gate part, not the main hook), in order to insert a locking pin. The Committee had accepted this modification for use by Bill Sharp only, as at the time there was no diagram or details of the location/dimension of the hole or specified the type of locking pins to be used. The Committee had felt that that they would like to see this modification accepted for general use. Bill had therefore re-submitted the relevant paperwork and drawings, copies of which had been circulated with the agenda for consideration by the Committee.

Following some discussion, it was proposed by Bill Sharp and seconded by John Harding that the above Student Equipment Modification be accepted for general use on any student harnesses that have the same butterfly snap hooks as the Sigma (part nos: MS22042, MS22042-1, MS70121).

Carried Unanimously

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RIGGERS 6th Oct 05

11. A.O.B

  1. A letter had been received from Bill Sharp, which had been circulated to those present regarding Tandem Sigma reserves and Pro-Packing.
Bill Sharp wished to bring to the attention of the Committee that Relative Workshop had recently released an online copy of the Tandem Sigma system manual. (http://www.relativeworkshop.com/support_manuals.html)

In this manual, RWS show and approve an ‘on the floor’ version of pro-packing their reserves (VTC 360), into their Tandem Sigma system. In the past, their Tandem Vector manual showed a flat packing method. This ‘pro-packing’ method now conflicts with a previous Riggers Committee ruling (19 June 1997) that pro packing was not applicable or acceptable for the packing of Tandem reserves.

Bill Sharp had stated that the Riggers Committee recently issued a Safety Information (No 01/05) - Packing Manuals, which stipulated to reserve packers, the importance of following manufacturer's packing instructions and that they must have the manuals to hand.

As it had been stated in the past that Tandem reserves must not be pro-packed. Bill Sharp had expressed some concern that because of the item in the new RWS Tandem Sigma Manual that actually recommends it. He did not want people to think that every Tandem reserve should or must now be pro-packed just because RWS are stating they are happy with it going into their system.

Following some discussion, it was decided by those present to rescind the rule (above) from the rule in the Minutes of 19 June 1997 and refer to BPA Safety Information (No. 01/05) - Packing Manuals, which stipulated to reserve packers, the importance of following manufacturer's packing instructions and that they must have the manuals to hand.

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RIGGERS 05th Feb 15

8. STUDENT PARACHUTIST EQUIPMENT CHANGE PROPOSAL

A proposal from Kim Newton together with supporting paperwork had been circulated with the Agenda requesting that the Next Student harness supplied by Paratec be used with the Sigma Tandem Container supplied by UPT/Relative Workshop and that the Sigma Student harness supplied by UPT/Relative Workshop be used with the Next Tandem Container supplied by Paratec.

After consideration, it was proposed by Kim Newton and seconded by Dave Major that the above request be accepted.

Carried Unanimously

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RIGGERS 30th Jul 15

6. EQUIPMENT CLEARANCE REQUESTS FOR EX-MILITARY TANDEM EQUIPMENT AND TWO EX-MILITARY STUDENT HARNESSES

b) That the Relative Workshop/UPT Ex-military Wonderhog Dual Container / Tandem Student Harness system (serial no. #3) be accepted for use with the UPT Sigma container (serial no. 52193)

c) That the Relative Workshop/UPT Ex-military Wonderhog Dual Container / Tandem Student Harness system (serial no. #4) be accepted for use with the UPT Sigma container (serial no. 52194)

The Advanced Riggers endorsing/recommending the above equipment clearance requests are Andy Page and Malcom Knox.

Following discussion it was proposed by Andy Page (proxy) and seconded by Malcom Knox (proxy) that the above proposed equipment clearance requests be accepted.

For: 7 (incl 2 by proxy)Against: 0Abstentions: 1 (John Curtis)

Carried

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