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G-88 Tow Release standard lever
G-88 Tow Release standard lever TOST G-73Tow Release  No Lever TOST G-73 Tow Release Standard Lever TOST G-88 Tow Release No Lever TOST G73/1-83 Tow Release TOST G-72 Tow Release G-88 Tow Release standard lever

TOST G-Series Tow Release

Sale Price: $495.00

SKU: 4916,4917,4918,4951,4954,4955,4956,4957,4958,4960,4961,4963

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Detailed Description

TOST G-Series Tow Release

General Description

Since 1952 TOST company has manufactured releases for gliders. The first product was the manual actuated nose release type “BUG”. 1953 followed the first TOST safety release (Universal), that has been installed near to the center-of-gravity. Its automatic release at a defined cable angle made the winch launch safe.

TOST releases are the standard worldwide for safe gliding starts for all types of starts and are being operated “from Australia to Cyprus”. In total, more than 73.000 units have been produced. All are still being serviced, also those units from the very beginning. Most of the releases are still serviceable and even in service for further decades.

Overhaul (OH) releases are subject to availability. Most tow releases are in stock. Some may require special order.

W&W strongly recommends taking pictures of your tow release needing replacement and emailing to us for type verification.

History of TOST Releases

During the decades, TOST releases have been developed further and optimized as well. The sequence of the release types is as follows:
For the nose and tail releases: BUG - E 72 - E 75 - E 85
For the center-of-gravity releases: UNIVERSAL - KK - G 72 - G 73 - G 88

One important step to high dimensional accuracy and rigidity of the releases was the use of precision casting components: hook, segment, ring automatic as well as fine cast release housing as successor of the welded release housing (up to type E 72 and G 72). When used in vintage gliders, please always check the installation space: narrow release brackets possibly may not allow the installation of the latest release types G 73 / G 88 and E 75 / E 85, which need a bit more space.

A further milestone was the increase of the cable force from 11,7 kN for the predecessor types to 14,1 kN for the E 85 and G 88 series.

The exchange of the elder release types against the recent ones has always been guaranteed through the retention of the outer dimensions and fixation holes of the releases.

Important Operating Advise to the Connecting Ring Pair

Connecting ring pairs are vital for the safe connection and reliable separation of tow cable and tow release. The type certification stipulates that every TOST tow release must be operated only with a ring pair meeting the aeronautical standard LN 65091.

Such a ring pair must be stamped with the manufacturer's name and the standard number. Welded ring pairs are generally prohibited and imply a potential danger for the pilot. Their use voids our warranty for the release. Welded rings damage the release. Moreover, undersized or deformed rings can cause the ring pair to jam the release and inhibit correct operation under load.

Ring pairs must be visually checked and measured at regular intervals to ensure correct operation. Ring pairs that deviate from the standard dimensions must be replaced.

Core Return

Send in your core tow release for an $80 credit (most releases).

Use above dropdown box for Tow Release selection and final price.
Overhaul (OH) Releases are subject to stock on hand. Call to confirm availability.

G 88 Series

The Europa G 88 safety release is installed at the center of gravity of gliders and motor gliders. The release is approved by the German aviation authority (LBA) under TCDS 60.230/2 to the airworthiness regulations for tow releases: for cable loads up to 14.1 kN, for maximum all-up weight of 900 kg; automatic release at a cable angle of 83° ± 7°, maximum manual release force is 140 N. The release also conforms to JAR 22 regulations.

G 88 With Lever

Standard version, with 4-position release lever.

G 88 Without Lever

Allows a release lever to be fitted by the aircraft manufacturer, or the release cable can be attached directly to one of the segment holes.

G 88/1-83

For the cramped conditions in some gliders: the segment is shortened by three holes and the segment bolt is extended for fitting a special release lever at the side of the release body.

P/N Release Mass g
028000 G 88 with lever 720
028200 G 88 without lever 670
028400 G 88/1-83, bushing 33x10x2, for lever left hand 670
028450 G 88/1-83, bushing 34.5x8x1, for lever left hand 670
028500 G 88/1-83, bushing 34.5x8x1, for lever right hand 670


Do not change the glider manufacturer's original positioning of the release

Before removing the release, make a sketch, or take a photo, as a record for installing it again.

Tools needed: You need only some basic tools to install or remove the release in one piece. A No. 5 Allan key, a 10 mm closed-end wrench, or two 10 mm open-end wrenches.

To install a release use DIN 931-10. 9, or DIN 912-12.9 M6 bolts and DIN 985-M6-6 hexagon nuts.

New bolts must have the same shaft length as the original ones. It is especially important that the thread is not subjected to load, and that the shaft does not protrude more than the thickness of a washer beyond the mounting, as the nut cannot then be tightened properly.

Torque: MA = 8.75 Nm (77.5 lb-in) The release must be installed so that it is not under stress. When a release has been removed, new nuts and bolts should be used when it is reinstalled.

After Installation

After installing a release, and as part of the periodic aircraft inspections, these checks must be carried out:
• You must be able to open the unloaded release completely by applying a force of 7.5 ± 1.5 daN (16.5 ± 3.3 lbs.) - measured on a spring balance - on the manual release lever in the cockpit over the full travel of the release actuation arm.
• When the release hook is under a load of approx. 150 daN (330 lbs.), you should still be able to operate the manual release lever in the cockpit with the same force, i.e., 7.5 ± 1.5 daN (16.5 ± 3.3 lbs.).
• If both a nose and a center-of-gravity release are connected to the same release cable, the manual force required to operate them from the cockpit may not exceed 17 daN (37 lbs.), even if one of the releases is under a load of 150 daN (330 lbs.).

Care and Cleaning

The release is largely protected against corrosion. But certain components like the hook cannot get surface protection due to strength reasons. Therefore regular cleaning and servicing is imperative for maintaining the required security level.

Regular Check

During operation and especially when landing away from paved runways, your release is exposed to dirt and pollution. So it is important to check the release before and at the end of every flight operation and to clean it if necessary. This point is indispensable especially if not used daily.


Why Buy From Us?

Wings & Wheels has been serving the sport aviation and soaring community for more than 20 years.  We have the largest and most comprehensive inventory of sailplane and soaring supplies.  Nearly everything you find here is in stock and can ship the same day.  We are here for aviators, businesses, mechanics and government.  Our goal is to fulfill your order promptly and as conveniently as our resources allow.

Wings & Wheels is proud to be the American representative for HpH Ltd, producer of the finest quality 304 sailplanes.

Our staff has over 8,000 hours of flying experience in gliders and airplanes. Wings & Wheels is staffed by Sean, Garret, Miki, Matt and Linda. You will have a friendly voice pick up when you call. Our staff is trained to promptly take your orders and ship your products.

Shipping Information

Same Day Shipping

Orders placed by 3:00 pm PST Monday-Friday for “off-the-shelf“, in-stock items are normally shipped same day by UPS.  Although we stock the vast majority of the items on our online store, we cannot assure that they will all be on hand at all times. We ship every order as quickly as possible, and in the event of a delay, be assured that we are working hard to get your order shipped promptly. Due to order volume during holidays, we cannot guarantee that all orders placed can ship on the day after the holiday closure. 

Orders for special cut products may take a few days to ship depending on order volume. Special order products ship based on the lead times of each manufacturer. 

Shipping Service

UPS LogoUPS Shipping

UPS orders will need to be placed before 4:00 pm EST and 4:00 pm PST Monday-Friday to ship out the same business day.  We apply UPS retail rates to calculate shipping costs.  Packages may not qualify for actual wieight due to size.  If dimensional weight is applied by UPS your shipping & packing rate will be adjusted.  Packages are only insured aganst theft if signature delivery is accepted.  Request signature delivery.


Priority Mail & 1st Class order has to be placed by 11am. We will use the flat rate box service if your parts fit in the box and the service cost is less than USPS Priority Mail. USPS may not always have tracking information available.  If you request lower cost USPS shipping you agree to accept all responsibility for lost, stolen and damaged packages.

Delivery Timing

UPS Ground Delivery

USPS Delivery Timing

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