PenBits produces a range of etched brass kits for adding sprung suspensions to proprietary 4mm scale diesel locomotive bogies as part of a conversion to EM or P4 gauges. Cosmetic detailing components from our bogie springing kits are also available separately.
PenBits' bogie springing kits provide a straightforward and accessible route to fitting compliant, sprung suspensions to proprietary OO (4mm scale) diesel locomotives as part of a conversion project to P4 or EM gauges. They use fold-up etched brass construction coupled with simple steel spring wire suspension beams and require only hand tools and basic hobby metalworking skills to complete.
The articulation of six-wheeled drive units implemented by the kits - a requirement for the sprung suspension - and the springing of the unpowered central axle in A1A configurations, also provide a solution to the track-holding difficulties which have been experienced with some proprietary six-wheeled bogies.
Modification of the proprietary loco is kept to a minimum, the kits making use of the manufacturers' drive units and cosmetic bogie sideframes.
Non-functional detailing parts are provided in the bogie kits either where they form an integral part of the bogie that would otherwise not be represented, or where they are required to replace original details, most usually brake rigging, that can not be retained when EM or P4 wheelsets are fitted.
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