In 2009 we have agreed to allow airplanes made for the current SAM S-400 event to participate with their 120 second LMR time.

The airplanes for this event are the same as those that are eligible for the SAM 1/2A Texaco RC event. This means any nominal 50 inch Old Timer or Antique airplane. We have decided to eliminate the wing loading rule in favor of a minimum 16oz RTF weight rule.

These airplanes can be flown in a Texaco style event or in a Limited Motor Run event.

Airplanes this size can use conventional RC equipment. But you can also use Mini Servos and Micro Receivers to save weight. USE PARKFLYER RECEIVERS AT YOUR OWN RISK!

Airplanes with a wingspan between 48" and 54" and weighing between 16oz. and 24oz. can be flown with a Speed 400 motor.

The Graupner Speed 400 motor is available from many sources. This is the motor that DOES NOT HAVE REPLACEABLE BRUSHES. NO MODIFICATIONS ARE ALLOWED.  It may be the the 4.8V, 6V, or 7.2V version. Any gearbox and propeller combination may be used.

Both MaxProducts and Great Planes sell this motor with their own label

Battery:

The battery capacity rule has been eliminated for the LMR event. But will be enforced for the Texaco event.

SAM 2008 rules allow NiCd, NiMh, or LiPoly batteries. The basic battery is a 100mah 7 cell NiCd or NiMh pack per 1/4lb all up flying weight. An alternative battery is a 100ma 2 cell LiPoly per 1/4lb of all up flying weight. 

For a 16oz airplane this would be a 400mah NiCd or NiMh pack. Or a 2 cell 400mah LiPoly pack.

But the SAM rules allow for an alternative battery configuration. But it maintains the amount of energy available. This is done by multiplying the cell capacity (mah) by the number of cells (7) to calculate total energy. For the basic pack that number is 700. If you wanted to use an 8 cell pack you would divide 700 by 8 to get the cell capacity allowed.

Example:

A 48" S-400 airplane weighing 16oz. This is 4 X 1/4lb. So 4 X 700 = 2800 (remember this number). Assume we want to use 350mah cells. Divide 2800 by 350 to get the maximum number of cells allowed.  2800 / 350 = 8. So an 8 cell 350mah pack would be allowed for this airplane.

Gearboxes:

SAM 2006 Electric Rules:

MotoCalc

MotoCalc is a Windows program that allows you to compare various motor/gearbox/propeller/battery combinations.

This program can be downloaded for a FREE 30 DAY TRIAL. If you like it you must then pay a $35 license fee.

Motor/Gearbox/Mount Information

LINKS

HobbyLobby (Best source for Graupner motors and gearboxes)

Bob Holman Plans (Old Time Plans)

MotoCalc (Electric Power System Calculator)