Mega Der Red Max Plywood Fin Upgrade Set of 3

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  • Estes 29mm motor retainer


These 1/8 inch thick plywood replacement fins for the Estes Der Mega Red Max kit are a great option to improve your build strength and durability over the stock composite fins that can be damaged in transit, during assembly, or in flight.  Laser cut to the original specifications, this fin set includes a set of 3 centering rings; the middle centering ring interlocks with the slot in the fin tab, and the forward centering ring includes a plywood shock cord mount. You can also add common additional components for this retro build. 

A Note on Stability and Fin Flutter

Just be aware that by flying higher power motors in this kit, you do need to consider stability and fin flutter as a part of the equation.  These are very large fins for 1/8 inch balsa or plywood, so be mindful that at a high enough speed, your rocket's fins can flutter so much that they shear off the airframe tube. Using this kit with high power motors likely requires fiberglass reinforcement of fins and airframe.  Also, as you fly larger motors,  your center of gravity moves farther back, closer to the center of pressure, which can destabilize your rocket, particularly in strong winds' additional nose weight is likely needed for this upgrade, particularly with larger motors. You can use the Rocksim file below to determine best motors for your particular build, but the Aerotech G76-4 stands out as a nice motors with this kit.


Simulation Files

rocksim-logo.jpg Design File with Plywood Upgrade Kit and 29m MMT



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Additional Information

Weight (per fin):
2.72 ounces (77 grams)
Root Edge:
7.5 inches (190.5 mm)
Semi Span:
8.625 inches (219 mm)
Trailing Edge:
6.5 inches (165 mm)
Leading Edge:
9.625 inches (244.5 mm)
Tip Chord:
6.75 inches (171.5 mm)
1/8 inch (3mm)
Tab Depth:
1.375 inches (35 mm)
Tab Length:
4.0625 inches (103 mm)
Tab Offset:
2.75 inches (70 mm)
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3 Reviews

  • 5
    Great upgrade!

    Posted by Dave Inskeep on 9th Feb 2021

    High quality wood, precision laser cut. Kit is out of production but you can still buy body tube and nosecone. I'm building a Mega Max from parts and these are just what I needed!

  • 5
    MDRM fin set

    Posted by TODD LESTER on 14th Jan 2021

    Great product, fit the Estes body tube like a glove! Thank you for having these available!

  • 5
    nice quality

    Posted by PATRICK PAGADUAN on 5th Jan 2021

    Using these for a scratch-built MDRM. Nice and straight. Used 1/32" balsa on both sides in lieu of the 1/16". Hope RW produces more fin upgrades for other kits.

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