Der Big Red Max Pro

This is the Estes Der Big Red Max Pro model rocket kit skill level 5.

Estes Der Big Red Max Pro Model Rocket Kit Skill Level 5 #9721
 (4)
 Estes Rockets # est9721
$43.69
 
Retail $54.99  SAVE 21% !
Estes Rockets Item # est9721
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Spotlight Review

 
"Great Service"
blknght_7
This is an Estes kit, so I expect it will be up to Estes' usual quality. I won't be building it right away, so I left all the individual bags sealed. I did open the box, to make certain everything was there. Everything appeared to be in good condition.

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Reviews

  
 
"Okay for BP motors, but needs beefing up for Composites"
stumptl
This DBRM is a nice Estes kit, but I really didn’t like those 3-piece balsa fins. Besides being a pain to assemble, they were of a very soft & floppy 1/8 inch balsa. I was too lazy to reinforce the fins with carbon tissue or fiberglass, and I finally decided I didn't want the weight of plywood, so just made my own one-piece basswood fins. Perfect. I did reinforce those wimpy cardboard centering rings with layers of balsa; glued it on and trimmed to the size of the cardboard; now they're stronger and take the glue (I used mostly epoxy) better. I added a kevlar line attached through the top centering ring, tied to a PS II elastic shock cord, and have added a PS II cloth parachute for recovery. There should be enough space inside to use a Chute Release with bigger motors. This should all make the DBRM strong enough for any hobby composite motor this bird can hold. I will post a photo when the decor is complete. (Mine will be the yellow MAX ;-)

 
"Der Big Red Max Pro Series II PN 9721 Renamed to Der Ultra Red Max PS II"
champfluff
The 3-inch dia. ESTES Der Big Red Max PS II PN 9721 is renamed after their original, but discontinued 1.64-inch dia. ESTES Der Big Red Max PN 1403, but about twice as large and it should be renamed Der Ultra Red Max a little bit smaller than the ESTES discontinued 4-inch Der Mega Red Max. If you purchase 2 ESTES 3-inch body tubes PN 031799 along with an ESTES 3-inch Tube Coupler PN 031800, you can produce Der Ultra Big Red Max PS II. Cut these tubes and join together for a total length of 33-inches. This would be a more reliable Cert.1 rocket for longer chute life, if you still use the plastic parachute included in this kit, if not, then use lots of flame retardant chute wadding. I would upgrade the shock cord to Kevlar, use a Kevlar chute protector and upgrade the chute to a 24-inch nylon parachute. The 3-piece balsa wood fins should be reinforced with paper laminate on both sides and Cyanoacrylate adhesive works best for the strongest and lightest fins possible. If you upgrade the fins and centering rings to plywood you could up-power this kit to 38mm rocket motors, but you will have to add nose weight, for spectacular Cert.2 launches. You can also use a 7x24mm motor cluster for more selections and final total impulse, plus lots of smoke and fire. All these mods would put this rocket out of sight and again need a GPS tracker.

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