Quantcast

Eggscalibur scrambled

The Rocketry Forum

Help Support The Rocketry Forum:

JoeLaunchman

Launching since 1975
Joined
Jan 18, 2009
Messages
231
Reaction score
0
This disaster is my fault for not using a recommended motor. Launched the Estes Eggscalibur, with a grade A large in the payload compartment, with a D12-5, instead of the suggested D12-3. It had previously flown successfully on a D12-3, but well, that's what I had in my box at the time.

The flight was great, but the additional delay resulted in a chute deployment after substantial downward momentum had been attained. Unfortunately, the stresses were too much for the Estes chute and all the shroud line connections tore loose from the chute, sending the egg capsule on a perilous death dive. It impacted the ground with a loud thud. Upon inspection, I observed that the structural integrity of the egg capsule had failed and the egg was ejected upon impact.

To add insult to injury, the bottom section of the rocket floated into the upper branches of a rocket eating tree. Live and learn.

PICT0001.jpg


PICT0002.jpg
 

Donaldsrockets

Well-Known Member
Joined
Jan 18, 2009
Messages
3,518
Reaction score
1
Location
Fort Myers, FL
This happened to me too but I used a D12-3.

I contacted Estes Customer Service and they felt bad about what happened and sent me a new kit free of charge.:D

Give them a call at 1-800-525-7561 and explain what happened. They will most likely send you a new kit as well.;)
 

TheAviator

Well-Known Member
Joined
Jan 18, 2009
Messages
829
Reaction score
16
The other moral of this story: Estes chutes work fine until you add a little more weight and speed to the rocket at deployment. If you want a little more insurance on recovery, scrap the stock shroud lines. I use braided nylon fishing line due to its small size and high strength. Kite cord (Dacron) also works quite well, it less expensive, but slightly more bulky. No problem for your sport birds, but a problem for my competition duration models :).

One other thing, if you have Mylar tape, it makes GREAT hold reinforcement. Simply cut a piece, place it over the shroud hole, then use a hole punch on it and place your shroud line there. Makes the joints significantly stronger. I had a rather hot deployment on a D-Egglofter bird where the D12-5 was more like a D12-0. It ejected at somewhere around 500fps and only tore one shroud line.
 

Boosterdude

Well-Known Member
Joined
Jan 18, 2009
Messages
1,648
Reaction score
4
Joe, same exact thing happened to me except my egg nose cone didn't break. I launched it a second time with a reinforced chute and the same thing happened. Except as an added bonus, the eggsule crashed to the ground, and the body came down hitting my car leaving a big paint mark. Little bit of cleaner wax fixed the car up, but the rocket has never flown since.:)
 

JoeLaunchman

Launching since 1975
Joined
Jan 18, 2009
Messages
231
Reaction score
0
Donald, I took your advice, and today I received a new Eggscalibur and a pack of D12-3's from Estes.
 
Top