Quantcast

Stuck engine -Help needed

The Rocketry Forum

Help Support The Rocketry Forum:

dave298

New Member
Joined
Aug 13, 2020
Messages
3
Reaction score
3
Hi- I’ve been getting the grand kids into model rocketry and recently we had an Estees Alpha rockets get stuck in a tree. My wife went back a few days latter and to my surprise found it on the ground, and in flyable condition. Problem is, it must have rained a bit and the moisture caused the engine to swell and it won’t come out. (I’ve exerted as much force with pliers, etc. as I can with destroying it). Has anyone got a suggestion on how I might free it? There is space around it. I could drip some water or fluid around it but I thought I check with the experts first. Thanks!

Grandpa Dave
 

neil_w

Hunkered down and slowly going crazy
TRF Supporter
Joined
Jul 14, 2015
Messages
9,450
Reaction score
2,659
Location
Northern NJ
Clear out the nozzle, and then try peeling out the layers of the motor from the inside. Once it's thinned down enough you should be able to deform it and get it out.

Make sure the rest of the rocket is still structurally sound after getting wet.
 

BEC

Well-Known Member
Joined
Feb 19, 2009
Messages
3,203
Reaction score
292
Location
Auburn, WA
Neil beat me to it. That's the safest way to do it.
 

dave298

New Member
Joined
Aug 13, 2020
Messages
3
Reaction score
3
Thank you both! Using an xacto knife I can only reach the bottom quarter of the engine. Is there a better tool or an alternate method. I'm not having much luck with this.
 

crossfire

Lifetime Supporter
TRF Lifetime Supporter
Joined
Jan 16, 2011
Messages
4,093
Reaction score
388
Thank you both! Using an xacto knife I can only reach the bottom quarter of the engine. Is there a better tool or an alternate method. I'm not having much luck with this.
A long thin blade screw driver.
 

BEC

Well-Known Member
Joined
Feb 19, 2009
Messages
3,203
Reaction score
292
Location
Auburn, WA
Again Neil beat me to it. That's what I do - stick some thin needle-nosed pliers in between the inside and a few inner layers, then twist.
 

Flyfalcons

Well-Known Member
Joined
Apr 14, 2015
Messages
2,372
Reaction score
542
Needle-nosed pliers to grab the corner and then twist the layer out from inside?
This is exactly what I do. You should be able to work one of the "needles" in between cardboard layers of the motor casing. Then start twisting to pull the cardboard apart.
 

rklapp

NAR# 109557
TRF Supporter
Joined
May 8, 2020
Messages
598
Reaction score
375
Location
Oahu, Hawaii
When I had a stuck motor that I could only get half of, I ended up drilling out the rest. I also took out the motor block so sanded out the glue and reinstalled.
 

dave298

New Member
Joined
Aug 13, 2020
Messages
3
Reaction score
3
Thank you all for your helpful suggestions. I wasn't having much luck with the screwdriver so I attached a hose clamp on the end of the engine so I could get a better grip and then I stuffed some paper towel into the spent engine and used an eye dropper to add water to the towel. I let this soak for a few hours hoping it would soak through the casing and lossen it's attachment to the engine mount, and it worked! The Alpha will fly agin, and the grandson is happy! Thanks again for all your suggestions!
 

Latest posts

Top