Arghh Help me please!!

The Rocketry Forum

Help Support The Rocketry Forum:

Karl

Well-Known Member
TRF Supporter
Joined
Jun 30, 2010
Messages
2,460
Reaction score
26
Yesterday , I glanced at my BigDaddy and noticed a mark on the nosecone that looks like a scratch . Today I took another glance today and noticed a well like thing on the nosecone , under closer inspection it seems to be that the nosecone has melted and still is. I put some used lead pellets in the nosecone as noseweight and coverd it with a glue called ' 151 Clear Glue ' . And since I did that It has been to a launch ect without melting , so why start now?! Heres some pics , please please please help me , as I need this to take to school on wesnesday to show the 'Rocket-Day' kids.
I've thought about sanding the area down , and filling the 'well' with epoxy?
Karl
 

Aron Sanford

Well-Known Member
Joined
Jul 9, 2004
Messages
89
Reaction score
0
Karl, looks like your glue melted rhe plastic a bit. Some glues eat plastic, better to check it on a small spot next time!
Aron
 

Karl

Well-Known Member
TRF Supporter
Joined
Jun 30, 2010
Messages
2,460
Reaction score
26
Would the epoxy trick work? I've used this stuff on fillets , and attacting fins to plastic fincans and no problems! :mad: :confused: :(
Karl
 

loopy

Well-Known Member
Joined
Dec 13, 2009
Messages
4,586
Reaction score
2
I think the problem here is that it is in the nosecone, so air can't get to it to fully cure and set. try putting the tip in some cold water and leave it out of the rocket for awhile so air can get in through the aft end of the nose cone. I have an Estes Maverick that did that when I glued the nose weight in with plastic cement. Two days after I built it, I noticed spots in the NC. I pulled it off, and the smell from the plastic cement was still as strong as the day I applied it. I let it sit out of the rocket for a few days, and it seems fine now.

Loopy
 

Steward

Well-Known Member
Joined
Jan 18, 2009
Messages
874
Reaction score
1



I've never seen anything like it before... in model rockets.

I have melted plastic models before using too much plastic cement.




 

hokkyokusei

Well-Known Member
Joined
Apr 16, 2012
Messages
2,908
Reaction score
3
Originally posted by Karl
Would the epoxy trick work? I've used this stuff on fillets , and attacting fins to plastic fincans and no problems! :mad: :confused: :(
Karl
Have you got any filler, like microballoons or chopped glass? Epoxy without filler is hard to sand.

Otherwise, get some p38 car filler or ronseal two part wood filler. They will do the job (don't mix those in to the epoxy though!)
 

Karl

Well-Known Member
TRF Supporter
Joined
Jun 30, 2010
Messages
2,460
Reaction score
26
I do have some 12min Epoxy and some Fibreglass Tissue that could be chopped into the fibre? Also some Ronseal Woodfiller ( Not 2 part ) .
Karl
 

hokkyokusei

Well-Known Member
Joined
Apr 16, 2012
Messages
2,908
Reaction score
3
When I was talking about epoxy filler, I meant the fine stuff you mix in for doing stuff like fillets. In my experience 12 min epoxy is almost impossible to sand! Mixing in home cut fibreglass will bulk up the epoxy, but not really make it much easier to sand.

I haven't tried the "one part" ronseal, so I can't really recommend that either!
 
Top