New CRRC Pro GP50R prototype 50cc
#76
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RE: New CRRC Pro GP50R prototype 50cc
ORIGINAL: jedijody
I'm well Mike, hope you are too! My middle son is home now, got married this last summer. The youngest graduates in a couple months and then is off to ROTC, I'll be an empty nester. []
I'm well Mike, hope you are too! My middle son is home now, got married this last summer. The youngest graduates in a couple months and then is off to ROTC, I'll be an empty nester. []
At least they are safe.
Hope to get in the air again soon.
Hunting is all done, but the TO-DO list isn't. LOL
#78
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RE: New CRRC Pro GP50R prototype 50cc
Hi All
I have the CRRC 50 pro R installed in my ESM Spitfire. A great set up and I have had about 12 flights - but - on my last flight I noticed a different noise from the engine. On investigation I discovered that all but 1 on the bolts holding on the the prop had sheared off in the prop hub! I have tried to drill out the left over stubs but with out success and have made a bit of a mess of the hub . Part of my problem is that with the tools I have I was not able to get the prop hub off, but now I guess I have no option to pull the old one and replace.
Firstly has anyone else out there had the same problem? And secondly is there a trick to getting the prop hub off or is it a case of just using a wheel puller?
I would appreaciate any views on the matter
Thanks
I have the CRRC 50 pro R installed in my ESM Spitfire. A great set up and I have had about 12 flights - but - on my last flight I noticed a different noise from the engine. On investigation I discovered that all but 1 on the bolts holding on the the prop had sheared off in the prop hub! I have tried to drill out the left over stubs but with out success and have made a bit of a mess of the hub . Part of my problem is that with the tools I have I was not able to get the prop hub off, but now I guess I have no option to pull the old one and replace.
Firstly has anyone else out there had the same problem? And secondly is there a trick to getting the prop hub off or is it a case of just using a wheel puller?
I would appreaciate any views on the matter
Thanks
#79
RE: New CRRC Pro GP50R prototype 50cc
If you have a prop drill jig you can use it to pull the prop hub, Take off the prop nut shaft and mount the prop jig with the long part facing the crank shaft, Use some short 5mm bolts and when you screw them down it will remove the hub. They are hard to get off but do not heat it or you might destroy the magnet.
I use a DA prop drill jig, It is center taped for 1/4-20 bolt.
Milton
I use a DA prop drill jig, It is center taped for 1/4-20 bolt.
Milton
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RE: New CRRC Pro GP50R prototype 50cc
He really can't use the prop jig as a puller since he has broken prop bolts on the hub.
If you really do not have th right tools or skills to do the repair, I suggest sending the engine to Jody and he will fix you up.
He probably has the prop hub in stock, I know I had got one from him at one point in time.
I used heat ( a heat gun ) to heat ( expand ) the hub and do the swap and it still was tough.
DO NOT pry between the hub and engine case with anything or you will be also looking to replace the shaft seal and possibly a engine case.
If you really do not have th right tools or skills to do the repair, I suggest sending the engine to Jody and he will fix you up.
He probably has the prop hub in stock, I know I had got one from him at one point in time.
I used heat ( a heat gun ) to heat ( expand ) the hub and do the swap and it still was tough.
DO NOT pry between the hub and engine case with anything or you will be also looking to replace the shaft seal and possibly a engine case.
#81
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RE: New CRRC Pro GP50R prototype 50cc
Thanks Guys
Got it sorted - tapped two holes to 6mm and used a gear puller to pull against the prop washer (held on by two 6mm bolts). Put on a replacement hub and all good to go. Thanks again.
Got it sorted - tapped two holes to 6mm and used a gear puller to pull against the prop washer (held on by two 6mm bolts). Put on a replacement hub and all good to go. Thanks again.