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Re: Composite Craft RPM '91 Worlds build thread

Posted: Thu Oct 12, 2023 4:46 pm
by Retro rc
These are what we were running in 94
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But my memory must be screwed 😂 as I thought they were a 2000 Mah version

Re: Composite Craft RPM '91 Worlds build thread

Posted: Fri Oct 13, 2023 5:53 am
by sandkil
Yep,
Early to mid nineties the Sanyo SCRC 1700 and the Panasonic P170 SCR was the cells to use.

Re: Composite Craft RPM '91 Worlds build thread

Posted: Fri Oct 13, 2023 5:56 pm
by jcwrks
Electronics have been selected.
  • Big Jim mod is a '94 Kinwald teardown that is new but no packaging
  • Tekin G12 esc ('94)
  • Tekin TFM 75MHz Rx ('92)
  • Orion V-Max 1700 SCRC cells ('94)
  • Futaba 9101 coreless ball bearing servo ('90?)
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Re: Composite Craft RPM '91 Worlds build thread

Posted: Sat Oct 14, 2023 9:01 pm
by jcwrks
It turns out that the Orion battery is actually a RC-1700 (late '97) pack and not SCRC. Fortunately I had a spare pack of Trinity EXR178 Ex-Tech cells.

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I was able to get the Futaba 9101 servo mounted up. For the small Kimbrough saver I had to use vintage AE ball cups and a Tecnacraft turnbuckle since the RPM cups and Lunsford would bind.

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The large #121 servo saver needed trimmed like a #123 to clear the upper deck. I had to use a MIP BJ ball end that had a slightly shorter neck than the TRC aluminum one. I am able to use my last two RPM translucent rod ends with this modification.

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Re: Composite Craft RPM '91 Worlds build thread

Posted: Mon Oct 16, 2023 8:27 am
by jcwrks
The esc and rx are mounted on the chassis, and I have the wires where I want them. I decided to go ahead and work on mounting the body. It's a scoop-less RCPS Turbo Mirage painted by Perry @ SRS Raceway in Scottsdale, AZ back in '93/94. The sharpie around the windows is original and I will not be fixing it. I'll toss a few vintage decals on there to give it some added flair. Wing is a Bud's #5240 Pro-Flow 5.5" with AE aluminum wing things. Wing sits roughly 1/8" above the top of the body. Getting real close to finishing this one up. :mrgreen:

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Re: Composite Craft RPM '91 Worlds build thread

Posted: Mon Oct 16, 2023 8:42 am
by MarkyDents
Paint job is awesome !! Perfect !

Re: Composite Craft RPM '91 Worlds build thread

Posted: Tue Oct 17, 2023 8:58 am
by jcwrks
MarkyDents wrote: ↑Mon Oct 16, 2023 8:42 am Paint job is awesome !! Perfect !
Thanks. It's definitely a period correct paint job, and the scheme is really eye-catching.

I decided to solder up the electronics last night. I swapped the smaller 13 ga positive wire for a 12 ga since I would have hard wired the battery lead to the single run instead of using a separate jumper. I've never understood why Tekin doesn't solder on a 12 ga + from the factory on several of their high end units but includes a separate 12 ga jumper. Seems odd since the manuals state "(3) 12 ga silicone".

The antenna tube is from my spare parts bin I had back in '93/94. The antenna mount is Trinity ('92 EV10ss) and has a slightly lower profile compared to the original AE mount. I don't think I am going to solder the battery up even though I have some snazzy Dan's gold bars. RPM Hydra gear cover found its way into the pic. I keep trying to think of something I would have done different, but at this stage there is nothing I would change. I need to put it on a scale and check the weight.

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Re: Composite Craft RPM '91 Worlds build thread

Posted: Fri Oct 20, 2023 9:31 am
by jcwrks
Fortunately I have a decent stash of vintage decals on hand. I didn't want to go crazy putting them all over the place though. I finally managed to find an elusive vintage Composite Craft decal that I will put on the chassis once it arrives. I'll add a few more decals to the body once I figure out which ones to use.

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Re: Composite Craft RPM '91 Worlds build thread

Posted: Fri Oct 20, 2023 9:58 am
by MarkyDents
Looking great, must have given you that warm fuzzy feeling inside when cutting away most of the nose on that beautiful body :lol:

Re: Composite Craft RPM '91 Worlds build thread

Posted: Sat Oct 21, 2023 9:02 pm
by jcwrks
MarkyDents wrote: ↑Fri Oct 20, 2023 9:58 am Looking great, must have given you that warm fuzzy feeling inside when cutting away most of the nose on that beautiful body :lol:
I made sure to cut a little at a time with my dremel. Fortunately it all worked out in the end.

Re: Composite Craft RPM '91 Worlds build thread

Posted: Sat Oct 21, 2023 9:19 pm
by jcwrks
Today I was able to replace the front 8-32 bellcrank screws with shorter 5/8" aluminum screws. I know I could have taken a cutoff wheel to the existing ones, but I actually needed them for another upcoming build. I finished applying the decals, put the RPM translucent Hydra gear cover on, and swapped out the Mip battery brace for the elusive Composite Craft brace. I realize the end of the brace is supposed to slide under the upper lip of the rear bulkhead, but I didn't want to mar the cell since it's a really tight fit. This race ready buggy tips the scale @ 49.5 oz. with 7 gold battery bars.

I still have my Plane Phantom Pro pit box from the mid 90's, so I pulled out the CE Turbo30 and my Futaba 3PB PCM1024. Blast from the past.

I have some Autographics race number decals shipping to me on Monday, so I will eventually add those and post a final pic or two.

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Re: Composite Craft RPM '91 Worlds build thread

Posted: Sat Oct 21, 2023 9:47 pm
by MarkyDents
Really is a next level phenomenal build 8)

Re: Composite Craft RPM '91 Worlds build thread

Posted: Tue Oct 24, 2023 12:10 pm
by jcwrks
It's always nice to hear from people that have had a huge impact on the hobby.

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Re: Composite Craft RPM '91 Worlds build thread

Posted: Wed Oct 25, 2023 11:27 pm
by RPMfieldtester
jcwrks wrote: ↑Tue Oct 24, 2023 12:10 pm It's always nice to hear from people that have had a huge impact on the hobby.
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Good ol Richard...hopefully get down there to see him soon...

Re: Composite Craft RPM '91 Worlds build thread

Posted: Wed Oct 25, 2023 11:28 pm
by RPMfieldtester
jcwrks wrote: ↑Sat Oct 14, 2023 9:01 pm It turns out that the Orion battery is actually a RC-1700 (late '97) pack and not SCRC. Fortunately I had a spare pack of Trinity EXR178 Ex-Tech cells.
I ran those 1700 trinity cells in 96 too at the worlds...car is great as is but would be "more correct" with the red 1400 cells too