New Space Bug From Parts

dckrsn Wed Nov 25, 2020 9:29 pm

Hi, I'm building up a later model Space Bug, and I've hit
a snag. To the point, do the later Bugs have a one or
two bypass cylinder? I thought the P-40 cylinder was
the first dual bypass. Dunno. Also, 3(4) piece piston, correct?
I searched, but couldn't come up with any answers.
I've accumulated almost all the parts over a few years,
and almost gave up trying to find a new crank. Matt at
ExModel Engines took care of that.
http://www.exmodelengines.com/
https://www.coxengineforum.com/t14487-new-parts-lot-1
So I'm hoping to wind up with a
new Space Bug from new old parts parts soon.
Happy Thanksgiving Thanksgiving Dinner

Pass the gravy please.
Bob

**Cribbs74** Wed Nov 25, 2020 10:54 pm

Hey Bob, noble project. I don’t know how long they were in production internet says ‘52-‘58. All I can speak to is the one I have it’s a single bypass small thread head with 3 piece piston.

If they did change configuration throughout production just pick the year for the parts you have on hand.

Someone here knows more about this.

Edit: So yeah... I got off my rear and went back out to the shop, spent the whole day out there working on my pickup bed prepping to install new wood, so I didn’t want to go back out. My conscience got the better of me so I thought I should go and look. Basically disregard everything I wrote previously. 302-1 head, dual bypass thin walled cylinder with no markings, normal piston and SPI.

Hope that helps a little. That’s what I get for going off of memory.

Ron

getback Thu Nov 26, 2020 6:38 am

Hey Bob early SB 1952 for wiki. and the Jrs 1953 small thread 1 by-pass spi ? I have one that does and the other don't ?!? but that's a Jr. two difft. colors i only have the newer pis/cly in the SB Sr. hope this helps Turkey

one day maybe we can . Very Happy

dckrsn Thu Nov 26, 2020 5:29 pm

Thanks guys. So, looks like it'll have the screened trumpet
intake, later flanged case, numbered thin wall #1 cylinder
and period correct head. I couldn't locate an un-numbered
cylinder, but what the hey.
Ron, thanks for trudging back out to the garage.
Eric, I think about that alot.
Beer Cheers

Bob

rsv1cox Thu Nov 26, 2020 6:14 pm

Ron's got you pretty much covered for spec.s

You picked the right one, I think the "trumpet" has more character, but both are pretty neat.

Kim flew a pair of these R/C a few years ago. Impressive. He actually fly's these things. Smile

dckrsn Fri Jan 22, 2021 7:33 pm

Muchas Questiones.
Is the flanged case with the small thread P/C an anomaly?
I'm willing to cannibalize an early correct SpaceBug Jr to assemble
an early SpaceBug. If I had an unflanged case for the SpaceBug, everything
would be solved(that ain't happening). This period correct thing is a bit of
an effort. The SpaceBug and Jrs are two different animals. You can't mount
a Bug Jr case on a Bug tank, and vice versa.
I don't know why this has become such an obsession, oops, too late.
I guess I'm looking for an unflanged Space Bug case
Bob

**Cribbs74** Fri Jan 22, 2021 8:02 pm

What do you need to assemble the Space Bug as is without having to cannibalize?

dckrsn Fri Jan 22, 2021 9:06 pm

Hey, Ron. i guess it'll take an unflanged Bug case to seal the deal, or,
I can go back to plan A, and stick with the later model Bug specs.
It's a little weird to be conversing about something so trivial, while
someone is dying every 7 minutes. Crying or Very sad

Hug your loved ones folks, and wear a mask.
Bob

**Cribbs74** Fri Jan 22, 2021 9:29 pm

Trivial or not, there isn’t a thing you can do Bob. Don’t worry about tomorrow sufficient are the worries of today. Virus or no virus people are dying at a rate of 105 a minute worldwide on a good day. We can’t mourn all the time or we would never live ourselves.

So, immerse yourself in what makes you comfortable. I don’t have a spare case, but let me look at my Space Bug Jr front end. If it’s an un flanged case maybe we can swap front ends. I don’t have any concerns about what style case it is and it’s made up from parts anyway.

Ron.

P.S. a pic showing what the difference is would be good as I am not entirely sure what you are talking about. Nevermind I figured it out!

**Cribbs74** Fri Jan 22, 2021 9:57 pm

Your in luck Bob! My Space Bug Jr. has a non-flanged case. Be happy to swap for your flanged one....

crankbndr Fri Jan 22, 2021 10:23 pm

I'll look at my cylinders tomorrow, they are pretty rare and don't think I have one. I wonder if you could drill through the upper bolt holes on SBJ case to reverse the bolt and work on SB tank?

Oldenginerod Sat Jan 23, 2021 6:02 am

So, if someone can please fill me in?? I have an original Space Bug with the later cylinder with larger head threads. I'm confident that this engine is all original as I got it from the guy who had it shipped out to him new in Canada. (Now lives down the road from me). But just to be sure, what features should I be looking for regarding the case differences?

rsv1cox Sat Jan 23, 2021 6:57 am

@Cribbs74 wrote:Trivial or not, there isn’t a thing you can do Bob. Don’t worry about tomorrow sufficient are the worries of today. Virus or no virus people are dying at a rate of 105 a minute worldwide on a good day. We can’t mourn all the time or we would never live ourselves.

So, immerse yourself in what makes you comfortable. I don’t have a spare case, but let me look at my Space Bug Jr front end. If it’s an un flanged case maybe we can swap front ends. I don’t have any concerns about what style case it is and it’s made up from parts anyway.

Ron.

P.S. a pic showing what the difference is would be good as I am not entirely sure what you are talking about. Nevermind I figured it out!

Glad you found out Ron, But I'm still struggling to see the difference, they all look the same to me.

Didn't have to go out to the garage to get these, but I did have to dig them out of the display case, no easy task. Smile

There are a few more in there stuck away. Way away.

Got an appointment to get "The Shot" this morning. 70 and older here in WV.

**Cribbs74** Sat Jan 23, 2021 7:03 am

Good luck Bob!

If you look at the yellow Space Bug Jr. in your pic and compare it to the Space Bug right beside it you will see that yellow one has a pronounced casting ridge where it meets the tank while the Space Bug does not.

Ron

Edit: I read Doug’s post again and I see another big difference... the bolts enter from the rear on mine and they need to be coming from the front! So my case probably won’t work for the other Bob. Been messing with these things for over almost 40yrs and still learning stuff!

rsv1cox Sat Jan 23, 2021 7:15 am

@Cribbs74 wrote:Good luck Bob!

If you look at the yellow Space Bug Jr. in your pic and compare it to the Space Bug right beside it you will see that yellow one has a pronounced casting ridge where it meets the tank while the Space Bug does not.

Ron

Edit: I read Doug’s post again and I see another big difference... the bolts enter from the rear on mine and they need to be coming from the front! So my case probably won’t work for the other Bob. Been messing with these things for over almost 40yrs and still learning stuff!

Got it. Thanks Ron.

Had to dig them out again.

Edit to your edit Ron.

I noticed that first thing, but aren't the cases drilled and tapped all the way through enabling the machine screws to come from either end?

getback Sat Jan 23, 2021 7:21 am

Nice Collection Bob , the reason you don't see the difference is what you show is all non flange lol!

Sorry just had too , congrads on the for coming SHOT , Were not there yet for my age I wasn't aware that the two cases wouldn't interchange Shocked

The older is the non flange right? Dickerson i thought you had this puppy done and talking about problems , i have had constipation for 3 days now going to get me some prunes today Sh*t Hit The Fan

My Bad i didnt see that , i went and looked at mine and all are the early non flange at least what is in my case .

rsv1cox Sat Jan 23, 2021 7:28 am

@getback wrote:Nice Collection Bob , the reason you don't see the difference is what you show is all non flange Sorry just had too , congrads on the for coming SHOT , Were not there yet for my age I wasn't aware that the two cases wouldn't interchange The older is the non flange right? Dickerson i thought you had this puppy done and talking about problems , i have had constipation for 3 days now going to get me some prunes today

The more i think about it, that wouldn't work either, the SB's case would have to be smooth, no threads.

**Cribbs74** Sat Jan 23, 2021 8:37 am

Bob2

I went out and checked to see what else I might have and I have two engines that would fit the bill. Both Thermal Hoppers however, both examples are new and un-run and correct down to the heads and cage. I am really hesitant to break either of them down for parts. I would be more inclined just to send one to you, but I guarantee that you won’t be able to break it down for parts either and you won’t be any better off.

What to do... Maybe someone here has a case they can give you, Heaven knows you are certainly deserving of a gift!

crankbndr Sat Jan 23, 2021 10:30 am

Just looked at my SBJ and SB, no reason you can't drill out top and bottom lugs and reverse the bolts that I can see. You would need the SB bolts.
But I have made some gross errors in the past. lol!

**Cribbs74** Sat Jan 23, 2021 11:51 am

Bob. I would be happy to drill the holes in my SBJ case for you.

Mudhen Sat Jan 23, 2021 12:23 pm

Not to throw a wrench in the plans...
The earliest version of the Space Bug crankcase had a bronze sleeve.
These lasted from 1951 to roughly mid-1953

dckrsn Sat Jan 23, 2021 12:32 pm

@Cribbs74 wrote:Bob. I would be happy to drill the holes in my SBJ case for you.

No need, Ron, but thanks for the generous offer. Last night I ordered one from Matt. I checked
to see if he had listed any of his "pallet of parts", and he had one. It's an unflanged Jr case, but I'll
drill it out. That parts lot was where I found the Bug crank. When I'm done, I'll have a late model
SB Jr, and an early model SB.
Bob

**Cribbs74** Sat Jan 23, 2021 1:13 pm

Good deal, glad you are sorted out!

rsv1cox Sat Jan 23, 2021 1:43 pm

@Mudhen wrote:Not to throw a wrench in the plans...
The earliest version of the Space Bug crankcase had a bronze sleeve.
These lasted from 1951 to roughly mid-1953

I think one of my Space Bugs has that bronze sleeve. I remember it was so unusual that I made a mental note of it, but I didn't snap a picture that I can find. I won't rest easy until I take the things apart again. Sad

Drilling out a Jr's case would be real easy. But getting the proper case is the best option..

rsv1cox Sat Jan 23, 2021 1:47 pm

[quote= , i have had constipation for 3 days now going to get me some prunes today Sh*t Hit The Fan

[/quote]

The more i think about it, that wouldn't work either, the SB's case would have to be smooth, no threads.[/quote]

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To much information Eric. Smile

But ya, that prune thing. I buy them in the big bag from Costco. Five a day keeps me err.... regular.

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