My new Irvine 61
08-10-2013, 12:56 PM
#1
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My new Irvine 61
What should I do, I bought a new in box Irvine 61, the made in England version with the black carb. Should I sell it or keep it?
08-10-2013, 09:28 PM
#4
There were a few variations on the 61 but all are worth using. They came as both side and rear exhaust, Dykes ringed or ABC. The RE could be had with either standard or piped timings. I have a review of a ringed RE version at http://sceptreflight.net/Model%20Eng...0(ringed).html which is the same as one of my .61's but I also have another, a 61RLS, that's completely different to the normal Irvines. The performance of the Sport 61 mentioned at the end of that review is quite amazing 
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08-11-2013, 02:00 PM
#6
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Thread Starter
Looks like I can actually post again.
I currently have an Irvine 25, 36, 40, 46, 53 and 1.50. All red cases except the 36 which is a red head. However they were all gifts(sort of) and have a lot of sentimental value. I was thinking to maybe sell the 61 and get something like the OS 75 AX for my Escapade .60.
I currently have an Irvine 25, 36, 40, 46, 53 and 1.50. All red cases except the 36 which is a red head. However they were all gifts(sort of) and have a lot of sentimental value. I was thinking to maybe sell the 61 and get something like the OS 75 AX for my Escapade .60.
08-11-2013, 08:39 PM
#7
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Irvine .61
Jeffie
They are fine engines. Howeve, not worth much second hand unless a little exotic like DownUnder's .61 RLS. I have a couple, a plain case .61 Dykes Ring and fire-breathing .61 R ABC.
My personal view would be to keep the .61 unless you really need the funds. I expect it would achieve $50 to $80 should you decide to on-line auction it.
They are fine engines. Howeve, not worth much second hand unless a little exotic like DownUnder's .61 RLS. I have a couple, a plain case .61 Dykes Ring and fire-breathing .61 R ABC.
My personal view would be to keep the .61 unless you really need the funds. I expect it would achieve $50 to $80 should you decide to on-line auction it.
08-12-2013, 06:06 PM
#8
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This red case made in England 61 is new in the box, never seen fuel. I think it would be a shame to just use it when there is a collector out there that needs one.
04-13-2015, 04:40 PM
#9
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Dear Downunder, I have just purchased an Irvine 61 RLS but I know nothing about it. What sets it apart from the other Irvines ? Wich prop does it uses ? Is it a long stroke ? Any inputs will be greatly appreciated.
04-13-2015, 06:01 PM
#10
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Jeffie... You should run it. I'm jealous and if I could pry it from your hands I'd have it blasting away in my garage annoying the neighbors in no time, next I'd be looking for something to put it in. what a shame to leave it setting - Irvines run so well if it throttles and sings as well as a .53.
BTW, why don't you snatch that NIB Irvine 150 that's calling my name in the ads right now so I can stop being temped to blow my kids birthday reserve. This stuff is like crack.
BTW, why don't you snatch that NIB Irvine 150 that's calling my name in the ads right now so I can stop being temped to blow my kids birthday reserve. This stuff is like crack.
Last edited by iFrinkso; 04-13-2015 at 06:11 PM.
04-13-2015, 07:15 PM
#12
I guess you know you've got a very rare Irvine there . The 61RLS is a bit like my 40RLS in that it's based on their normal RE crankcases but uses parts from their other engines to make a hybrid. The 61 starts off with the crankcase from the Mk2 RE. The crankshaft, conrod and wrist pin circlips come from the Q72 so the stroke is 24mm compared to the normal 61RE which is 22mm. To keep it as a 61 the bore is reduced from 23.85mm (as measured on my normal ringed 61RE) to 23mm so it's considered to be a long stroke. The piston, liner, wristpin, cylinder head and head shim are unique to the RLS because of the smaller bore size. The normal 61RE has a compression ratio of 10.4:1 while the RLS is 13.6 and is the highest I've ever come across in a standard engine and is precisely the compression I've found to be ideal for zero nitro fuel so I'd be careful about using any nitro.
Port timings are quite different to the RE with exhaust at 71 BBDC, transfer at 55 BBDC and boost at 45 BBDC (the 61RE uses 76, 67, 61). Crankshaft timings are different too because of the Q72 crankshaft so now opens at 45 ABDC and closes at 54 ATDC compared to the 61RE with 45/58. These port timings indicate that it's been designed for high torque at lower revs so if you want to use a tuned pipe then it would need to be set a bit longer than usual for most piped engines.
I've never found anything on the internet about these engines but I'd assume they were Irvine's answer to the Hanno Special. Likewise it's unknown how many of these were made. As a guide to prop sizes though, I've scanned the leaflet that came with mine (which is NIB ).
. The 61RLS is a bit like my 40RLS in that it's based on their normal RE crankcases but uses parts from their other engines to make a hybrid. The 61 starts off with the crankcase from the Mk2 RE. The crankshaft, conrod and wrist pin circlips come from the Q72 so the stroke is 24mm compared to the normal 61RE which is 22mm. To keep it as a 61 the bore is reduced from 23.85mm (as measured on my normal ringed 61RE) to 23mm so it's considered to be a long stroke. The piston, liner, wristpin, cylinder head and head shim are unique to the RLS because of the smaller bore size. The normal 61RE has a compression ratio of 10.4:1 while the RLS is 13.6 and is the highest I've ever come across in a standard engine and is precisely the compression I've found to be ideal for zero nitro fuel so I'd be careful about using any nitro. Port timings are quite different to the RE with exhaust at 71 BBDC, transfer at 55 BBDC and boost at 45 BBDC (the 61RE uses 76, 67, 61). Crankshaft timings are different too because of the Q72 crankshaft so now opens at 45 ABDC and closes at 54 ATDC compared to the 61RE with 45/58. These port timings indicate that it's been designed for high torque at lower revs so if you want to use a tuned pipe then it would need to be set a bit longer than usual for most piped engines.
I've never found anything on the internet about these engines but I'd assume they were Irvine's answer to the Hanno Special. Likewise it's unknown how many of these were made. As a guide to prop sizes though, I've scanned the leaflet that came with mine (which is NIB
).
04-13-2015, 07:22 PM
#13
Senior Member
Thread Starter
I have a 1.50 and I ended up spending a bunch of money to buy a plane to fly it 
It is still in the assembly stage (as in initial stages meaning still in the box but next on the list)
I did run my 61 however it doesn't have very good pinch which I find unusual however it does run ok but I need to fly it to see how well it will do for an entire flight. If it ends up sagging I will be distressed.
It is still in the assembly stage (as in initial stages meaning still in the box but next on the list)
I did run my 61 however it doesn't have very good pinch which I find unusual however it does run ok but I need to fly it to see how well it will do for an entire flight. If it ends up sagging I will be distressed.
