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Search: Posts Made By: MJD
Showing results 1 to 25 of 213
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Forum: Extreme Speed Prop Planes
06-21-2021, 04:36 AM
Replies: 686
Views: 75,131
Posted By MJD

Wow, thanks Scott. I'll keep an eye out for the...

Wow, thanks Scott. I'll keep an eye out for the sled dogs.
Forum: Extreme Speed Prop Planes
06-17-2021, 04:41 AM
Replies: 686
Views: 75,131
Posted By MJD

LOL, thanks so much. Since I am the worst...

LOL, thanks so much. Since I am the worst mailer/shipper in the world, as proven last time I made up a bunch of Demon kits, I can empathize.. but do enjoy giving him doo-doo.

Canada has not...
Forum: Extreme Speed Prop Planes
06-07-2021, 06:13 AM
Replies: 686
Views: 75,131
Posted By MJD

DOH Mike - I typed the message but never hit...

DOH Mike - I typed the message but never hit "submit".. you ought to have something now.
Forum: Extreme Speed Prop Planes
06-06-2021, 03:35 AM
Replies: 686
Views: 75,131
Posted By MJD

Yeah you should have it now.

Yeah you should have it now.
Forum: Extreme Speed Prop Planes
06-04-2021, 11:32 AM
Replies: 686
Views: 75,131
Posted By MJD

Did earlier today. I ran up the OS .91 again...

Did earlier today. I ran up the OS .91 again today, but now with the shortened Rossi header bonded to that 15cc open pipe I ran last. I may have inadvertently shortened the tuning length slightly...
Forum: Extreme Speed Prop Planes
06-03-2021, 08:16 AM
Replies: 686
Views: 75,131
Posted By MJD

I would love those wing tips. Happy to pay you...

I would love those wing tips. Happy to pay you for them. Shawn will owe me of course.. :-). I found the receipt where I sent it LOL.

I spotted a note where I think it was Shawn commenting that he...
Forum: Extreme Speed Prop Planes
05-31-2021, 07:12 AM
Replies: 686
Views: 75,131
Posted By MJD

Since I did not plan to run my OS .77 at full...

Since I did not plan to run my OS .77 at full tilt either (and would thus need to put together a longer pipe package for it anyways), I cut off the integral adapter and mated the pipe to a Rossi 10cc...
Forum: Extreme Speed Prop Planes
05-20-2021, 07:09 AM
Replies: 686
Views: 75,131
Posted By MJD

FYI I compared the carbon pipe to my OS .77 stock...

FYI I compared the carbon pipe to my OS .77 stock pipe - they are remarkably similar in profile,the only difference I could see was that the convergent cone is a bit shorter because it terminates in...
Forum: Extreme Speed Prop Planes
05-11-2021, 11:58 AM
Replies: 686
Views: 75,131
Posted By MJD

Yeah, could be, it was colder on the earlier...

Yeah, could be, it was colder on the earlier runs. Also, saving a few ounces of pipe weight is worth a few rpm.. so obsessing is not likely necessary.
Forum: Extreme Speed Prop Planes
05-10-2021, 11:23 AM
Replies: 686
Views: 75,131
Posted By MJD

I ran up the OS .91 on a slightly smaller pipe,...

I ran up the OS .91 on a slightly smaller pipe, 1.75" OD versus the 2.25" pipe. I think it is a 15cc marine pipe. Tweaked length up and down a bit, but still lost about 200 rpm on the top - was...
Forum: Extreme Speed Prop Planes
04-21-2021, 04:41 AM
Replies: 686
Views: 75,131
Posted By MJD

Thanks Scott. I thought it was you who had...

Thanks Scott. I thought it was you who had written that before, memory is a soluble thing. I'll get hold of Shawn - thx.

My cores are pre-sheeted, the retract bays are in, it has a laminated...
Forum: Extreme Speed Prop Planes
04-20-2021, 09:50 AM
Replies: 686
Views: 75,131
Posted By MJD

LOL, I was toying with mentioning those tips just...

LOL, I was toying with mentioning those tips just for fun! I never did get them, no, but he did have them supposedly ready to ship at one point. I suppose if there was a time to get them it would be...
Forum: Extreme Speed Prop Planes
04-20-2021, 06:03 AM
Replies: 686
Views: 75,131
Posted By MJD

I measured up the pipe, I would say it is a...

I measured up the pipe, I would say it is a .90-.120 muffled marine pipe (came in a goodie box). The inlet is 3/4" ID, max OD is 2.25", and it has a 2" section at full diameter before the converging...
Forum: Extreme Speed Prop Planes
04-19-2021, 04:55 PM
Replies: 686
Views: 75,131
Posted By MJD

Yeah I don't typically run fuel out of the jug in...

Yeah I don't typically run fuel out of the jug in the propped DF engines, I always bring total oil up to 22-23%, and don't need a lot of nitro to go fast enough for _hits and giggles. I use SIG...
Forum: Extreme Speed Prop Planes
04-19-2021, 11:57 AM
Replies: 686
Views: 75,131
Posted By MJD

OK, what am I seeing here and under what...

OK, what am I seeing here and under what conditions? I was advised that keeping the rpm under 20k would do a lot to keep the engine together. Am I wasting my time?

p.s. no wonder your handle is...
Forum: Extreme Speed Prop Planes
04-19-2021, 11:24 AM
Replies: 686
Views: 75,131
Posted By MJD

Yeah, for my OPS .65. Ran like a bear but the...

Yeah, for my OPS .65. Ran like a bear but the first 2-3" got cooked a bit. I'd be happy to send it down for forensics.

I made an executive decision on the engine, decided to use an OS .91 VRDF set...
Forum: Extreme Speed Prop Planes
04-19-2021, 11:16 AM
Replies: 686
Views: 75,131
Posted By MJD

I run the very same prop on my OPS .45 DF...

I run the very same prop on my OPS .45 DF engines. The 85% dia trimmed bench version turns 26.5k static.
Forum: Extreme Speed Prop Planes
04-19-2021, 10:12 AM
Replies: 686
Views: 75,131
Posted By MJD

Speaking of which, I still have not got off my...

Speaking of which, I still have not got off my dead arse and fixed that 10cc open pipe like I said I was going to. I might just have had the pipe length off and ran the header too hot. I think...
Forum: Extreme Speed Prop Planes
04-19-2021, 04:39 AM
Replies: 686
Views: 75,131
Posted By MJD

The West pipe is heavy too. I switched to a MAC's...

The West pipe is heavy too. I switched to a MAC's open pipe on the West .50, and set it up to run about 21 - 21.5k on trimmed APC pylon props. It ran great and it was fast, but it never topped the...
Forum: Extreme Speed Prop Planes
01-11-2021, 07:10 PM
Replies: 686
Views: 75,131
Posted By MJD

Nice work! Did you add shear webs at the...

Nice work!

Did you add shear webs at the back of the D box? Will really perk up the torsional stiffness. Glad to see the wing jigs doing their thing!

You have the makings of a 300kph machine...
Forum: Extreme Speed Prop Planes
12-29-2020, 04:57 PM
Replies: 686
Views: 75,131
Posted By MJD

I flew my prototype Demon on a West .50 that I...

I flew my prototype Demon on a West .50 that I previously flew on a Magnum R. I set it up on the bench with an open pipe peaking at 20,500 rpm, best speeds were on a 8.8x9.25 trimmed down to about...
Forum: Extreme Speed Prop Planes
12-28-2015, 11:52 AM
Replies: 686
Views: 75,131
Posted By MJD

I am about to make another small batch of them. I...

I am about to make another small batch of them. I do this on a very casual basis, but your timing is good.. PM me.
Forum: Extreme Speed Prop Planes
12-03-2015, 03:34 PM
Replies: 686
Views: 75,131
Posted By MJD

I hate flying in 30's temps too.. I lost the...

I hate flying in 30's temps too.. I lost the ambition to be a year rounder sometime (decades?) ago. You'll not likely see another video of me flying on New Year's day, I did that one with the .010...
Forum: Extreme Speed Prop Planes
12-02-2015, 05:59 PM
Replies: 686
Views: 75,131
Posted By MJD

Oh yeah, you can fly all year down there, forgot....

Oh yeah, you can fly all year down there, forgot. Flying season pretty much done, the odd nice afternoon here and there..

Heel sounds painful! I am on week 10 recovering from having bone spurs...
Forum: Extreme Speed Prop Planes
11-22-2015, 03:54 PM
Replies: 686
Views: 75,131
Posted By MJD

How do you like the cute little spar fixture...

How do you like the cute little spar fixture things?
Showing results 1 to 25 of 213
 
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