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RE: H9 Jackal 50 Prop Jet
This jackal painted looks better than the original , also I like the smaller canopy aspect , very very cool !!!
Posted on: 9/13/2012 11:29 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11228020
RE: OS91 FX
APC 12x10 , 10% nitro , A8 plug , stock muffler 11,500 RPM.
Posted on: 9/6/2012 11:08 PM by Author "SpeedBoy"
in the forum "Tachometer Readings"
http://www.rcuniverse.com/forum/fb.asp?m=11220368
RE: OS AX 46 needs more power
[quote]ORIGINAL: flyer1966 What happens when you add a extra head gasket to the motor. [/quote] You reduce the compression of the combustion chamber so it can handle better the high nitro content.
Posted on: 7/23/2012 10:23 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11166883
RE: Master K vs APC
Some weeks ago I ordered a couple of these props. http://www.espritmodel.com/aeronaut-propellers-cam-electric-glow.aspx Im still waiting for it , the guys of support tell me they are tested up to 30,000 RPM ( 9" and 10" size) according to they are made of carbon fiber , have some of you tested one of these props ??? I ordered these props because I need a prop that can handle 25,000 RPM and be safe in the size of 9"-10" , is a shame APC props dont make carbon fiber props in this range with high pitch, it seems they got forgotten the speed freaks , I bet there are enough guys willing to pay for this kind of props.
Posted on: 7/17/2012 5:09 PM by Author "SpeedBoy"
in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11159222
RE: Master K vs APC
I like more the performance of APC and so far I have had better results with them for speed , I have even modified the leading edge and airfoil of the APC props to increase the performance it tooks me about 2 hrs to do the job without spoil the prop and without leave it too thin but after that its well rewarded what it makes once in the air. This props are stiff enough to allow do this work and end it up without flexing too much. Even stock both props I would take APC for almost every airplane at least you plan to do bad landings [:D] .
Posted on: 7/16/2012 11:37 PM by Author "SpeedBoy"
in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11158261
RE: Production carbon props
I think I need to test one of these props on my picco 60. Thanks for the link freakingfast.
Posted on: 4/2/2012 9:21 AM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=11025080
RE: *** Ultra Sport Brotherhood ***
Looks very good , what spinner you have there ??? is the ultimate or the standar shape ??? I have always used the standar shape but in this model it looks very cool the one you have.
Posted on: 3/13/2012 6:47 PM by Author "SpeedBoy"
in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=10999105
RE: OS 65 AX
Good !!!! then I think nothing bad for this engine.
Posted on: 9/6/2011 7:57 PM by Author "SpeedBoy"
in the forum "Tachometer Readings"
http://www.rcuniverse.com/forum/fb.asp?m=10705032
RE: 15 ccm extrem speedmodell
Michael , Are you using the same prop with this twin model than when single engine ???. Or did you increase the pitch and decrease the diameter on this one ???
Posted on: 9/5/2011 6:23 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10703245
RE: 15 ccm extrem speedmodell
HOOLYYYYYY ........ PLANE !!!!!!!!!!!!!
Posted on: 9/5/2011 4:48 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10703121
RE: OS 65 AX
[quote]ORIGINAL: airraptor bone stock 11x8 13,100 [/quote] APC prop ???
Posted on: 9/4/2011 1:48 PM by Author "SpeedBoy"
in the forum "Tachometer Readings"
http://www.rcuniverse.com/forum/fb.asp?m=10701227
RE: H9 Jackal 50 Prop Jet
[quote]ORIGINAL: jetdryvr I spoke with my friend (builder) Steve who told me he didnt do anything other than what the directions said with respect to aileron/elevator attachment to wing/stab. Erik [/quote] Thanks jetdryvr , good to know it. Anyway I think would be fine if you check that screws periodically , just for in case.
Posted on: 5/15/2011 9:45 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10522404
RE: H9 Jackal 50 Prop Jet
[quote]ORIGINAL: jetdryvr No flutter. I've only had a few planes that I didn't make flutter at some point though. My friend Steve put it together for me and I think he pinned them. [/quote] Do you know if your friend glue the stab with epoxy or if he olny used the screws ???
Posted on: 5/9/2011 5:17 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10510838
RE: Rex 57 (Novarossi)
This engine with the stock muffler did the same that my YS 45 with tuned pipe on the 10x7 APC. Nothign disapointing to me. Lets wait to see the numbers with the 9" props. [8D]
Posted on: 4/25/2011 5:57 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10484788
RE: Rex 57 (Novarossi)
[quote]ORIGINAL: MJD [quote]ORIGINAL: gsalort1978 Hello, I have this engine http://www.planethobby.com/product.php?productid=504&cat=28&page=1 and It is a powerfull engine, but I have never seem a Jett running. [/quote] Do you have any rpm/prop info to compare? [/quote] I was going to ask the same.
Posted on: 4/22/2011 6:24 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10479136
RE: GP Patriot 40
[quote]ORIGINAL: littledevile420 speedboy what mods are doene to your rossi and what pipe is that look great [/quote] littledevile , sorry by not have answered your question , I didnt see it until today. The engine is totally stock no mods on there , the pipe is the muffled pipe 7.5 cc by macs products. Regards.
Posted on: 4/18/2011 11:49 PM by Author "SpeedBoy"
in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=10471455
RE: 9x10 carbon props for speed freaks
I really dont know if are real the rpm he said , I want to think is true as he said the plane with this engine was clocked at 200 mph and even more when he changed the prop to a 9x8.5 . He also told me that everyone on the field keeps saying is going to blow the props apart but it hasn't happened yet and that he always stand behind the engine when reving it up on the ground. Im in the search of cf props anyway , just for in case you know. [:D]
Posted on: 2/2/2011 6:29 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10308246
RE: 9x10 carbon props for speed freaks
[quote]ORIGINAL: MJD [quote]ORIGINAL: SpeedBoy OK thanks guys. After the engine arrives to my home I'll do that. This is the engine I won ( any clue guys ??? ) , I hope it be the one with highest exhaust timing , if not .... well what else . [:D] [/quote] I think that is the pattern engine. Here are pictures of the Picco .60 speed, and .65 ducted fan engines: http://www.rcuniverse.com/forum
Posted on: 2/2/2011 3:47 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10307869
RE: H9 Jackal 50 Prop Jet
[quote]ORIGINAL: summerwind the Jackal will easily punch a hole in a 3D bird[:D][:D][:D] [/quote] That would be fun ... lol [:D]
Posted on: 11/1/2010 7:50 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10109530
RE: VMAR F-5 any experience
Many sites says this ..... OS 91FX SPECIFICATIONS: Displacement: 0.912 cu in (15.0cc) Bore: 1.091 in (27.7mm) Stroke: 0.976 in (24.8mm) Practical RPM: 2,000-16,000 Output: 2.8 bhp (ps) @ 15,000 rpm [color=#CC0000]Weight: 19.3 oz (550g)[/color] Includes: Muffler, Safety Propeller Locknut Assembly, #8 glow plug Requires: fuel, mount & prop Recommended Propellers: 13x8-9 O.S. 75 AX Specifications: Displacement: 0.75 cu in (12.3cc) Bore: 1.02" (25.8mm) Stroke: 0.93" (23.5mm) Practical RPM: 2,000-16,000 r.p.m. Power Output: 2.4ps/15,000 r.p.m. [color=#CC3300]Weight: 20.39 onuces (578g) w/o muffler[/color] 26.46 ounces (750g) w/ muffler Recommended Props: 14x6, 14x8, 15x7 Crankshaft thread size: 5/16-24 Distance from center of engine to drive hub: 2.62" (66.6mm) Height from crankcase bottom to top of cylinder head: 4.07" (103.5mm) Height/crankshaft center to top of cylinder head: 3.20" (81.5mm) Width including mounting tabs: 2.4" (61mm) Width not including mounting tabs: 1.67" (42.6mm) Width between mounting holes same side: .98 (25mm) Width between mounting holes opposite side: 2.04" (52mm) Diameter of muffler body: 1.92" (48.8mm) Angle of muffler in relation to engine: 4 degrees
Posted on: 10/6/2010 8:48 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10052639
RE: VMAR F-5 any experience
I would love to see the report of this jet , of course pictures are always welcome . [:D] btw , the OS 75 weights more than the 91. [X(]
Posted on: 10/3/2010 2:58 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10044638
RE: GP Patriot 40
Wingspam , I have been using Dave Brown mechanical retracts for more than 8 years now , with no problem so far , that brand are my first choice when looking mechanical retracts. Regards.
Posted on: 9/12/2010 3:13 AM by Author "SpeedBoy"
in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=9996012
RE: Doubting the speeds posted
[quote]ORIGINAL: MJD Doesn't matter. It strictly represents a geometric distance based on the pitch angle of the blade and the helical path it would scribe if rotated one revolution with no slippage. The possibility of getting close to this number in real life is dependent on aerodynamics (of the aircraft and the prop) and power. If it helps anyone, I recall my eyes opening and thinking ''aha!'' when I began to understand and visualize relative wind as it affects the prop's angle of attack. The angle of attack of the blades changes with airspeed and rpm, think about it. It's easier to first forget rpm change, just think about a prop moving along at ever increasing airspeed, constant rpm, and the angle of the relative wind. When that clicks, you'll suddenly appreciate better the significance of the term pitch speed and the issues surrounding it. This diagram ain't bad. Here, the prop shaft runs horizontally, and you are looking at an end on view of the prop blade, i.e. the engine is pointing to the right. So you can see how a high pitch prop can end up operating at the same angle of attack in flight as a low pitch prop - but it has to be moving faster to do so. MJD [/quote] I think I understand what you saying , anyway I still have some questions. Are you saying that if we have a "x" prop at "x" rpm working at 30,000 feet and -20°C it would behaves equal than at sea level and 40°C??? it would advance the same distance in both cases ??? does not matter the density of the mean in wich the prop is traveling ??? Lets suppose that we are talking just from a prop , so we dont have to consider the coefficient of drag of an airplane. Everything is in a good way bro . [;)] Thanks.
Posted on: 6/21/2010 10:15 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9818452
RE: Doubting the speeds posted
Someone knows on what kind of air density the pitch speed calculator is working ???
Posted on: 6/8/2010 1:24 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9789723
RE: Looking for suggestions
The Rossi should make the best job on speed , if you want to use a 11" prop , that would be a 11x6 , I did test 11x7 apc on mine and wasn't able to rev up as I wanted. Then you can go with 10x7 or 10x8 apc and would work well , then you can try a 9x8 , 9x9 or 9x10 and see what prop does the best job for you. Anyway , if the target is speed you can go just straight with the 9" prop and use the throttle as Daven said . Regards.
Posted on: 4/7/2010 2:46 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9644379
RE: kyosho Kelly F-1
z06kal , I wish I could answer your questions , but this is not my plane , its of a friend of mine , I didnt the job , I just took the pictures and flew it . If I get some info about it I'll share it here . [;)] Regards.
Posted on: 3/3/2010 12:27 AM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9550423
RE: TT .61 Pro full length Mac's Pipe
[quote]ORIGINAL: Mr67Stang The engine is very used. So yes, it is totally broke in. The piston is actually brown in color instead of the normal dull alluminium. I imagine it starts out kinda loose and does not completely seal until up to operating temperature. [/quote] Considering its very used and is developing 15k , I think I need to give a chance to this engine in the future. My Rossi 53 is able to develop just 500 rpm more with the same prop. Good job bro !!! [8D]
Posted on: 2/27/2010 2:21 PM by Author "SpeedBoy"
in the forum "Tachometer Readings"
http://www.rcuniverse.com/forum/fb.asp?m=9540431
RE: kyosho Kelly F-1
[quote]ORIGINAL: z06kal Any close up pics of the retract mod? Pretty cool! [/quote] Here you have . [:D]
Posted on: 2/25/2010 1:23 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9534776
RE: kyosho Kelly F-1
[quote]ORIGINAL: z06kal Any close up pics of the retract mod? Pretty cool! [/quote] Here you have . [:D]
Posted on: 2/25/2010 1:20 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9534764
RE: kyosho Kelly F-1
[quote]ORIGINAL: summerwind Hector, i like this plane, and now i like it even better.............is the Kelly still available? [/quote] Yep , it is still available.... [;)] http://www.kyosho.com/eng/products/rc/detail.html?product_id=102521
Posted on: 2/25/2010 1:05 PM by Author "SpeedBoy"
in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9534726
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